/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-sub06.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:51:49,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:51:49,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:51:49,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:51:49,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:51:49,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:51:49,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:51:49,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:51:49,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:51:49,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:51:49,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:51:49,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:51:49,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:51:49,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:51:49,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:51:49,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:51:49,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:51:49,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:51:49,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:51:49,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:51:49,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:51:49,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:51:49,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:51:49,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:51:49,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 18:51:49,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 18:51:49,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 18:51:49,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 18:51:49,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 18:51:49,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 18:51:49,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:51:49,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:51:49,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:51:49,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:51:49,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:51:49,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:51:49,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:51:49,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:51:49,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:51:49,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:51:49,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:51:49,491 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 18:51:49,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:51:49,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:51:49,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:51:49,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:51:49,520 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:51:49,520 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:51:49,520 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:51:49,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:51:49,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:51:49,521 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:51:49,521 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:51:49,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:51:49,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:51:49,522 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:51:49,522 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:51:49,522 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:51:49,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:51:49,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:51:49,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:51:49,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:51:49,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:51:49,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:51:49,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:51:49,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:51:49,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:51:49,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:51:49,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:51:49,523 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:51:49,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:51:49,524 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:51:49,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:51:49,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:51:49,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:51:49,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:51:49,803 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:51:49,804 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:51:49,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub06.bpl [2021-08-21 18:51:49,805 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub06.bpl' [2021-08-21 18:51:49,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:51:49,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:51:49,825 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:51:49,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:51:49,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:51:49,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:51:49,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:51:49,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:51:49,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:51:49,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:51:49,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:51:49,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:51:49,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:51:49,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/1) ... [2021-08-21 18:51:49,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:51:49,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:49,881 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 18:51:49,900 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 18:51:49,912 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:51:49,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:51:49,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:51:49,913 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-08-21 18:51:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-08-21 18:51:49,913 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-08-21 18:51:49,913 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 18:51:50,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:51:50,048 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-21 18:51:50,049 INFO L202 PluginConnector]: Adding new model add-sub06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:51:50 BoogieIcfgContainer [2021-08-21 18:51:50,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:51:50,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:51:50,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:51:50,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:51:50,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:51:49" (1/2) ... [2021-08-21 18:51:50,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eff3ee2 and model type add-sub06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:51:50, skipping insertion in model container [2021-08-21 18:51:50,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:51:50" (2/2) ... [2021-08-21 18:51:50,061 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub06.bpl [2021-08-21 18:51:50,064 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:51:50,064 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:51:50,064 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:51:50,064 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:51:50,108 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,108 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,108 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,109 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,109 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,109 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,109 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,109 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,110 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,110 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,110 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,110 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,110 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,111 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,111 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,111 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,111 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,111 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,112 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,112 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,112 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,112 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,112 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,113 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,113 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,113 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,113 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,113 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,114 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,114 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,114 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,114 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,114 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,115 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,115 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,115 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,117 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,120 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,121 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,123 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,125 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork4_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,127 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork5_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 18:51:50,139 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-08-21 18:51:50,171 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:51:50,175 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 18:51:50,175 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-21 18:51:50,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 6828 states, 4695 states have (on average 1.8413205537806177) internal successors, (8645), 6827 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:50,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:51:50,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:50,809 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:50,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:50,815 INFO L82 PathProgramCache]: Analyzing trace with hash 638491097, now seen corresponding path program 1 times [2021-08-21 18:51:50,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:50,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548538509] [2021-08-21 18:51:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:50,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:50,950 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 18:51:50,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:50,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548538509] [2021-08-21 18:51:50,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548538509] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:50,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:50,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-08-21 18:51:50,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51789813] [2021-08-21 18:51:50,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:51:50,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:51:50,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:51:50,972 INFO L87 Difference]: Start difference. First operand has 6828 states, 4695 states have (on average 1.8413205537806177) internal successors, (8645), 6827 states have internal predecessors, (8645), 0 states have call successors, (0), 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 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:51,058 INFO L93 Difference]: Finished difference Result 8284 states and 10643 transitions. [2021-08-21 18:51:51,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:51:51,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:51:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:51,081 INFO L225 Difference]: With dead ends: 8284 [2021-08-21 18:51:51,082 INFO L226 Difference]: Without dead ends: 1653 [2021-08-21 18:51:51,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:51:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-08-21 18:51:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1476. [2021-08-21 18:51:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 1.5132203389830508) internal successors, (2232), 1475 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 2232 transitions. [2021-08-21 18:51:51,191 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 2232 transitions. Word has length 20 [2021-08-21 18:51:51,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:51,191 INFO L470 AbstractCegarLoop]: Abstraction has 1476 states and 2232 transitions. [2021-08-21 18:51:51,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 2232 transitions. [2021-08-21 18:51:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:51:51,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:51,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:51,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:51:51,197 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash 839164693, now seen corresponding path program 1 times [2021-08-21 18:51:51,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:51,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536646363] [2021-08-21 18:51:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:51,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:51,277 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 18:51:51,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:51,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536646363] [2021-08-21 18:51:51,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536646363] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:51,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:51,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:51:51,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444155327] [2021-08-21 18:51:51,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:51:51,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:51,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:51:51,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:51,280 INFO L87 Difference]: Start difference. First operand 1476 states and 2232 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:51,320 INFO L93 Difference]: Finished difference Result 1757 states and 2739 transitions. [2021-08-21 18:51:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:51:51,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:51:51,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:51,326 INFO L225 Difference]: With dead ends: 1757 [2021-08-21 18:51:51,326 INFO L226 Difference]: Without dead ends: 1750 [2021-08-21 18:51:51,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:51,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-08-21 18:51:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1490. [2021-08-21 18:51:51,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 1.5204835460040296) internal successors, (2264), 1489 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 2264 transitions. [2021-08-21 18:51:51,355 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 2264 transitions. Word has length 23 [2021-08-21 18:51:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:51,356 INFO L470 AbstractCegarLoop]: Abstraction has 1490 states and 2264 transitions. [2021-08-21 18:51:51,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 2264 transitions. [2021-08-21 18:51:51,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:51:51,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:51,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:51,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:51:51,365 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:51,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1484264387, now seen corresponding path program 1 times [2021-08-21 18:51:51,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:51,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825254325] [2021-08-21 18:51:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:51,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:51,457 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 18:51:51,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:51,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825254325] [2021-08-21 18:51:51,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825254325] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:51,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:51,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:51:51,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395724414] [2021-08-21 18:51:51,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:51:51,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:51,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:51:51,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:51,463 INFO L87 Difference]: Start difference. First operand 1490 states and 2264 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:51,507 INFO L93 Difference]: Finished difference Result 1777 states and 2827 transitions. [2021-08-21 18:51:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:51:51,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:51:51,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:51,513 INFO L225 Difference]: With dead ends: 1777 [2021-08-21 18:51:51,514 INFO L226 Difference]: Without dead ends: 1770 [2021-08-21 18:51:51,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2021-08-21 18:51:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1512. [2021-08-21 18:51:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 1.5645268034414295) internal successors, (2364), 1511 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 2364 transitions. [2021-08-21 18:51:51,543 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 2364 transitions. Word has length 23 [2021-08-21 18:51:51,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:51,543 INFO L470 AbstractCegarLoop]: Abstraction has 1512 states and 2364 transitions. [2021-08-21 18:51:51,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 2364 transitions. [2021-08-21 18:51:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:51:51,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:51,546 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:51,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:51:51,546 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:51,548 INFO L82 PathProgramCache]: Analyzing trace with hash -249889723, now seen corresponding path program 1 times [2021-08-21 18:51:51,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:51,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134409058] [2021-08-21 18:51:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:51,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:51,669 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 18:51:51,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:51,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134409058] [2021-08-21 18:51:51,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134409058] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:51,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:51,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:51:51,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580681122] [2021-08-21 18:51:51,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:51:51,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:51,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:51:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:51,674 INFO L87 Difference]: Start difference. First operand 1512 states and 2364 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:51,723 INFO L93 Difference]: Finished difference Result 1783 states and 2893 transitions. [2021-08-21 18:51:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:51:51,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:51:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:51,729 INFO L225 Difference]: With dead ends: 1783 [2021-08-21 18:51:51,730 INFO L226 Difference]: Without dead ends: 1776 [2021-08-21 18:51:51,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-08-21 18:51:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1529. [2021-08-21 18:51:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 1.5968586387434556) internal successors, (2440), 1528 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2440 transitions. [2021-08-21 18:51:51,756 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2440 transitions. Word has length 23 [2021-08-21 18:51:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:51,756 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 2440 transitions. [2021-08-21 18:51:51,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2440 transitions. [2021-08-21 18:51:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:51:51,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:51,760 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:51,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 18:51:51,760 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:51,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1065406215, now seen corresponding path program 1 times [2021-08-21 18:51:51,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:51,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731922841] [2021-08-21 18:51:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:51,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:51,824 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 18:51:51,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:51,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731922841] [2021-08-21 18:51:51,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731922841] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:51,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:51,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:51:51,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366732684] [2021-08-21 18:51:51,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:51:51,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:51,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:51:51,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:51,827 INFO L87 Difference]: Start difference. First operand 1529 states and 2440 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:51,863 INFO L93 Difference]: Finished difference Result 1792 states and 2922 transitions. [2021-08-21 18:51:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:51:51,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:51:51,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:51,869 INFO L225 Difference]: With dead ends: 1792 [2021-08-21 18:51:51,869 INFO L226 Difference]: Without dead ends: 1785 [2021-08-21 18:51:51,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:51,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-08-21 18:51:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1545. [2021-08-21 18:51:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 1.6120466321243523) internal successors, (2489), 1544 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2489 transitions. [2021-08-21 18:51:51,896 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2489 transitions. Word has length 23 [2021-08-21 18:51:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:51,896 INFO L470 AbstractCegarLoop]: Abstraction has 1545 states and 2489 transitions. [2021-08-21 18:51:51,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2489 transitions. [2021-08-21 18:51:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:51:51,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:51,900 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] [2021-08-21 18:51:51,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 18:51:51,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:51,904 INFO L82 PathProgramCache]: Analyzing trace with hash 648035405, now seen corresponding path program 1 times [2021-08-21 18:51:51,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:51,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007935067] [2021-08-21 18:51:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:51,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:51,964 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 18:51:51,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:51,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007935067] [2021-08-21 18:51:51,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007935067] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:51,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:51,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:51:51,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397538288] [2021-08-21 18:51:51,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:51:51,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:51,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:51:51,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:51,968 INFO L87 Difference]: Start difference. First operand 1545 states and 2489 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:52,003 INFO L93 Difference]: Finished difference Result 1833 states and 2979 transitions. [2021-08-21 18:51:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:51:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:51:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:52,009 INFO L225 Difference]: With dead ends: 1833 [2021-08-21 18:51:52,009 INFO L226 Difference]: Without dead ends: 1822 [2021-08-21 18:51:52,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2021-08-21 18:51:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1564. [2021-08-21 18:51:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 1.620601407549584) internal successors, (2533), 1563 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2533 transitions. [2021-08-21 18:51:52,036 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2533 transitions. Word has length 23 [2021-08-21 18:51:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:52,037 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2533 transitions. [2021-08-21 18:51:52,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2533 transitions. [2021-08-21 18:51:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 18:51:52,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:52,040 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:52,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 18:51:52,040 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:52,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1111340211, now seen corresponding path program 1 times [2021-08-21 18:51:52,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:52,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067556723] [2021-08-21 18:51:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:52,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:52,086 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 18:51:52,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:52,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067556723] [2021-08-21 18:51:52,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067556723] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:52,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:52,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 18:51:52,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860331872] [2021-08-21 18:51:52,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:51:52,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:52,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:51:52,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:52,088 INFO L87 Difference]: Start difference. First operand 1564 states and 2533 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:52,128 INFO L93 Difference]: Finished difference Result 1863 states and 3115 transitions. [2021-08-21 18:51:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:51:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 18:51:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:52,133 INFO L225 Difference]: With dead ends: 1863 [2021-08-21 18:51:52,134 INFO L226 Difference]: Without dead ends: 1856 [2021-08-21 18:51:52,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:51:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-08-21 18:51:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1582. [2021-08-21 18:51:52,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 1.6470588235294117) internal successors, (2604), 1581 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 2604 transitions. [2021-08-21 18:51:52,163 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 2604 transitions. Word has length 23 [2021-08-21 18:51:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:52,163 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 2604 transitions. [2021-08-21 18:51:52,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 2604 transitions. [2021-08-21 18:51:52,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:52,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:52,167 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:52,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 18:51:52,168 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:52,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1811641983, now seen corresponding path program 1 times [2021-08-21 18:51:52,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:52,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924348484] [2021-08-21 18:51:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:52,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:52,239 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 18:51:52,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:52,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924348484] [2021-08-21 18:51:52,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924348484] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:52,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:52,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:52,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602418557] [2021-08-21 18:51:52,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:52,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:52,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:52,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:52,240 INFO L87 Difference]: Start difference. First operand 1582 states and 2604 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:52,288 INFO L93 Difference]: Finished difference Result 1963 states and 3311 transitions. [2021-08-21 18:51:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:52,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:52,294 INFO L225 Difference]: With dead ends: 1963 [2021-08-21 18:51:52,294 INFO L226 Difference]: Without dead ends: 1956 [2021-08-21 18:51:52,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 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 18:51:52,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-08-21 18:51:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1587. [2021-08-21 18:51:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 1.6387137452711222) internal successors, (2599), 1586 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 2599 transitions. [2021-08-21 18:51:52,325 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 2599 transitions. Word has length 26 [2021-08-21 18:51:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:52,325 INFO L470 AbstractCegarLoop]: Abstraction has 1587 states and 2599 transitions. [2021-08-21 18:51:52,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 2599 transitions. [2021-08-21 18:51:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:52,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:52,329 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] [2021-08-21 18:51:52,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 18:51:52,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:52,330 INFO L82 PathProgramCache]: Analyzing trace with hash -577267319, now seen corresponding path program 1 times [2021-08-21 18:51:52,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:52,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532756341] [2021-08-21 18:51:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:52,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:52,379 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 18:51:52,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:52,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532756341] [2021-08-21 18:51:52,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532756341] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:52,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:52,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:52,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872399888] [2021-08-21 18:51:52,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:52,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:52,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:52,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:52,380 INFO L87 Difference]: Start difference. First operand 1587 states and 2599 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:52,433 INFO L93 Difference]: Finished difference Result 1982 states and 3374 transitions. [2021-08-21 18:51:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:52,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:52,439 INFO L225 Difference]: With dead ends: 1982 [2021-08-21 18:51:52,439 INFO L226 Difference]: Without dead ends: 1975 [2021-08-21 18:51:52,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 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 18:51:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-08-21 18:51:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1617. [2021-08-21 18:51:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 1.6547029702970297) internal successors, (2674), 1616 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 2674 transitions. [2021-08-21 18:51:52,465 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 2674 transitions. Word has length 26 [2021-08-21 18:51:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:52,465 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 2674 transitions. [2021-08-21 18:51:52,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 2674 transitions. [2021-08-21 18:51:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:52,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:52,469 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:52,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 18:51:52,469 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1392783811, now seen corresponding path program 1 times [2021-08-21 18:51:52,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:52,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742457333] [2021-08-21 18:51:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:52,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:52,528 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 18:51:52,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:52,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742457333] [2021-08-21 18:51:52,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742457333] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:52,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:52,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:52,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234979687] [2021-08-21 18:51:52,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:52,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:52,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:52,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:52,530 INFO L87 Difference]: Start difference. First operand 1617 states and 2674 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:52,577 INFO L93 Difference]: Finished difference Result 1985 states and 3355 transitions. [2021-08-21 18:51:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:52,584 INFO L225 Difference]: With dead ends: 1985 [2021-08-21 18:51:52,584 INFO L226 Difference]: Without dead ends: 1978 [2021-08-21 18:51:52,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-08-21 18:51:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1639. [2021-08-21 18:51:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.670940170940171) internal successors, (2737), 1638 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2737 transitions. [2021-08-21 18:51:52,618 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2737 transitions. Word has length 26 [2021-08-21 18:51:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:52,620 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 2737 transitions. [2021-08-21 18:51:52,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2737 transitions. [2021-08-21 18:51:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:52,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:52,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:52,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-21 18:51:52,624 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash 320657809, now seen corresponding path program 1 times [2021-08-21 18:51:52,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:52,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3998052] [2021-08-21 18:51:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:52,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:52,689 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 18:51:52,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:52,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3998052] [2021-08-21 18:51:52,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3998052] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:52,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:52,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:52,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522729414] [2021-08-21 18:51:52,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:52,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:52,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:52,691 INFO L87 Difference]: Start difference. First operand 1639 states and 2737 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:52,735 INFO L93 Difference]: Finished difference Result 2030 states and 3419 transitions. [2021-08-21 18:51:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:52,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:52,741 INFO L225 Difference]: With dead ends: 2030 [2021-08-21 18:51:52,742 INFO L226 Difference]: Without dead ends: 2019 [2021-08-21 18:51:52,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-08-21 18:51:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1660. [2021-08-21 18:51:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 1.673297166968053) internal successors, (2776), 1659 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2776 transitions. [2021-08-21 18:51:52,772 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2776 transitions. Word has length 26 [2021-08-21 18:51:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:52,773 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 2776 transitions. [2021-08-21 18:51:52,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2776 transitions. [2021-08-21 18:51:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:52,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:52,776 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] [2021-08-21 18:51:52,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-21 18:51:52,777 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1438717807, now seen corresponding path program 1 times [2021-08-21 18:51:52,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:52,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048732287] [2021-08-21 18:51:52,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:52,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:52,831 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 18:51:52,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:52,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048732287] [2021-08-21 18:51:52,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048732287] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:52,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:52,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:52,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147422783] [2021-08-21 18:51:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:52,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:52,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:52,833 INFO L87 Difference]: Start difference. First operand 1660 states and 2776 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:52,887 INFO L93 Difference]: Finished difference Result 2066 states and 3533 transitions. [2021-08-21 18:51:52,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:52,894 INFO L225 Difference]: With dead ends: 2066 [2021-08-21 18:51:52,894 INFO L226 Difference]: Without dead ends: 2059 [2021-08-21 18:51:52,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-08-21 18:51:52,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1673. [2021-08-21 18:51:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 1.6620813397129186) internal successors, (2779), 1672 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2779 transitions. [2021-08-21 18:51:52,926 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2779 transitions. Word has length 26 [2021-08-21 18:51:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:52,927 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2779 transitions. [2021-08-21 18:51:52,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2779 transitions. [2021-08-21 18:51:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:52,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:52,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:52,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-21 18:51:52,931 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:52,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:52,931 INFO L82 PathProgramCache]: Analyzing trace with hash -160047263, now seen corresponding path program 1 times [2021-08-21 18:51:52,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:52,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692249028] [2021-08-21 18:51:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:52,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:52,981 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 18:51:52,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:52,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692249028] [2021-08-21 18:51:52,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692249028] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:52,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:52,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:52,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162665794] [2021-08-21 18:51:52,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:52,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:52,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:52,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:52,983 INFO L87 Difference]: Start difference. First operand 1673 states and 2779 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:53,036 INFO L93 Difference]: Finished difference Result 2100 states and 3694 transitions. [2021-08-21 18:51:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:53,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:53,043 INFO L225 Difference]: With dead ends: 2100 [2021-08-21 18:51:53,043 INFO L226 Difference]: Without dead ends: 2093 [2021-08-21 18:51:53,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-08-21 18:51:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1728. [2021-08-21 18:51:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 1.7492762015055008) internal successors, (3021), 1727 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 3021 transitions. [2021-08-21 18:51:53,069 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 3021 transitions. Word has length 26 [2021-08-21 18:51:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:53,069 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 3021 transitions. [2021-08-21 18:51:53,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 3021 transitions. [2021-08-21 18:51:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:53,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:53,073 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:53,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 18:51:53,073 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:53,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:53,074 INFO L82 PathProgramCache]: Analyzing trace with hash -975563755, now seen corresponding path program 1 times [2021-08-21 18:51:53,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:53,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353437531] [2021-08-21 18:51:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:53,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:53,121 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 18:51:53,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:53,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353437531] [2021-08-21 18:51:53,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353437531] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:53,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:53,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:53,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957813371] [2021-08-21 18:51:53,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:53,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:53,122 INFO L87 Difference]: Start difference. First operand 1728 states and 3021 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:53,171 INFO L93 Difference]: Finished difference Result 2137 states and 3833 transitions. [2021-08-21 18:51:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:53,176 INFO L225 Difference]: With dead ends: 2137 [2021-08-21 18:51:53,177 INFO L226 Difference]: Without dead ends: 2130 [2021-08-21 18:51:53,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-08-21 18:51:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1770. [2021-08-21 18:51:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 1.7902769926512154) internal successors, (3167), 1769 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 3167 transitions. [2021-08-21 18:51:53,204 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 3167 transitions. Word has length 26 [2021-08-21 18:51:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:53,204 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 3167 transitions. [2021-08-21 18:51:53,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 3167 transitions. [2021-08-21 18:51:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:53,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:53,208 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] [2021-08-21 18:51:53,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-21 18:51:53,209 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:53,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:53,209 INFO L82 PathProgramCache]: Analyzing trace with hash 737877865, now seen corresponding path program 1 times [2021-08-21 18:51:53,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:53,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061477783] [2021-08-21 18:51:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:53,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:53,258 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 18:51:53,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:53,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061477783] [2021-08-21 18:51:53,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061477783] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:53,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:53,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:53,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68870111] [2021-08-21 18:51:53,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:53,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:53,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:53,260 INFO L87 Difference]: Start difference. First operand 1770 states and 3167 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:53,318 INFO L93 Difference]: Finished difference Result 2206 states and 3964 transitions. [2021-08-21 18:51:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:53,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:53,324 INFO L225 Difference]: With dead ends: 2206 [2021-08-21 18:51:53,324 INFO L226 Difference]: Without dead ends: 2195 [2021-08-21 18:51:53,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:53,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-08-21 18:51:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1813. [2021-08-21 18:51:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 1.8073951434878588) internal successors, (3275), 1812 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 3275 transitions. [2021-08-21 18:51:53,361 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 3275 transitions. Word has length 26 [2021-08-21 18:51:53,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:53,362 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 3275 transitions. [2021-08-21 18:51:53,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 3275 transitions. [2021-08-21 18:51:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:53,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:53,366 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] [2021-08-21 18:51:53,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-21 18:51:53,366 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:53,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:53,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1021497751, now seen corresponding path program 1 times [2021-08-21 18:51:53,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:53,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151236330] [2021-08-21 18:51:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:53,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:53,413 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 18:51:53,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:53,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151236330] [2021-08-21 18:51:53,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151236330] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:53,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:53,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:53,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842301321] [2021-08-21 18:51:53,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:53,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:53,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:53,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:53,414 INFO L87 Difference]: Start difference. First operand 1813 states and 3275 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:53,468 INFO L93 Difference]: Finished difference Result 2260 states and 4181 transitions. [2021-08-21 18:51:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:53,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:53,474 INFO L225 Difference]: With dead ends: 2260 [2021-08-21 18:51:53,474 INFO L226 Difference]: Without dead ends: 2253 [2021-08-21 18:51:53,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-08-21 18:51:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1856. [2021-08-21 18:51:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 1.860377358490566) internal successors, (3451), 1855 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 3451 transitions. [2021-08-21 18:51:53,502 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 3451 transitions. Word has length 26 [2021-08-21 18:51:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:53,502 INFO L470 AbstractCegarLoop]: Abstraction has 1856 states and 3451 transitions. [2021-08-21 18:51:53,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 3451 transitions. [2021-08-21 18:51:53,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:53,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:53,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:53,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-21 18:51:53,505 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1454779431, now seen corresponding path program 2 times [2021-08-21 18:51:53,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:53,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270293839] [2021-08-21 18:51:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:53,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:53,551 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 18:51:53,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:53,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270293839] [2021-08-21 18:51:53,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270293839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:53,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075636837] [2021-08-21 18:51:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:53,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:53,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:53,561 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 18:51:53,563 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 18:51:53,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:53,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:53,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:53,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:53,800 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 18:51:53,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075636837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:53,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:53,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:53,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145936108] [2021-08-21 18:51:53,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:53,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:53,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:53,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:53,801 INFO L87 Difference]: Start difference. First operand 1856 states and 3451 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:53,848 INFO L93 Difference]: Finished difference Result 2258 states and 4246 transitions. [2021-08-21 18:51:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:53,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:53,852 INFO L225 Difference]: With dead ends: 2258 [2021-08-21 18:51:53,852 INFO L226 Difference]: Without dead ends: 2251 [2021-08-21 18:51:53,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-08-21 18:51:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1881. [2021-08-21 18:51:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 1.8819148936170214) internal successors, (3538), 1880 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 3538 transitions. [2021-08-21 18:51:53,878 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 3538 transitions. Word has length 26 [2021-08-21 18:51:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:53,879 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 3538 transitions. [2021-08-21 18:51:53,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 3538 transitions. [2021-08-21 18:51:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:53,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:53,881 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:53,901 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 18:51:54,092 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 18:51:54,093 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1867251293, now seen corresponding path program 2 times [2021-08-21 18:51:54,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:54,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82186145] [2021-08-21 18:51:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:54,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:54,133 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 18:51:54,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:54,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82186145] [2021-08-21 18:51:54,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82186145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:54,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383057349] [2021-08-21 18:51:54,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:54,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:54,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:54,135 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 18:51:54,163 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 18:51:54,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:54,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:54,381 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 18:51:54,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383057349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:54,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:54,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:54,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912635123] [2021-08-21 18:51:54,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:54,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:54,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:54,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:54,383 INFO L87 Difference]: Start difference. First operand 1881 states and 3538 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:54,437 INFO L93 Difference]: Finished difference Result 2241 states and 4252 transitions. [2021-08-21 18:51:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:54,441 INFO L225 Difference]: With dead ends: 2241 [2021-08-21 18:51:54,441 INFO L226 Difference]: Without dead ends: 2234 [2021-08-21 18:51:54,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:54,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-08-21 18:51:54,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1898. [2021-08-21 18:51:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 1.9056404849762782) internal successors, (3615), 1897 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 3615 transitions. [2021-08-21 18:51:54,465 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 3615 transitions. Word has length 26 [2021-08-21 18:51:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:54,465 INFO L470 AbstractCegarLoop]: Abstraction has 1898 states and 3615 transitions. [2021-08-21 18:51:54,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 3615 transitions. [2021-08-21 18:51:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:54,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:54,468 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] [2021-08-21 18:51:54,493 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 18:51:54,689 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,SelfDestructingSolverStorable17 [2021-08-21 18:51:54,689 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:54,689 INFO L82 PathProgramCache]: Analyzing trace with hash -85686815, now seen corresponding path program 2 times [2021-08-21 18:51:54,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:54,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535104100] [2021-08-21 18:51:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:54,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:51:54,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:54,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535104100] [2021-08-21 18:51:54,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535104100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:54,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488329806] [2021-08-21 18:51:54,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:54,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:54,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:54,731 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 18:51:54,733 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 18:51:54,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:54,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:54,969 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 18:51:54,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488329806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:54,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:54,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:54,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490105790] [2021-08-21 18:51:54,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:54,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:54,970 INFO L87 Difference]: Start difference. First operand 1898 states and 3615 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:55,024 INFO L93 Difference]: Finished difference Result 2268 states and 4346 transitions. [2021-08-21 18:51:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:55,029 INFO L225 Difference]: With dead ends: 2268 [2021-08-21 18:51:55,029 INFO L226 Difference]: Without dead ends: 2261 [2021-08-21 18:51:55,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:55,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2021-08-21 18:51:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1918. [2021-08-21 18:51:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 1.9233176838810642) internal successors, (3687), 1917 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 3687 transitions. [2021-08-21 18:51:55,057 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 3687 transitions. Word has length 26 [2021-08-21 18:51:55,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:55,057 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 3687 transitions. [2021-08-21 18:51:55,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 3687 transitions. [2021-08-21 18:51:55,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:55,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:55,061 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:55,082 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 18:51:55,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:55,277 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:55,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:55,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1229936883, now seen corresponding path program 1 times [2021-08-21 18:51:55,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:55,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293621162] [2021-08-21 18:51:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:55,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:55,315 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 18:51:55,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:55,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293621162] [2021-08-21 18:51:55,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293621162] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:55,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:55,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:55,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875997259] [2021-08-21 18:51:55,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:55,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:55,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:55,316 INFO L87 Difference]: Start difference. First operand 1918 states and 3687 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:55,382 INFO L93 Difference]: Finished difference Result 2315 states and 4449 transitions. [2021-08-21 18:51:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:55,383 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:55,387 INFO L225 Difference]: With dead ends: 2315 [2021-08-21 18:51:55,387 INFO L226 Difference]: Without dead ends: 2308 [2021-08-21 18:51:55,387 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 18:51:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-08-21 18:51:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1933. [2021-08-21 18:51:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 1.9368530020703933) internal successors, (3742), 1932 states have internal predecessors, (3742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 3742 transitions. [2021-08-21 18:51:55,411 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 3742 transitions. Word has length 26 [2021-08-21 18:51:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:55,411 INFO L470 AbstractCegarLoop]: Abstraction has 1933 states and 3742 transitions. [2021-08-21 18:51:55,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 3742 transitions. [2021-08-21 18:51:55,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:55,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:55,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:55,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-21 18:51:55,414 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:55,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:55,414 INFO L82 PathProgramCache]: Analyzing trace with hash 483504737, now seen corresponding path program 1 times [2021-08-21 18:51:55,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:55,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000349270] [2021-08-21 18:51:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:55,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:55,456 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 18:51:55,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:55,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000349270] [2021-08-21 18:51:55,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000349270] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:55,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:55,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:55,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520975108] [2021-08-21 18:51:55,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:55,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:55,458 INFO L87 Difference]: Start difference. First operand 1933 states and 3742 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:55,503 INFO L93 Difference]: Finished difference Result 2362 states and 4521 transitions. [2021-08-21 18:51:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:55,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:55,507 INFO L225 Difference]: With dead ends: 2362 [2021-08-21 18:51:55,507 INFO L226 Difference]: Without dead ends: 2351 [2021-08-21 18:51:55,507 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 18:51:55,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-08-21 18:51:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1952. [2021-08-21 18:51:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 1.9456688877498718) internal successors, (3796), 1951 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 3796 transitions. [2021-08-21 18:51:55,533 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 3796 transitions. Word has length 26 [2021-08-21 18:51:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:55,533 INFO L470 AbstractCegarLoop]: Abstraction has 1952 states and 3796 transitions. [2021-08-21 18:51:55,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 3796 transitions. [2021-08-21 18:51:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:55,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:55,536 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:55,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-21 18:51:55,536 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:55,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:55,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1275870879, now seen corresponding path program 1 times [2021-08-21 18:51:55,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:55,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100129627] [2021-08-21 18:51:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:55,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:55,572 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 18:51:55,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:55,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100129627] [2021-08-21 18:51:55,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100129627] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:51:55,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:51:55,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:51:55,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516858272] [2021-08-21 18:51:55,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:55,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:55,574 INFO L87 Difference]: Start difference. First operand 1952 states and 3796 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:55,624 INFO L93 Difference]: Finished difference Result 2391 states and 4658 transitions. [2021-08-21 18:51:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:55,628 INFO L225 Difference]: With dead ends: 2391 [2021-08-21 18:51:55,628 INFO L226 Difference]: Without dead ends: 2384 [2021-08-21 18:51:55,628 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 18:51:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-08-21 18:51:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 1990. [2021-08-21 18:51:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 1.97938662644545) internal successors, (3937), 1989 states have internal predecessors, (3937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:55,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 3937 transitions. [2021-08-21 18:51:55,651 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 3937 transitions. Word has length 26 [2021-08-21 18:51:55,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:55,652 INFO L470 AbstractCegarLoop]: Abstraction has 1990 states and 3937 transitions. [2021-08-21 18:51:55,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:55,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 3937 transitions. [2021-08-21 18:51:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:55,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:55,654 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:55,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-21 18:51:55,655 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:55,655 INFO L82 PathProgramCache]: Analyzing trace with hash -474777895, now seen corresponding path program 2 times [2021-08-21 18:51:55,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:55,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653290882] [2021-08-21 18:51:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:55,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:55,691 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 18:51:55,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:55,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653290882] [2021-08-21 18:51:55,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653290882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:55,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519921657] [2021-08-21 18:51:55,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:55,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:55,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:55,693 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 18:51:55,733 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 18:51:55,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:55,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:55,969 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 18:51:55,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519921657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:55,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:55,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:55,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524002045] [2021-08-21 18:51:55,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:55,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:55,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:55,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:55,971 INFO L87 Difference]: Start difference. First operand 1990 states and 3937 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:56,025 INFO L93 Difference]: Finished difference Result 2388 states and 4736 transitions. [2021-08-21 18:51:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:56,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:56,030 INFO L225 Difference]: With dead ends: 2388 [2021-08-21 18:51:56,030 INFO L226 Difference]: Without dead ends: 2381 [2021-08-21 18:51:56,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 18:51:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-08-21 18:51:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2015. [2021-08-21 18:51:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 2.0019860973187686) internal successors, (4032), 2014 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 4032 transitions. [2021-08-21 18:51:56,058 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 4032 transitions. Word has length 26 [2021-08-21 18:51:56,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:56,058 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 4032 transitions. [2021-08-21 18:51:56,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:56,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 4032 transitions. [2021-08-21 18:51:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:56,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:56,061 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:56,079 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 18:51:56,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:56,279 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash 598540497, now seen corresponding path program 2 times [2021-08-21 18:51:56,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:56,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913441949] [2021-08-21 18:51:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:56,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:56,324 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 18:51:56,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:56,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913441949] [2021-08-21 18:51:56,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913441949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:56,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331351494] [2021-08-21 18:51:56,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:56,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:56,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:56,325 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 18:51:56,326 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 18:51:56,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:56,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:56,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:56,597 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 18:51:56,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331351494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:56,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:56,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:56,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953681340] [2021-08-21 18:51:56,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:56,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:56,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:56,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:56,598 INFO L87 Difference]: Start difference. First operand 2015 states and 4032 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:56,637 INFO L93 Difference]: Finished difference Result 2413 states and 4803 transitions. [2021-08-21 18:51:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:56,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:56,642 INFO L225 Difference]: With dead ends: 2413 [2021-08-21 18:51:56,642 INFO L226 Difference]: Without dead ends: 2406 [2021-08-21 18:51:56,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 18:51:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-08-21 18:51:56,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2035. [2021-08-21 18:51:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 2034 states have (on average 2.0127826941986235) internal successors, (4094), 2034 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 4094 transitions. [2021-08-21 18:51:56,673 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 4094 transitions. Word has length 26 [2021-08-21 18:51:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:56,673 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 4094 transitions. [2021-08-21 18:51:56,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 4094 transitions. [2021-08-21 18:51:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:56,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:56,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:56,720 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 18:51:56,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:51:56,892 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:56,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1615563349, now seen corresponding path program 2 times [2021-08-21 18:51:56,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:56,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342957267] [2021-08-21 18:51:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:56,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:56,924 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 18:51:56,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:56,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342957267] [2021-08-21 18:51:56,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342957267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:56,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709705341] [2021-08-21 18:51:56,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:56,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:56,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:56,925 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 18:51:56,926 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 18:51:57,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:57,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:57,231 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 18:51:57,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709705341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:57,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:57,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:57,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429049994] [2021-08-21 18:51:57,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:57,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:57,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:57,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:57,232 INFO L87 Difference]: Start difference. First operand 2035 states and 4094 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:57,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:57,270 INFO L93 Difference]: Finished difference Result 2438 states and 4859 transitions. [2021-08-21 18:51:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:57,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:57,274 INFO L225 Difference]: With dead ends: 2438 [2021-08-21 18:51:57,274 INFO L226 Difference]: Without dead ends: 2431 [2021-08-21 18:51:57,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-08-21 18:51:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2060. [2021-08-21 18:51:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.020398251578436) internal successors, (4160), 2059 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:57,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 4160 transitions. [2021-08-21 18:51:57,296 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 4160 transitions. Word has length 26 [2021-08-21 18:51:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:57,297 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 4160 transitions. [2021-08-21 18:51:57,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 4160 transitions. [2021-08-21 18:51:57,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:57,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:57,300 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:57,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 18:51:57,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:57,519 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1435505207, now seen corresponding path program 2 times [2021-08-21 18:51:57,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:57,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684717149] [2021-08-21 18:51:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:57,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:57,552 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 18:51:57,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:57,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684717149] [2021-08-21 18:51:57,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684717149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:57,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895941927] [2021-08-21 18:51:57,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:57,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:57,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:57,557 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 18:51:57,592 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 18:51:57,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:57,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:57,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:57,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:57,825 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 18:51:57,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895941927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:57,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:57,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:57,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522419807] [2021-08-21 18:51:57,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:57,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:57,826 INFO L87 Difference]: Start difference. First operand 2060 states and 4160 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:57,867 INFO L93 Difference]: Finished difference Result 2429 states and 4881 transitions. [2021-08-21 18:51:57,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:57,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:57,872 INFO L225 Difference]: With dead ends: 2429 [2021-08-21 18:51:57,872 INFO L226 Difference]: Without dead ends: 2422 [2021-08-21 18:51:57,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 18:51:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-08-21 18:51:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2070. [2021-08-21 18:51:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 2.029482841952634) internal successors, (4199), 2069 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 4199 transitions. [2021-08-21 18:51:57,897 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 4199 transitions. Word has length 26 [2021-08-21 18:51:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:57,897 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 4199 transitions. [2021-08-21 18:51:57,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 4199 transitions. [2021-08-21 18:51:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:57,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:57,900 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] [2021-08-21 18:51:57,921 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 18:51:58,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:58,106 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:58,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:58,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1628248611, now seen corresponding path program 2 times [2021-08-21 18:51:58,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:58,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292718196] [2021-08-21 18:51:58,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:58,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:58,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:58,144 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 18:51:58,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:58,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292718196] [2021-08-21 18:51:58,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292718196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:58,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952403482] [2021-08-21 18:51:58,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:58,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:58,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:58,145 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 18:51:58,166 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 18:51:58,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:58,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:58,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:58,448 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 18:51:58,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952403482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:58,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:58,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:58,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374353667] [2021-08-21 18:51:58,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:58,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:58,450 INFO L87 Difference]: Start difference. First operand 2070 states and 4199 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:58,497 INFO L93 Difference]: Finished difference Result 2449 states and 4938 transitions. [2021-08-21 18:51:58,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:58,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:58,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:58,501 INFO L225 Difference]: With dead ends: 2449 [2021-08-21 18:51:58,501 INFO L226 Difference]: Without dead ends: 2442 [2021-08-21 18:51:58,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 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 18:51:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-08-21 18:51:58,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2085. [2021-08-21 18:51:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2084 states have (on average 2.0407869481765837) internal successors, (4253), 2084 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 4253 transitions. [2021-08-21 18:51:58,526 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 4253 transitions. Word has length 26 [2021-08-21 18:51:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:58,527 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 4253 transitions. [2021-08-21 18:51:58,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 4253 transitions. [2021-08-21 18:51:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:58,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:58,531 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:58,558 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 18:51:58,744 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,SelfDestructingSolverStorable26 [2021-08-21 18:51:58,745 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1868241881, now seen corresponding path program 2 times [2021-08-21 18:51:58,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:58,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401307235] [2021-08-21 18:51:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:58,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:58,783 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 18:51:58,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:58,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401307235] [2021-08-21 18:51:58,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401307235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:58,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384834817] [2021-08-21 18:51:58,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:58,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:58,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:58,785 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 18:51:58,790 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 18:51:58,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:58,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:58,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:59,082 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 18:51:59,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384834817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:59,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:59,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:59,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659006782] [2021-08-21 18:51:59,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:59,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:59,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:59,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:59,083 INFO L87 Difference]: Start difference. First operand 2085 states and 4253 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:59,125 INFO L93 Difference]: Finished difference Result 2470 states and 4993 transitions. [2021-08-21 18:51:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:59,130 INFO L225 Difference]: With dead ends: 2470 [2021-08-21 18:51:59,130 INFO L226 Difference]: Without dead ends: 2463 [2021-08-21 18:51:59,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-21 18:51:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2105. [2021-08-21 18:51:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2105 states, 2104 states have (on average 2.050855513307985) internal successors, (4315), 2104 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 4315 transitions. [2021-08-21 18:51:59,157 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 4315 transitions. Word has length 26 [2021-08-21 18:51:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:59,157 INFO L470 AbstractCegarLoop]: Abstraction has 2105 states and 4315 transitions. [2021-08-21 18:51:59,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:59,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 4315 transitions. [2021-08-21 18:51:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:59,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:59,160 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:51:59,181 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 18:51:59,372 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,SelfDestructingSolverStorable27 [2021-08-21 18:51:59,373 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:51:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:51:59,373 INFO L82 PathProgramCache]: Analyzing trace with hash -31295003, now seen corresponding path program 2 times [2021-08-21 18:51:59,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:51:59,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096753258] [2021-08-21 18:51:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:51:59,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:51:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:51:59,417 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 18:51:59,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:51:59,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096753258] [2021-08-21 18:51:59,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096753258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:59,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352172462] [2021-08-21 18:51:59,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:51:59,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:51:59,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:51:59,418 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 18:51:59,433 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 18:51:59,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:51:59,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:51:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:51:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:51:59,708 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 18:51:59,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352172462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:51:59,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:51:59,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:51:59,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761842750] [2021-08-21 18:51:59,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:51:59,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:51:59,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:51:59,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:59,711 INFO L87 Difference]: Start difference. First operand 2105 states and 4315 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:51:59,765 INFO L93 Difference]: Finished difference Result 2453 states and 4992 transitions. [2021-08-21 18:51:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:51:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:51:59,769 INFO L225 Difference]: With dead ends: 2453 [2021-08-21 18:51:59,769 INFO L226 Difference]: Without dead ends: 2446 [2021-08-21 18:51:59,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:51:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-08-21 18:51:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2110. [2021-08-21 18:51:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2109 states have (on average 2.056899004267425) internal successors, (4338), 2109 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:51:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 4338 transitions. [2021-08-21 18:51:59,794 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 4338 transitions. Word has length 26 [2021-08-21 18:51:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:51:59,795 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 4338 transitions. [2021-08-21 18:51:59,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:51:59,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 4338 transitions. [2021-08-21 18:51:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:51:59,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:51:59,798 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] [2021-08-21 18:51:59,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:00,012 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,SelfDestructingSolverStorable28 [2021-08-21 18:52:00,012 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:00,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2061685037, now seen corresponding path program 1 times [2021-08-21 18:52:00,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:00,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660127296] [2021-08-21 18:52:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:00,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:00,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:00,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660127296] [2021-08-21 18:52:00,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660127296] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:00,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:00,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:00,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520462452] [2021-08-21 18:52:00,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:00,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:00,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:00,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:00,056 INFO L87 Difference]: Start difference. First operand 2110 states and 4338 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:00,102 INFO L93 Difference]: Finished difference Result 2532 states and 5104 transitions. [2021-08-21 18:52:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:00,106 INFO L225 Difference]: With dead ends: 2532 [2021-08-21 18:52:00,106 INFO L226 Difference]: Without dead ends: 2521 [2021-08-21 18:52:00,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-08-21 18:52:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2152. [2021-08-21 18:52:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 2.0548582054858207) internal successors, (4420), 2151 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 4420 transitions. [2021-08-21 18:52:00,131 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 4420 transitions. Word has length 26 [2021-08-21 18:52:00,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:00,131 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 4420 transitions. [2021-08-21 18:52:00,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 4420 transitions. [2021-08-21 18:52:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:00,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:00,138 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:00,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-21 18:52:00,139 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:00,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:00,139 INFO L82 PathProgramCache]: Analyzing trace with hash 302309421, now seen corresponding path program 1 times [2021-08-21 18:52:00,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:00,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258375661] [2021-08-21 18:52:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:00,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:00,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:00,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258375661] [2021-08-21 18:52:00,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258375661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:00,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:00,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:00,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491847283] [2021-08-21 18:52:00,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:00,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:00,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:00,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:00,182 INFO L87 Difference]: Start difference. First operand 2152 states and 4420 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:00,236 INFO L93 Difference]: Finished difference Result 2572 states and 5225 transitions. [2021-08-21 18:52:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:00,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:00,240 INFO L225 Difference]: With dead ends: 2572 [2021-08-21 18:52:00,240 INFO L226 Difference]: Without dead ends: 2565 [2021-08-21 18:52:00,240 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 18:52:00,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-08-21 18:52:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2167. [2021-08-21 18:52:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.065096952908587) internal successors, (4473), 2166 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 4473 transitions. [2021-08-21 18:52:00,264 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 4473 transitions. Word has length 26 [2021-08-21 18:52:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:00,264 INFO L470 AbstractCegarLoop]: Abstraction has 2167 states and 4473 transitions. [2021-08-21 18:52:00,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 4473 transitions. [2021-08-21 18:52:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:00,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:00,267 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] [2021-08-21 18:52:00,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-21 18:52:00,268 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1881139801, now seen corresponding path program 2 times [2021-08-21 18:52:00,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:00,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853657390] [2021-08-21 18:52:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:00,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:00,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:00,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853657390] [2021-08-21 18:52:00,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853657390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:00,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381331069] [2021-08-21 18:52:00,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:00,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:00,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:00,309 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:00,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:52:00,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:00,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:00,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:00,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381331069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:00,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:00,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:00,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431316527] [2021-08-21 18:52:00,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:00,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:00,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:00,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:00,681 INFO L87 Difference]: Start difference. First operand 2167 states and 4473 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:00,722 INFO L93 Difference]: Finished difference Result 2525 states and 5131 transitions. [2021-08-21 18:52:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:00,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:00,725 INFO L225 Difference]: With dead ends: 2525 [2021-08-21 18:52:00,725 INFO L226 Difference]: Without dead ends: 2518 [2021-08-21 18:52:00,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2021-08-21 18:52:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2195. [2021-08-21 18:52:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 2.0665451230628986) internal successors, (4534), 2194 states have internal predecessors, (4534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4534 transitions. [2021-08-21 18:52:00,750 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4534 transitions. Word has length 26 [2021-08-21 18:52:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:00,750 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 4534 transitions. [2021-08-21 18:52:00,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4534 transitions. [2021-08-21 18:52:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:00,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:00,753 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] [2021-08-21 18:52:00,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:00,964 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,SelfDestructingSolverStorable31 [2021-08-21 18:52:00,965 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash -558389671, now seen corresponding path program 1 times [2021-08-21 18:52:00,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:00,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118188046] [2021-08-21 18:52:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:00,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:01,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:01,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118188046] [2021-08-21 18:52:01,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118188046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:01,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:01,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:52:01,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080843403] [2021-08-21 18:52:01,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:01,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:01,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:01,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:01,005 INFO L87 Difference]: Start difference. First operand 2195 states and 4534 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:01,046 INFO L93 Difference]: Finished difference Result 2660 states and 5392 transitions. [2021-08-21 18:52:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:01,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:01,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:01,050 INFO L225 Difference]: With dead ends: 2660 [2021-08-21 18:52:01,050 INFO L226 Difference]: Without dead ends: 2649 [2021-08-21 18:52:01,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:01,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-08-21 18:52:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2214. [2021-08-21 18:52:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2213 states have (on average 2.071396294622684) internal successors, (4584), 2213 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 4584 transitions. [2021-08-21 18:52:01,075 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 4584 transitions. Word has length 26 [2021-08-21 18:52:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:01,075 INFO L470 AbstractCegarLoop]: Abstraction has 2214 states and 4584 transitions. [2021-08-21 18:52:01,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 4584 transitions. [2021-08-21 18:52:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:01,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:01,077 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] [2021-08-21 18:52:01,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-21 18:52:01,077 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:01,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:01,078 INFO L82 PathProgramCache]: Analyzing trace with hash -605749031, now seen corresponding path program 2 times [2021-08-21 18:52:01,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:01,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453338900] [2021-08-21 18:52:01,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:01,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:01,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:01,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453338900] [2021-08-21 18:52:01,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453338900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:01,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742627404] [2021-08-21 18:52:01,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:01,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:01,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:01,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:01,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:52:01,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:01,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:01,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742627404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:01,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:01,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:01,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001834130] [2021-08-21 18:52:01,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:01,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:01,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:01,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:01,456 INFO L87 Difference]: Start difference. First operand 2214 states and 4584 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:01,507 INFO L93 Difference]: Finished difference Result 2627 states and 5407 transitions. [2021-08-21 18:52:01,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:01,510 INFO L225 Difference]: With dead ends: 2627 [2021-08-21 18:52:01,510 INFO L226 Difference]: Without dead ends: 2620 [2021-08-21 18:52:01,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 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 18:52:01,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-08-21 18:52:01,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2234. [2021-08-21 18:52:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 2.090461262875056) internal successors, (4668), 2233 states have internal predecessors, (4668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 4668 transitions. [2021-08-21 18:52:01,533 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 4668 transitions. Word has length 26 [2021-08-21 18:52:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:01,533 INFO L470 AbstractCegarLoop]: Abstraction has 2234 states and 4668 transitions. [2021-08-21 18:52:01,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 4668 transitions. [2021-08-21 18:52:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:01,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:01,536 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:01,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:01,753 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,SelfDestructingSolverStorable33 [2021-08-21 18:52:01,753 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1360086997, now seen corresponding path program 2 times [2021-08-21 18:52:01,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:01,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423752471] [2021-08-21 18:52:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:01,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:01,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:01,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423752471] [2021-08-21 18:52:01,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423752471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:01,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329067656] [2021-08-21 18:52:01,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:01,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:01,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:01,786 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:01,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:52:01,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:01,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:01,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:01,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:02,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329067656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:02,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:02,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:02,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132097335] [2021-08-21 18:52:02,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:02,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:02,122 INFO L87 Difference]: Start difference. First operand 2234 states and 4668 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:02,175 INFO L93 Difference]: Finished difference Result 2661 states and 5516 transitions. [2021-08-21 18:52:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:02,178 INFO L225 Difference]: With dead ends: 2661 [2021-08-21 18:52:02,178 INFO L226 Difference]: Without dead ends: 2654 [2021-08-21 18:52:02,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 2 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 18:52:02,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-08-21 18:52:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2259. [2021-08-21 18:52:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.1054030115146145) internal successors, (4754), 2258 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:02,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 4754 transitions. [2021-08-21 18:52:02,201 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 4754 transitions. Word has length 26 [2021-08-21 18:52:02,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:02,201 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 4754 transitions. [2021-08-21 18:52:02,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:02,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 4754 transitions. [2021-08-21 18:52:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:02,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:02,204 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:02,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:02,416 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,SelfDestructingSolverStorable34 [2021-08-21 18:52:02,417 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:02,417 INFO L82 PathProgramCache]: Analyzing trace with hash -969044271, now seen corresponding path program 2 times [2021-08-21 18:52:02,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:02,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212158282] [2021-08-21 18:52:02,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:02,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:02,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:02,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212158282] [2021-08-21 18:52:02,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212158282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:02,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126963867] [2021-08-21 18:52:02,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:02,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:02,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:02,452 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:02,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:52:02,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:02,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:02,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:02,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126963867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:02,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:02,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:02,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562720710] [2021-08-21 18:52:02,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:02,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:02,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:02,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:02,793 INFO L87 Difference]: Start difference. First operand 2259 states and 4754 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:02,837 INFO L93 Difference]: Finished difference Result 2642 states and 5496 transitions. [2021-08-21 18:52:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:02,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:02,840 INFO L225 Difference]: With dead ends: 2642 [2021-08-21 18:52:02,840 INFO L226 Difference]: Without dead ends: 2635 [2021-08-21 18:52:02,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 18:52:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-08-21 18:52:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2269. [2021-08-21 18:52:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 2.1141975308641974) internal successors, (4795), 2268 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4795 transitions. [2021-08-21 18:52:02,862 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4795 transitions. Word has length 26 [2021-08-21 18:52:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:02,863 INFO L470 AbstractCegarLoop]: Abstraction has 2269 states and 4795 transitions. [2021-08-21 18:52:02,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4795 transitions. [2021-08-21 18:52:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:52:02,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:02,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:02,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:03,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:03,066 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:03,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:03,066 INFO L82 PathProgramCache]: Analyzing trace with hash 996791757, now seen corresponding path program 2 times [2021-08-21 18:52:03,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:03,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592446398] [2021-08-21 18:52:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:03,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:03,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:03,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592446398] [2021-08-21 18:52:03,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592446398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:03,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232282825] [2021-08-21 18:52:03,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:03,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:03,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:03,107 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:52:03,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:52:03,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:03,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:03,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 18:52:03,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:03,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232282825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:03,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:03,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 18:52:03,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451887406] [2021-08-21 18:52:03,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:52:03,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:52:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:52:03,502 INFO L87 Difference]: Start difference. First operand 2269 states and 4795 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:03,549 INFO L93 Difference]: Finished difference Result 2676 states and 5581 transitions. [2021-08-21 18:52:03,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:52:03,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:03,553 INFO L225 Difference]: With dead ends: 2676 [2021-08-21 18:52:03,553 INFO L226 Difference]: Without dead ends: 2669 [2021-08-21 18:52:03,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 18:52:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2021-08-21 18:52:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2284. [2021-08-21 18:52:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.1235216819973717) internal successors, (4848), 2283 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 4848 transitions. [2021-08-21 18:52:03,576 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 4848 transitions. Word has length 26 [2021-08-21 18:52:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:03,577 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 4848 transitions. [2021-08-21 18:52:03,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 4 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 18:52:03,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 4848 transitions. [2021-08-21 18:52:03,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:03,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:03,579 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:03,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:03,792 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,SelfDestructingSolverStorable36 [2021-08-21 18:52:03,793 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:03,793 INFO L82 PathProgramCache]: Analyzing trace with hash 804719517, now seen corresponding path program 1 times [2021-08-21 18:52:03,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:03,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208677191] [2021-08-21 18:52:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:03,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:03,841 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 18:52:03,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:03,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208677191] [2021-08-21 18:52:03,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208677191] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:03,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:03,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:03,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455070199] [2021-08-21 18:52:03,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:03,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:03,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:03,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:03,843 INFO L87 Difference]: Start difference. First operand 2284 states and 4848 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:03,902 INFO L93 Difference]: Finished difference Result 2858 states and 5954 transitions. [2021-08-21 18:52:03,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:03,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:03,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:03,906 INFO L225 Difference]: With dead ends: 2858 [2021-08-21 18:52:03,906 INFO L226 Difference]: Without dead ends: 2851 [2021-08-21 18:52:03,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-08-21 18:52:03,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2261. [2021-08-21 18:52:03,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 2260 states have (on average 2.098672566371681) internal successors, (4743), 2260 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 4743 transitions. [2021-08-21 18:52:03,927 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 4743 transitions. Word has length 29 [2021-08-21 18:52:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:03,927 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 4743 transitions. [2021-08-21 18:52:03,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 4743 transitions. [2021-08-21 18:52:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:03,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:03,930 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:03,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-21 18:52:03,930 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:03,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:03,930 INFO L82 PathProgramCache]: Analyzing trace with hash -10796975, now seen corresponding path program 1 times [2021-08-21 18:52:03,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:03,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763376701] [2021-08-21 18:52:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:03,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:03,983 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 18:52:03,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:03,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763376701] [2021-08-21 18:52:03,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763376701] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:03,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:03,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:03,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448164875] [2021-08-21 18:52:03,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:03,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:03,984 INFO L87 Difference]: Start difference. First operand 2261 states and 4743 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:04,039 INFO L93 Difference]: Finished difference Result 2834 states and 5858 transitions. [2021-08-21 18:52:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:04,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:04,042 INFO L225 Difference]: With dead ends: 2834 [2021-08-21 18:52:04,042 INFO L226 Difference]: Without dead ends: 2827 [2021-08-21 18:52:04,043 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 18:52:04,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2021-08-21 18:52:04,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2286. [2021-08-21 18:52:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 2.1037199124726476) internal successors, (4807), 2285 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4807 transitions. [2021-08-21 18:52:04,064 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4807 transitions. Word has length 29 [2021-08-21 18:52:04,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:04,064 INFO L470 AbstractCegarLoop]: Abstraction has 2286 states and 4807 transitions. [2021-08-21 18:52:04,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4807 transitions. [2021-08-21 18:52:04,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:04,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:04,067 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:04,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-08-21 18:52:04,067 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:04,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:04,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1702644645, now seen corresponding path program 1 times [2021-08-21 18:52:04,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:04,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661155997] [2021-08-21 18:52:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:04,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:04,113 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 18:52:04,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:04,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661155997] [2021-08-21 18:52:04,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661155997] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:04,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:04,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:04,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736562115] [2021-08-21 18:52:04,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:04,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:04,114 INFO L87 Difference]: Start difference. First operand 2286 states and 4807 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:04,168 INFO L93 Difference]: Finished difference Result 2871 states and 5912 transitions. [2021-08-21 18:52:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:04,173 INFO L225 Difference]: With dead ends: 2871 [2021-08-21 18:52:04,173 INFO L226 Difference]: Without dead ends: 2860 [2021-08-21 18:52:04,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-08-21 18:52:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2306. [2021-08-21 18:52:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 2.1093275488069416) internal successors, (4862), 2305 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 4862 transitions. [2021-08-21 18:52:04,197 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 4862 transitions. Word has length 29 [2021-08-21 18:52:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:04,198 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 4862 transitions. [2021-08-21 18:52:04,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 4862 transitions. [2021-08-21 18:52:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:04,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:04,200 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:04,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-08-21 18:52:04,200 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash -56730971, now seen corresponding path program 1 times [2021-08-21 18:52:04,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:04,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716034253] [2021-08-21 18:52:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:04,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:04,245 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 18:52:04,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:04,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716034253] [2021-08-21 18:52:04,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716034253] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:04,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:04,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:04,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813409178] [2021-08-21 18:52:04,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:04,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:04,246 INFO L87 Difference]: Start difference. First operand 2306 states and 4862 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:04,313 INFO L93 Difference]: Finished difference Result 2887 states and 5957 transitions. [2021-08-21 18:52:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:04,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:04,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:04,317 INFO L225 Difference]: With dead ends: 2887 [2021-08-21 18:52:04,317 INFO L226 Difference]: Without dead ends: 2880 [2021-08-21 18:52:04,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-08-21 18:52:04,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2303. [2021-08-21 18:52:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.08992180712424) internal successors, (4811), 2302 states have internal predecessors, (4811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 4811 transitions. [2021-08-21 18:52:04,341 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 4811 transitions. Word has length 29 [2021-08-21 18:52:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:04,341 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 4811 transitions. [2021-08-21 18:52:04,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 4811 transitions. [2021-08-21 18:52:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:04,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:04,344 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] [2021-08-21 18:52:04,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-08-21 18:52:04,344 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:04,344 INFO L82 PathProgramCache]: Analyzing trace with hash -490012651, now seen corresponding path program 3 times [2021-08-21 18:52:04,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:04,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41399304] [2021-08-21 18:52:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:04,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:04,383 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 18:52:04,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:04,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41399304] [2021-08-21 18:52:04,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41399304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:04,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206893586] [2021-08-21 18:52:04,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:04,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:04,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:04,385 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 18:52:04,412 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 18:52:04,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:52:04,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:04,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:04,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:04,789 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 18:52:04,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206893586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:04,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:04,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:04,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806257352] [2021-08-21 18:52:04,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:04,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:04,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:04,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:04,790 INFO L87 Difference]: Start difference. First operand 2303 states and 4811 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:04,850 INFO L93 Difference]: Finished difference Result 2842 states and 5825 transitions. [2021-08-21 18:52:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:04,853 INFO L225 Difference]: With dead ends: 2842 [2021-08-21 18:52:04,853 INFO L226 Difference]: Without dead ends: 2835 [2021-08-21 18:52:04,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2021-08-21 18:52:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2323. [2021-08-21 18:52:04,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 2.0925925925925926) internal successors, (4859), 2322 states have internal predecessors, (4859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 4859 transitions. [2021-08-21 18:52:04,876 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 4859 transitions. Word has length 29 [2021-08-21 18:52:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:04,876 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 4859 transitions. [2021-08-21 18:52:04,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 4859 transitions. [2021-08-21 18:52:04,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:04,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:04,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:04,897 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 18:52:05,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:05,096 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:05,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:05,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1462949223, now seen corresponding path program 2 times [2021-08-21 18:52:05,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:05,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129013553] [2021-08-21 18:52:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:05,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:05,143 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 18:52:05,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:05,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129013553] [2021-08-21 18:52:05,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129013553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:05,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554752609] [2021-08-21 18:52:05,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:05,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:05,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:05,144 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 18:52:05,146 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 18:52:05,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:05,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:05,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:05,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554752609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:05,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:05,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:05,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098968380] [2021-08-21 18:52:05,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:05,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:05,568 INFO L87 Difference]: Start difference. First operand 2323 states and 4859 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:05,631 INFO L93 Difference]: Finished difference Result 2897 states and 6029 transitions. [2021-08-21 18:52:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:05,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:05,634 INFO L225 Difference]: With dead ends: 2897 [2021-08-21 18:52:05,634 INFO L226 Difference]: Without dead ends: 2890 [2021-08-21 18:52:05,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2021-08-21 18:52:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 2362. [2021-08-21 18:52:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 2.1084286319356207) internal successors, (4978), 2361 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 4978 transitions. [2021-08-21 18:52:05,658 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 4978 transitions. Word has length 29 [2021-08-21 18:52:05,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:05,659 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 4978 transitions. [2021-08-21 18:52:05,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 4978 transitions. [2021-08-21 18:52:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:05,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:05,661 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] [2021-08-21 18:52:05,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:05,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:05,865 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:05,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:05,865 INFO L82 PathProgramCache]: Analyzing trace with hash 879079965, now seen corresponding path program 3 times [2021-08-21 18:52:05,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:05,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343780172] [2021-08-21 18:52:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:05,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:05,932 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 18:52:05,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:05,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343780172] [2021-08-21 18:52:05,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343780172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:05,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762110607] [2021-08-21 18:52:05,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:05,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:05,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:05,934 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 18:52:05,937 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 18:52:06,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:52:06,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:06,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:06,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:06,380 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 18:52:06,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762110607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:06,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:06,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:06,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193053724] [2021-08-21 18:52:06,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:06,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:06,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:06,381 INFO L87 Difference]: Start difference. First operand 2362 states and 4978 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:06,441 INFO L93 Difference]: Finished difference Result 2923 states and 6088 transitions. [2021-08-21 18:52:06,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:06,441 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:06,445 INFO L225 Difference]: With dead ends: 2923 [2021-08-21 18:52:06,445 INFO L226 Difference]: Without dead ends: 2916 [2021-08-21 18:52:06,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-08-21 18:52:06,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2378. [2021-08-21 18:52:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.1060159865376527) internal successors, (5006), 2377 states have internal predecessors, (5006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 5006 transitions. [2021-08-21 18:52:06,468 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 5006 transitions. Word has length 29 [2021-08-21 18:52:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:06,468 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 5006 transitions. [2021-08-21 18:52:06,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 5006 transitions. [2021-08-21 18:52:06,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:06,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:06,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:06,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 18:52:06,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:06,671 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:06,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:06,671 INFO L82 PathProgramCache]: Analyzing trace with hash -265170103, now seen corresponding path program 1 times [2021-08-21 18:52:06,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:06,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126257014] [2021-08-21 18:52:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:06,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:06,715 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 18:52:06,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:06,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126257014] [2021-08-21 18:52:06,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126257014] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:06,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:06,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:06,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189070742] [2021-08-21 18:52:06,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:06,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:06,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:06,717 INFO L87 Difference]: Start difference. First operand 2378 states and 5006 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:06,796 INFO L93 Difference]: Finished difference Result 2979 states and 6196 transitions. [2021-08-21 18:52:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:06,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:06,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:06,801 INFO L225 Difference]: With dead ends: 2979 [2021-08-21 18:52:06,801 INFO L226 Difference]: Without dead ends: 2972 [2021-08-21 18:52:06,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-08-21 18:52:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2412. [2021-08-21 18:52:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.11862297801742) internal successors, (5108), 2411 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5108 transitions. [2021-08-21 18:52:06,825 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5108 transitions. Word has length 29 [2021-08-21 18:52:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:06,825 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 5108 transitions. [2021-08-21 18:52:06,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5108 transitions. [2021-08-21 18:52:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:06,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:06,828 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:06,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-08-21 18:52:06,828 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1448271517, now seen corresponding path program 1 times [2021-08-21 18:52:06,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:06,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8345306] [2021-08-21 18:52:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:06,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:06,878 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 18:52:06,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:06,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8345306] [2021-08-21 18:52:06,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8345306] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:06,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:06,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:06,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001018740] [2021-08-21 18:52:06,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:06,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:06,879 INFO L87 Difference]: Start difference. First operand 2412 states and 5108 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:06,940 INFO L93 Difference]: Finished difference Result 3054 states and 6324 transitions. [2021-08-21 18:52:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:06,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:06,943 INFO L225 Difference]: With dead ends: 3054 [2021-08-21 18:52:06,943 INFO L226 Difference]: Without dead ends: 3043 [2021-08-21 18:52:06,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3043 states. [2021-08-21 18:52:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3043 to 2451. [2021-08-21 18:52:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2450 states have (on average 2.1146938775510202) internal successors, (5181), 2450 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 5181 transitions. [2021-08-21 18:52:06,967 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 5181 transitions. Word has length 29 [2021-08-21 18:52:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:06,967 INFO L470 AbstractCegarLoop]: Abstraction has 2451 states and 5181 transitions. [2021-08-21 18:52:06,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:06,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 5181 transitions. [2021-08-21 18:52:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:06,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:06,970 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:06,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-08-21 18:52:06,970 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:06,971 INFO L82 PathProgramCache]: Analyzing trace with hash -311104099, now seen corresponding path program 1 times [2021-08-21 18:52:06,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:06,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475573954] [2021-08-21 18:52:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:06,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:07,013 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 18:52:07,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:07,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475573954] [2021-08-21 18:52:07,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475573954] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:07,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:07,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:07,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610454579] [2021-08-21 18:52:07,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:07,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:07,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:07,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:07,014 INFO L87 Difference]: Start difference. First operand 2451 states and 5181 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:07,099 INFO L93 Difference]: Finished difference Result 3098 states and 6463 transitions. [2021-08-21 18:52:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:07,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:07,103 INFO L225 Difference]: With dead ends: 3098 [2021-08-21 18:52:07,103 INFO L226 Difference]: Without dead ends: 3091 [2021-08-21 18:52:07,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-08-21 18:52:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2507. [2021-08-21 18:52:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2506 states have (on average 2.118515562649641) internal successors, (5309), 2506 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 5309 transitions. [2021-08-21 18:52:07,128 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 5309 transitions. Word has length 29 [2021-08-21 18:52:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:07,128 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 5309 transitions. [2021-08-21 18:52:07,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 5309 transitions. [2021-08-21 18:52:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:07,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:07,131 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] [2021-08-21 18:52:07,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-08-21 18:52:07,131 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:07,132 INFO L82 PathProgramCache]: Analyzing trace with hash 489988885, now seen corresponding path program 2 times [2021-08-21 18:52:07,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:07,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165166081] [2021-08-21 18:52:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:07,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:07,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:07,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165166081] [2021-08-21 18:52:07,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165166081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:07,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942179082] [2021-08-21 18:52:07,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:07,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:07,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:07,171 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 18:52:07,173 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 18:52:07,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:07,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:07,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:07,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942179082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:07,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:07,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:07,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106198689] [2021-08-21 18:52:07,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:07,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:07,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:07,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:07,642 INFO L87 Difference]: Start difference. First operand 2507 states and 5309 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:07,706 INFO L93 Difference]: Finished difference Result 3087 states and 6436 transitions. [2021-08-21 18:52:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:07,709 INFO L225 Difference]: With dead ends: 3087 [2021-08-21 18:52:07,710 INFO L226 Difference]: Without dead ends: 3080 [2021-08-21 18:52:07,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:07,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3080 states. [2021-08-21 18:52:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3080 to 2523. [2021-08-21 18:52:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 2.1161776367961935) internal successors, (5337), 2522 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 5337 transitions. [2021-08-21 18:52:07,746 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 5337 transitions. Word has length 29 [2021-08-21 18:52:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:07,746 INFO L470 AbstractCegarLoop]: Abstraction has 2523 states and 5337 transitions. [2021-08-21 18:52:07,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 5337 transitions. [2021-08-21 18:52:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:07,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:07,749 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:07,769 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 18:52:07,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:07,969 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1563307277, now seen corresponding path program 2 times [2021-08-21 18:52:07,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:07,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053252085] [2021-08-21 18:52:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:07,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:08,014 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 18:52:08,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:08,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053252085] [2021-08-21 18:52:08,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053252085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:08,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26483744] [2021-08-21 18:52:08,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:08,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:08,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:08,018 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 18:52:08,021 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 18:52:08,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:08,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:08,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:08,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:08,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26483744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:08,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:08,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:08,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477154356] [2021-08-21 18:52:08,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:08,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:08,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:08,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:08,461 INFO L87 Difference]: Start difference. First operand 2523 states and 5337 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:08,513 INFO L93 Difference]: Finished difference Result 3072 states and 6376 transitions. [2021-08-21 18:52:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:08,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:08,517 INFO L225 Difference]: With dead ends: 3072 [2021-08-21 18:52:08,517 INFO L226 Difference]: Without dead ends: 3065 [2021-08-21 18:52:08,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2021-08-21 18:52:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2539. [2021-08-21 18:52:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2538 states have (on average 2.120173364854216) internal successors, (5381), 2538 states have internal predecessors, (5381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 5381 transitions. [2021-08-21 18:52:08,555 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 5381 transitions. Word has length 29 [2021-08-21 18:52:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:08,556 INFO L470 AbstractCegarLoop]: Abstraction has 2539 states and 5381 transitions. [2021-08-21 18:52:08,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 5381 transitions. [2021-08-21 18:52:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:08,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:08,559 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] [2021-08-21 18:52:08,576 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 18:52:08,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 18:52:08,760 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:08,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash -470738427, now seen corresponding path program 2 times [2021-08-21 18:52:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:08,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090919976] [2021-08-21 18:52:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:08,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:08,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:08,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090919976] [2021-08-21 18:52:08,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090919976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:08,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104832692] [2021-08-21 18:52:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:08,810 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:08,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:08,813 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 18:52:08,814 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 18:52:09,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:09,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:09,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:09,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:09,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104832692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:09,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:09,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:09,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919869116] [2021-08-21 18:52:09,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:09,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:09,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:09,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:09,365 INFO L87 Difference]: Start difference. First operand 2539 states and 5381 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:09,431 INFO L93 Difference]: Finished difference Result 3077 states and 6421 transitions. [2021-08-21 18:52:09,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:09,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:09,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:09,435 INFO L225 Difference]: With dead ends: 3077 [2021-08-21 18:52:09,436 INFO L226 Difference]: Without dead ends: 3070 [2021-08-21 18:52:09,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-08-21 18:52:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2547. [2021-08-21 18:52:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 2.121366849960723) internal successors, (5401), 2546 states have internal predecessors, (5401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 5401 transitions. [2021-08-21 18:52:09,474 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 5401 transitions. Word has length 29 [2021-08-21 18:52:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:09,474 INFO L470 AbstractCegarLoop]: Abstraction has 2547 states and 5401 transitions. [2021-08-21 18:52:09,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 5401 transitions. [2021-08-21 18:52:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:09,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:09,477 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] [2021-08-21 18:52:09,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 18:52:09,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:52:09,678 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:09,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:09,678 INFO L82 PathProgramCache]: Analyzing trace with hash -663481831, now seen corresponding path program 2 times [2021-08-21 18:52:09,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:09,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879139066] [2021-08-21 18:52:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:09,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:09,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:09,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879139066] [2021-08-21 18:52:09,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879139066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:09,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353473314] [2021-08-21 18:52:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:09,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:09,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:09,729 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 18:52:09,730 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 18:52:10,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:10,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:10,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:10,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353473314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:10,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:10,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:10,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174922360] [2021-08-21 18:52:10,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:10,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:10,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:10,214 INFO L87 Difference]: Start difference. First operand 2547 states and 5401 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:10,290 INFO L93 Difference]: Finished difference Result 3062 states and 6380 transitions. [2021-08-21 18:52:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:10,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:10,295 INFO L225 Difference]: With dead ends: 3062 [2021-08-21 18:52:10,295 INFO L226 Difference]: Without dead ends: 3055 [2021-08-21 18:52:10,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-08-21 18:52:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2544. [2021-08-21 18:52:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2543 states have (on average 2.113252064490759) internal successors, (5374), 2543 states have internal predecessors, (5374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 5374 transitions. [2021-08-21 18:52:10,351 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 5374 transitions. Word has length 29 [2021-08-21 18:52:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:10,352 INFO L470 AbstractCegarLoop]: Abstraction has 2544 states and 5374 transitions. [2021-08-21 18:52:10,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 5374 transitions. [2021-08-21 18:52:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:10,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:10,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:10,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:10,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:10,565 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash 933471777, now seen corresponding path program 2 times [2021-08-21 18:52:10,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:10,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029648488] [2021-08-21 18:52:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:10,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:10,613 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 18:52:10,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:10,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029648488] [2021-08-21 18:52:10,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029648488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:10,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97456038] [2021-08-21 18:52:10,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:10,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:10,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:10,614 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 18:52:10,621 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 18:52:11,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:11,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:11,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:11,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:11,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97456038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:11,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:11,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:11,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610400720] [2021-08-21 18:52:11,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:11,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:11,174 INFO L87 Difference]: Start difference. First operand 2544 states and 5374 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:11,238 INFO L93 Difference]: Finished difference Result 3042 states and 6323 transitions. [2021-08-21 18:52:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:11,241 INFO L225 Difference]: With dead ends: 3042 [2021-08-21 18:52:11,241 INFO L226 Difference]: Without dead ends: 3035 [2021-08-21 18:52:11,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2021-08-21 18:52:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2535. [2021-08-21 18:52:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 2534 states have (on average 2.1002367797947907) internal successors, (5322), 2534 states have internal predecessors, (5322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 5322 transitions. [2021-08-21 18:52:11,266 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 5322 transitions. Word has length 29 [2021-08-21 18:52:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:11,266 INFO L470 AbstractCegarLoop]: Abstraction has 2535 states and 5322 transitions. [2021-08-21 18:52:11,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 5322 transitions. [2021-08-21 18:52:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:11,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:11,268 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:11,285 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 18:52:11,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:11,469 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:11,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1268515479, now seen corresponding path program 1 times [2021-08-21 18:52:11,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:11,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553133272] [2021-08-21 18:52:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:11,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:11,521 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 18:52:11,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:11,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553133272] [2021-08-21 18:52:11,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553133272] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:11,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:11,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:11,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918703570] [2021-08-21 18:52:11,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:11,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:11,522 INFO L87 Difference]: Start difference. First operand 2535 states and 5322 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:11,576 INFO L93 Difference]: Finished difference Result 3132 states and 6448 transitions. [2021-08-21 18:52:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:11,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:11,580 INFO L225 Difference]: With dead ends: 3132 [2021-08-21 18:52:11,580 INFO L226 Difference]: Without dead ends: 3121 [2021-08-21 18:52:11,580 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 18:52:11,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-08-21 18:52:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2589. [2021-08-21 18:52:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 2.1000772797527048) internal successors, (5435), 2588 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 5435 transitions. [2021-08-21 18:52:11,604 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 5435 transitions. Word has length 29 [2021-08-21 18:52:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:11,604 INFO L470 AbstractCegarLoop]: Abstraction has 2589 states and 5435 transitions. [2021-08-21 18:52:11,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 5435 transitions. [2021-08-21 18:52:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:11,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:11,607 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:11,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-08-21 18:52:11,607 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1267076201, now seen corresponding path program 1 times [2021-08-21 18:52:11,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:11,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339042609] [2021-08-21 18:52:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:11,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:11,652 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 18:52:11,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:11,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339042609] [2021-08-21 18:52:11,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339042609] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:11,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:11,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:11,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107720292] [2021-08-21 18:52:11,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:11,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:11,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:11,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:11,653 INFO L87 Difference]: Start difference. First operand 2589 states and 5435 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:11,708 INFO L93 Difference]: Finished difference Result 3180 states and 6560 transitions. [2021-08-21 18:52:11,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:11,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:11,711 INFO L225 Difference]: With dead ends: 3180 [2021-08-21 18:52:11,712 INFO L226 Difference]: Without dead ends: 3173 [2021-08-21 18:52:11,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3173 states. [2021-08-21 18:52:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3173 to 2609. [2021-08-21 18:52:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.107745398773006) internal successors, (5497), 2608 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 5497 transitions. [2021-08-21 18:52:11,736 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 5497 transitions. Word has length 29 [2021-08-21 18:52:11,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:11,736 INFO L470 AbstractCegarLoop]: Abstraction has 2609 states and 5497 transitions. [2021-08-21 18:52:11,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 5497 transitions. [2021-08-21 18:52:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:11,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:11,739 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:11,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-08-21 18:52:11,739 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:11,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1449060715, now seen corresponding path program 2 times [2021-08-21 18:52:11,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:11,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805996057] [2021-08-21 18:52:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:11,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:11,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:11,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805996057] [2021-08-21 18:52:11,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805996057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:11,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667559302] [2021-08-21 18:52:11,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:11,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:11,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:11,781 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 18:52:11,816 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 18:52:12,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:12,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:12,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:12,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667559302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:12,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:12,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:12,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080506655] [2021-08-21 18:52:12,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:12,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:12,383 INFO L87 Difference]: Start difference. First operand 2609 states and 5497 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:12,449 INFO L93 Difference]: Finished difference Result 3108 states and 6416 transitions. [2021-08-21 18:52:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:12,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:12,453 INFO L225 Difference]: With dead ends: 3108 [2021-08-21 18:52:12,453 INFO L226 Difference]: Without dead ends: 3101 [2021-08-21 18:52:12,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:12,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-08-21 18:52:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2626. [2021-08-21 18:52:12,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 2.1013333333333333) internal successors, (5516), 2625 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 5516 transitions. [2021-08-21 18:52:12,476 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 5516 transitions. Word has length 29 [2021-08-21 18:52:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:12,477 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 5516 transitions. [2021-08-21 18:52:12,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 5516 transitions. [2021-08-21 18:52:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:12,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:12,479 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:12,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:12,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:12,680 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:12,680 INFO L82 PathProgramCache]: Analyzing trace with hash 406377109, now seen corresponding path program 1 times [2021-08-21 18:52:12,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:12,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745322914] [2021-08-21 18:52:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:12,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:12,725 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 18:52:12,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:12,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745322914] [2021-08-21 18:52:12,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745322914] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:12,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:12,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:12,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409491354] [2021-08-21 18:52:12,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:12,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:12,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:12,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:12,726 INFO L87 Difference]: Start difference. First operand 2626 states and 5516 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:12,778 INFO L93 Difference]: Finished difference Result 3261 states and 6687 transitions. [2021-08-21 18:52:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:12,782 INFO L225 Difference]: With dead ends: 3261 [2021-08-21 18:52:12,782 INFO L226 Difference]: Without dead ends: 3250 [2021-08-21 18:52:12,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-08-21 18:52:12,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 2630. [2021-08-21 18:52:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 2.092810954735641) internal successors, (5502), 2629 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 5502 transitions. [2021-08-21 18:52:12,806 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 5502 transitions. Word has length 29 [2021-08-21 18:52:12,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:12,806 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 5502 transitions. [2021-08-21 18:52:12,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 5502 transitions. [2021-08-21 18:52:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:12,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:12,809 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:12,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-08-21 18:52:12,809 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:12,809 INFO L82 PathProgramCache]: Analyzing trace with hash 359017749, now seen corresponding path program 2 times [2021-08-21 18:52:12,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:12,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572085594] [2021-08-21 18:52:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:12,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:12,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:12,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572085594] [2021-08-21 18:52:12,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572085594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:12,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336454400] [2021-08-21 18:52:12,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:12,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:12,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:12,857 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 18:52:12,898 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 18:52:13,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:13,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:13,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:13,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:13,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336454400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:13,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:13,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:13,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546975137] [2021-08-21 18:52:13,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:13,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:13,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:13,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:13,428 INFO L87 Difference]: Start difference. First operand 2630 states and 5502 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:13,495 INFO L93 Difference]: Finished difference Result 3210 states and 6612 transitions. [2021-08-21 18:52:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:13,498 INFO L225 Difference]: With dead ends: 3210 [2021-08-21 18:52:13,499 INFO L226 Difference]: Without dead ends: 3203 [2021-08-21 18:52:13,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-08-21 18:52:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2646. [2021-08-21 18:52:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2645 states have (on average 2.0937618147448016) internal successors, (5538), 2645 states have internal predecessors, (5538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 5538 transitions. [2021-08-21 18:52:13,524 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 5538 transitions. Word has length 29 [2021-08-21 18:52:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:13,524 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 5538 transitions. [2021-08-21 18:52:13,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 5538 transitions. [2021-08-21 18:52:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:13,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:13,527 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] [2021-08-21 18:52:13,546 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 18:52:13,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 18:52:13,730 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:13,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:13,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1970113519, now seen corresponding path program 3 times [2021-08-21 18:52:13,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:13,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580607589] [2021-08-21 18:52:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:13,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:13,771 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 18:52:13,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:13,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580607589] [2021-08-21 18:52:13,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580607589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:13,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468376121] [2021-08-21 18:52:13,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:13,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:13,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:13,773 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 18:52:13,794 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 18:52:14,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:52:14,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:14,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:14,379 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 18:52:14,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468376121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:14,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:14,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:14,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061045258] [2021-08-21 18:52:14,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:14,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:14,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:14,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:14,380 INFO L87 Difference]: Start difference. First operand 2646 states and 5538 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:14,437 INFO L93 Difference]: Finished difference Result 3241 states and 6669 transitions. [2021-08-21 18:52:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:14,442 INFO L225 Difference]: With dead ends: 3241 [2021-08-21 18:52:14,442 INFO L226 Difference]: Without dead ends: 3234 [2021-08-21 18:52:14,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-08-21 18:52:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2666. [2021-08-21 18:52:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.0930581613508443) internal successors, (5578), 2665 states have internal predecessors, (5578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:14,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 5578 transitions. [2021-08-21 18:52:14,470 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 5578 transitions. Word has length 29 [2021-08-21 18:52:14,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:14,470 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 5578 transitions. [2021-08-21 18:52:14,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 5578 transitions. [2021-08-21 18:52:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:14,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:14,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:14,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 18:52:14,674 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,SelfDestructingSolverStorable57 [2021-08-21 18:52:14,674 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:14,674 INFO L82 PathProgramCache]: Analyzing trace with hash -4277491, now seen corresponding path program 2 times [2021-08-21 18:52:14,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:14,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854660331] [2021-08-21 18:52:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:14,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:14,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:14,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854660331] [2021-08-21 18:52:14,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854660331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:14,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390139799] [2021-08-21 18:52:14,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:14,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:14,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:14,721 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 18:52:14,721 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 18:52:15,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:15,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:15,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:15,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390139799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:15,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:15,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:15,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385089169] [2021-08-21 18:52:15,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:15,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:15,296 INFO L87 Difference]: Start difference. First operand 2666 states and 5578 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:15,357 INFO L93 Difference]: Finished difference Result 3187 states and 6561 transitions. [2021-08-21 18:52:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:15,361 INFO L225 Difference]: With dead ends: 3187 [2021-08-21 18:52:15,361 INFO L226 Difference]: Without dead ends: 3180 [2021-08-21 18:52:15,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-08-21 18:52:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2674. [2021-08-21 18:52:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 2.0957725402169847) internal successors, (5602), 2673 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 5602 transitions. [2021-08-21 18:52:15,391 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 5602 transitions. Word has length 29 [2021-08-21 18:52:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:15,391 INFO L470 AbstractCegarLoop]: Abstraction has 2674 states and 5602 transitions. [2021-08-21 18:52:15,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 5602 transitions. [2021-08-21 18:52:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:15,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:15,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:15,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:15,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 18:52:15,596 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1961558537, now seen corresponding path program 2 times [2021-08-21 18:52:15,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:15,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075553779] [2021-08-21 18:52:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:15,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:15,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:15,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075553779] [2021-08-21 18:52:15,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075553779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:15,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490908952] [2021-08-21 18:52:15,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:15,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:15,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:15,642 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 18:52:15,664 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 18:52:16,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:16,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:16,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:16,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:16,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490908952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:16,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:16,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:16,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408079095] [2021-08-21 18:52:16,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:16,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:16,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:16,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:16,227 INFO L87 Difference]: Start difference. First operand 2674 states and 5602 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:16,294 INFO L93 Difference]: Finished difference Result 3226 states and 6639 transitions. [2021-08-21 18:52:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:16,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:16,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:16,299 INFO L225 Difference]: With dead ends: 3226 [2021-08-21 18:52:16,299 INFO L226 Difference]: Without dead ends: 3219 [2021-08-21 18:52:16,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2021-08-21 18:52:16,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 2664. [2021-08-21 18:52:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2663 states have (on average 2.076980848666917) internal successors, (5531), 2663 states have internal predecessors, (5531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 5531 transitions. [2021-08-21 18:52:16,326 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 5531 transitions. Word has length 29 [2021-08-21 18:52:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:16,327 INFO L470 AbstractCegarLoop]: Abstraction has 2664 states and 5531 transitions. [2021-08-21 18:52:16,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 5531 transitions. [2021-08-21 18:52:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:16,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:16,330 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] [2021-08-21 18:52:16,350 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 18:52:16,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:16,534 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:16,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1695615551, now seen corresponding path program 3 times [2021-08-21 18:52:16,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:16,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276915033] [2021-08-21 18:52:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:16,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:16,574 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 18:52:16,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:16,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276915033] [2021-08-21 18:52:16,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276915033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:16,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087006588] [2021-08-21 18:52:16,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:16,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:16,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:16,575 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 18:52:16,588 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 18:52:17,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:52:17,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:17,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:17,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:17,200 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 18:52:17,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087006588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:17,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:17,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:17,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711532225] [2021-08-21 18:52:17,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:17,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:17,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:17,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:17,201 INFO L87 Difference]: Start difference. First operand 2664 states and 5531 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:17,266 INFO L93 Difference]: Finished difference Result 3318 states and 6996 transitions. [2021-08-21 18:52:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:17,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:17,270 INFO L225 Difference]: With dead ends: 3318 [2021-08-21 18:52:17,270 INFO L226 Difference]: Without dead ends: 3311 [2021-08-21 18:52:17,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-08-21 18:52:17,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2761. [2021-08-21 18:52:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2761 states, 2760 states have (on average 2.152536231884058) internal successors, (5941), 2760 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2761 states to 2761 states and 5941 transitions. [2021-08-21 18:52:17,303 INFO L78 Accepts]: Start accepts. Automaton has 2761 states and 5941 transitions. Word has length 29 [2021-08-21 18:52:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:17,303 INFO L470 AbstractCegarLoop]: Abstraction has 2761 states and 5941 transitions. [2021-08-21 18:52:17,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2761 states and 5941 transitions. [2021-08-21 18:52:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:17,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:17,306 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] [2021-08-21 18:52:17,325 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 18:52:17,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:17,507 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:17,507 INFO L82 PathProgramCache]: Analyzing trace with hash 646413637, now seen corresponding path program 3 times [2021-08-21 18:52:17,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:17,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800556053] [2021-08-21 18:52:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:17,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:17,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:17,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800556053] [2021-08-21 18:52:17,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800556053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:17,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866608129] [2021-08-21 18:52:17,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:17,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:17,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:17,548 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 18:52:17,568 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 18:52:18,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:52:18,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:18,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:18,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866608129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:18,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:18,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:18,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737983610] [2021-08-21 18:52:18,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:18,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:18,158 INFO L87 Difference]: Start difference. First operand 2761 states and 5941 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:18,218 INFO L93 Difference]: Finished difference Result 3384 states and 7228 transitions. [2021-08-21 18:52:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:18,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:18,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:18,223 INFO L225 Difference]: With dead ends: 3384 [2021-08-21 18:52:18,223 INFO L226 Difference]: Without dead ends: 3377 [2021-08-21 18:52:18,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3377 states. [2021-08-21 18:52:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3377 to 2808. [2021-08-21 18:52:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2807 states have (on average 2.176344852155326) internal successors, (6109), 2807 states have internal predecessors, (6109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 6109 transitions. [2021-08-21 18:52:18,251 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 6109 transitions. Word has length 29 [2021-08-21 18:52:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:18,251 INFO L470 AbstractCegarLoop]: Abstraction has 2808 states and 6109 transitions. [2021-08-21 18:52:18,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 6109 transitions. [2021-08-21 18:52:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:18,255 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:18,255 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:18,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:18,456 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,SelfDestructingSolverStorable61 [2021-08-21 18:52:18,457 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:18,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:18,457 INFO L82 PathProgramCache]: Analyzing trace with hash -497836431, now seen corresponding path program 1 times [2021-08-21 18:52:18,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:18,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983137858] [2021-08-21 18:52:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:18,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:18,500 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 18:52:18,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:18,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983137858] [2021-08-21 18:52:18,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983137858] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:18,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:18,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:18,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987840799] [2021-08-21 18:52:18,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:18,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:18,501 INFO L87 Difference]: Start difference. First operand 2808 states and 6109 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:18,557 INFO L93 Difference]: Finished difference Result 3498 states and 7526 transitions. [2021-08-21 18:52:18,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:18,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:18,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:18,561 INFO L225 Difference]: With dead ends: 3498 [2021-08-21 18:52:18,561 INFO L226 Difference]: Without dead ends: 3491 [2021-08-21 18:52:18,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3491 states. [2021-08-21 18:52:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3491 to 2872. [2021-08-21 18:52:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 2.205851619644723) internal successors, (6333), 2871 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 6333 transitions. [2021-08-21 18:52:18,591 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 6333 transitions. Word has length 29 [2021-08-21 18:52:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 2872 states and 6333 transitions. [2021-08-21 18:52:18,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 6333 transitions. [2021-08-21 18:52:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:18,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:18,594 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:18,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-08-21 18:52:18,595 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:18,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:18,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1215605189, now seen corresponding path program 1 times [2021-08-21 18:52:18,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:18,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190185794] [2021-08-21 18:52:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:18,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:18,640 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 18:52:18,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:18,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190185794] [2021-08-21 18:52:18,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190185794] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:18,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:18,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:18,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621987983] [2021-08-21 18:52:18,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:18,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:18,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:18,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:18,641 INFO L87 Difference]: Start difference. First operand 2872 states and 6333 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:18,697 INFO L93 Difference]: Finished difference Result 3622 states and 7792 transitions. [2021-08-21 18:52:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:18,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:18,702 INFO L225 Difference]: With dead ends: 3622 [2021-08-21 18:52:18,702 INFO L226 Difference]: Without dead ends: 3611 [2021-08-21 18:52:18,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-08-21 18:52:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2959. [2021-08-21 18:52:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2958 states have (on average 2.2187288708586883) internal successors, (6563), 2958 states have internal predecessors, (6563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 6563 transitions. [2021-08-21 18:52:18,733 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 6563 transitions. Word has length 29 [2021-08-21 18:52:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:18,733 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 6563 transitions. [2021-08-21 18:52:18,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 6563 transitions. [2021-08-21 18:52:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:18,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:18,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:18,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-08-21 18:52:18,736 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash -543770427, now seen corresponding path program 1 times [2021-08-21 18:52:18,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:18,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618207817] [2021-08-21 18:52:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:18,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:18,782 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 18:52:18,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:18,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618207817] [2021-08-21 18:52:18,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618207817] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:18,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:18,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:18,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475453099] [2021-08-21 18:52:18,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:18,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:18,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:18,784 INFO L87 Difference]: Start difference. First operand 2959 states and 6563 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:18,861 INFO L93 Difference]: Finished difference Result 3712 states and 8168 transitions. [2021-08-21 18:52:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:18,867 INFO L225 Difference]: With dead ends: 3712 [2021-08-21 18:52:18,867 INFO L226 Difference]: Without dead ends: 3705 [2021-08-21 18:52:18,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-08-21 18:52:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 3075. [2021-08-21 18:52:18,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 3074 states have (on average 2.2839947950553023) internal successors, (7021), 3074 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 7021 transitions. [2021-08-21 18:52:18,906 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 7021 transitions. Word has length 29 [2021-08-21 18:52:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:18,907 INFO L470 AbstractCegarLoop]: Abstraction has 3075 states and 7021 transitions. [2021-08-21 18:52:18,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 7021 transitions. [2021-08-21 18:52:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:18,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:18,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:18,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-08-21 18:52:18,912 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:18,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:18,913 INFO L82 PathProgramCache]: Analyzing trace with hash 257322557, now seen corresponding path program 2 times [2021-08-21 18:52:18,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:18,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525017830] [2021-08-21 18:52:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:18,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:18,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:18,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525017830] [2021-08-21 18:52:18,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525017830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:18,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614929163] [2021-08-21 18:52:18,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:18,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:18,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:18,956 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 18:52:18,957 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 18:52:19,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:19,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:19,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:19,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614929163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:19,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:19,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:19,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530283246] [2021-08-21 18:52:19,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:19,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:19,593 INFO L87 Difference]: Start difference. First operand 3075 states and 7021 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:19,660 INFO L93 Difference]: Finished difference Result 3737 states and 8396 transitions. [2021-08-21 18:52:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:19,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:19,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:19,665 INFO L225 Difference]: With dead ends: 3737 [2021-08-21 18:52:19,665 INFO L226 Difference]: Without dead ends: 3730 [2021-08-21 18:52:19,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2021-08-21 18:52:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3122. [2021-08-21 18:52:19,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 2.31175905158603) internal successors, (7215), 3121 states have internal predecessors, (7215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 7215 transitions. [2021-08-21 18:52:19,700 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 7215 transitions. Word has length 29 [2021-08-21 18:52:19,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:19,700 INFO L470 AbstractCegarLoop]: Abstraction has 3122 states and 7215 transitions. [2021-08-21 18:52:19,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 7215 transitions. [2021-08-21 18:52:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:19,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:19,703 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] [2021-08-21 18:52:19,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 18:52:19,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:19,904 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:19,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:19,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1947303495, now seen corresponding path program 3 times [2021-08-21 18:52:19,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:19,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823501798] [2021-08-21 18:52:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:19,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:19,945 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 18:52:19,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:19,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823501798] [2021-08-21 18:52:19,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823501798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:19,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356072606] [2021-08-21 18:52:19,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:19,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:19,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:19,946 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 18:52:19,947 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 18:52:20,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:20,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:20,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356072606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:20,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:20,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:20,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664581220] [2021-08-21 18:52:20,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:20,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:20,596 INFO L87 Difference]: Start difference. First operand 3122 states and 7215 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:20,653 INFO L93 Difference]: Finished difference Result 3734 states and 8404 transitions. [2021-08-21 18:52:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:20,659 INFO L225 Difference]: With dead ends: 3734 [2021-08-21 18:52:20,659 INFO L226 Difference]: Without dead ends: 3727 [2021-08-21 18:52:20,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:20,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-08-21 18:52:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3149. [2021-08-21 18:52:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 2.3141677255400253) internal successors, (7285), 3148 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 7285 transitions. [2021-08-21 18:52:20,693 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 7285 transitions. Word has length 29 [2021-08-21 18:52:20,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:20,693 INFO L470 AbstractCegarLoop]: Abstraction has 3149 states and 7285 transitions. [2021-08-21 18:52:20,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:20,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 7285 transitions. [2021-08-21 18:52:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:20,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:20,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:20,714 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 18:52:20,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:20,898 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:20,898 INFO L82 PathProgramCache]: Analyzing trace with hash -703404755, now seen corresponding path program 2 times [2021-08-21 18:52:20,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:20,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476916169] [2021-08-21 18:52:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:20,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:20,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:20,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476916169] [2021-08-21 18:52:20,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476916169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:20,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984502306] [2021-08-21 18:52:20,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:20,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:20,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:20,941 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 18:52:20,942 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 18:52:21,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:21,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:21,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:21,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:21,620 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 18:52:21,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984502306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:21,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:21,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:21,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855439172] [2021-08-21 18:52:21,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:21,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:21,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:21,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:21,621 INFO L87 Difference]: Start difference. First operand 3149 states and 7285 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:21,681 INFO L93 Difference]: Finished difference Result 3773 states and 8557 transitions. [2021-08-21 18:52:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:21,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:21,687 INFO L225 Difference]: With dead ends: 3773 [2021-08-21 18:52:21,687 INFO L226 Difference]: Without dead ends: 3766 [2021-08-21 18:52:21,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3766 states. [2021-08-21 18:52:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3766 to 3177. [2021-08-21 18:52:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 2.327141057934509) internal successors, (7391), 3176 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 7391 transitions. [2021-08-21 18:52:21,720 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 7391 transitions. Word has length 29 [2021-08-21 18:52:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:21,720 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 7391 transitions. [2021-08-21 18:52:21,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 7391 transitions. [2021-08-21 18:52:21,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:21,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:21,723 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:21,741 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 18:52:21,928 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,SelfDestructingSolverStorable67 [2021-08-21 18:52:21,929 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1694624963, now seen corresponding path program 3 times [2021-08-21 18:52:21,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:21,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504805433] [2021-08-21 18:52:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:21,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:21,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:21,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504805433] [2021-08-21 18:52:21,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504805433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:21,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060675297] [2021-08-21 18:52:21,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:21,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:21,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:21,975 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 18:52:21,975 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 18:52:22,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:22,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:22,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:22,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:22,659 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 18:52:22,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060675297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:22,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:22,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:22,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507767491] [2021-08-21 18:52:22,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:22,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:22,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:22,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:22,660 INFO L87 Difference]: Start difference. First operand 3177 states and 7391 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:22,717 INFO L93 Difference]: Finished difference Result 3754 states and 8512 transitions. [2021-08-21 18:52:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:22,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:22,721 INFO L225 Difference]: With dead ends: 3754 [2021-08-21 18:52:22,721 INFO L226 Difference]: Without dead ends: 3747 [2021-08-21 18:52:22,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:22,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2021-08-21 18:52:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3195. [2021-08-21 18:52:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3194 states have (on average 2.330932999373826) internal successors, (7445), 3194 states have internal predecessors, (7445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 7445 transitions. [2021-08-21 18:52:22,752 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 7445 transitions. Word has length 29 [2021-08-21 18:52:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:22,752 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 7445 transitions. [2021-08-21 18:52:22,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 7445 transitions. [2021-08-21 18:52:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:22,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:22,756 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] [2021-08-21 18:52:22,773 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 18:52:22,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 18:52:22,956 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:22,956 INFO L82 PathProgramCache]: Analyzing trace with hash 700805449, now seen corresponding path program 2 times [2021-08-21 18:52:22,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:22,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159891552] [2021-08-21 18:52:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:22,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:23,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:23,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159891552] [2021-08-21 18:52:23,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159891552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:23,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976522350] [2021-08-21 18:52:23,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:23,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:23,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:23,049 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 18:52:23,050 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 18:52:23,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:23,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:23,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:23,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976522350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:23,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:23,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:23,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795462005] [2021-08-21 18:52:23,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:23,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:23,743 INFO L87 Difference]: Start difference. First operand 3195 states and 7445 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:23,804 INFO L93 Difference]: Finished difference Result 3782 states and 8629 transitions. [2021-08-21 18:52:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:23,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:23,809 INFO L225 Difference]: With dead ends: 3782 [2021-08-21 18:52:23,809 INFO L226 Difference]: Without dead ends: 3775 [2021-08-21 18:52:23,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-08-21 18:52:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 3209. [2021-08-21 18:52:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 2.3400872817955114) internal successors, (7507), 3208 states have internal predecessors, (7507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 7507 transitions. [2021-08-21 18:52:23,842 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 7507 transitions. Word has length 29 [2021-08-21 18:52:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:23,842 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 7507 transitions. [2021-08-21 18:52:23,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 7507 transitions. [2021-08-21 18:52:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:23,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:23,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:23,863 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 18:52:24,046 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,SelfDestructingSolverStorable69 [2021-08-21 18:52:24,046 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1501181807, now seen corresponding path program 1 times [2021-08-21 18:52:24,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:24,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446238536] [2021-08-21 18:52:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:24,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:24,092 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 18:52:24,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:24,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446238536] [2021-08-21 18:52:24,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446238536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:24,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:24,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:24,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800471387] [2021-08-21 18:52:24,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:24,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:24,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:24,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:24,093 INFO L87 Difference]: Start difference. First operand 3209 states and 7507 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:24,153 INFO L93 Difference]: Finished difference Result 3959 states and 8992 transitions. [2021-08-21 18:52:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:24,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:24,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:24,158 INFO L225 Difference]: With dead ends: 3959 [2021-08-21 18:52:24,158 INFO L226 Difference]: Without dead ends: 3948 [2021-08-21 18:52:24,158 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 18:52:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-08-21 18:52:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3337. [2021-08-21 18:52:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 2.343824940047962) internal successors, (7819), 3336 states have internal predecessors, (7819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 7819 transitions. [2021-08-21 18:52:24,202 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 7819 transitions. Word has length 29 [2021-08-21 18:52:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:24,202 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 7819 transitions. [2021-08-21 18:52:24,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 7819 transitions. [2021-08-21 18:52:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:24,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:24,207 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:24,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-08-21 18:52:24,207 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:24,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1034409873, now seen corresponding path program 1 times [2021-08-21 18:52:24,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:24,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314096421] [2021-08-21 18:52:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:24,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:24,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:24,256 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 18:52:24,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:24,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314096421] [2021-08-21 18:52:24,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314096421] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:24,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:24,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:24,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877153790] [2021-08-21 18:52:24,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:24,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:24,257 INFO L87 Difference]: Start difference. First operand 3337 states and 7819 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:24,327 INFO L93 Difference]: Finished difference Result 4044 states and 9237 transitions. [2021-08-21 18:52:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:24,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:24,332 INFO L225 Difference]: With dead ends: 4044 [2021-08-21 18:52:24,332 INFO L226 Difference]: Without dead ends: 4037 [2021-08-21 18:52:24,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-08-21 18:52:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 3396. [2021-08-21 18:52:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 2.366715758468336) internal successors, (8035), 3395 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 8035 transitions. [2021-08-21 18:52:24,391 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 8035 transitions. Word has length 29 [2021-08-21 18:52:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:24,391 INFO L470 AbstractCegarLoop]: Abstraction has 3396 states and 8035 transitions. [2021-08-21 18:52:24,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 8035 transitions. [2021-08-21 18:52:24,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:24,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:24,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:24,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-08-21 18:52:24,395 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:24,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:24,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1681727043, now seen corresponding path program 2 times [2021-08-21 18:52:24,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:24,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255215806] [2021-08-21 18:52:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:24,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:24,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:24,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255215806] [2021-08-21 18:52:24,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255215806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:24,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917666333] [2021-08-21 18:52:24,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:24,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:24,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:24,451 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 18:52:24,452 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 18:52:25,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:25,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:25,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917666333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:25,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:25,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:25,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705510575] [2021-08-21 18:52:25,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:25,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:25,177 INFO L87 Difference]: Start difference. First operand 3396 states and 8035 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:25,240 INFO L93 Difference]: Finished difference Result 4009 states and 9207 transitions. [2021-08-21 18:52:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:25,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:25,245 INFO L225 Difference]: With dead ends: 4009 [2021-08-21 18:52:25,246 INFO L226 Difference]: Without dead ends: 4002 [2021-08-21 18:52:25,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-08-21 18:52:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 3449. [2021-08-21 18:52:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 2.3662993039443156) internal successors, (8159), 3448 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 8159 transitions. [2021-08-21 18:52:25,281 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 8159 transitions. Word has length 29 [2021-08-21 18:52:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:25,282 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 8159 transitions. [2021-08-21 18:52:25,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 8159 transitions. [2021-08-21 18:52:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:25,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:25,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:25,303 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 18:52:25,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:25,486 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash 173710781, now seen corresponding path program 1 times [2021-08-21 18:52:25,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:25,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689504717] [2021-08-21 18:52:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:25,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:25,524 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 18:52:25,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:25,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689504717] [2021-08-21 18:52:25,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689504717] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:25,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:25,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:25,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707430537] [2021-08-21 18:52:25,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:25,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:25,525 INFO L87 Difference]: Start difference. First operand 3449 states and 8159 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:25,595 INFO L93 Difference]: Finished difference Result 4216 states and 9626 transitions. [2021-08-21 18:52:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:25,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:25,600 INFO L225 Difference]: With dead ends: 4216 [2021-08-21 18:52:25,600 INFO L226 Difference]: Without dead ends: 4205 [2021-08-21 18:52:25,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4205 states. [2021-08-21 18:52:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4205 to 3510. [2021-08-21 18:52:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 3509 states have (on average 2.3684810487318324) internal successors, (8311), 3509 states have internal predecessors, (8311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 8311 transitions. [2021-08-21 18:52:25,636 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 8311 transitions. Word has length 29 [2021-08-21 18:52:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:25,636 INFO L470 AbstractCegarLoop]: Abstraction has 3510 states and 8311 transitions. [2021-08-21 18:52:25,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 8311 transitions. [2021-08-21 18:52:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:25,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:25,640 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] [2021-08-21 18:52:25,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-08-21 18:52:25,641 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash 126351421, now seen corresponding path program 3 times [2021-08-21 18:52:25,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:25,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578484529] [2021-08-21 18:52:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:25,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:25,679 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 18:52:25,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:25,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578484529] [2021-08-21 18:52:25,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578484529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:25,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205115002] [2021-08-21 18:52:25,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:25,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:25,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:25,681 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 18:52:25,717 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 18:52:26,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:52:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:26,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:26,416 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 18:52:26,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205115002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:26,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:26,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:26,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592674720] [2021-08-21 18:52:26,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:26,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:26,417 INFO L87 Difference]: Start difference. First operand 3510 states and 8311 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:26,486 INFO L93 Difference]: Finished difference Result 4195 states and 9705 transitions. [2021-08-21 18:52:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:26,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:26,491 INFO L225 Difference]: With dead ends: 4195 [2021-08-21 18:52:26,491 INFO L226 Difference]: Without dead ends: 4188 [2021-08-21 18:52:26,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-08-21 18:52:26,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3566. [2021-08-21 18:52:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 2.3929873772791024) internal successors, (8531), 3565 states have internal predecessors, (8531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 8531 transitions. [2021-08-21 18:52:26,535 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 8531 transitions. Word has length 29 [2021-08-21 18:52:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:26,535 INFO L470 AbstractCegarLoop]: Abstraction has 3566 states and 8531 transitions. [2021-08-21 18:52:26,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 8531 transitions. [2021-08-21 18:52:26,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:26,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:26,540 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:26,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:26,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:26,757 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:26,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2092187449, now seen corresponding path program 3 times [2021-08-21 18:52:26,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:26,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306406922] [2021-08-21 18:52:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:26,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:26,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:26,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306406922] [2021-08-21 18:52:26,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306406922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:26,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374057520] [2021-08-21 18:52:26,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:26,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:26,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:26,833 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 18:52:26,835 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 18:52:27,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:52:27,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:27,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:27,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374057520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:27,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:27,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:27,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584834147] [2021-08-21 18:52:27,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:27,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:27,619 INFO L87 Difference]: Start difference. First operand 3566 states and 8531 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:27,693 INFO L93 Difference]: Finished difference Result 4267 states and 9948 transitions. [2021-08-21 18:52:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:27,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:27,699 INFO L225 Difference]: With dead ends: 4267 [2021-08-21 18:52:27,699 INFO L226 Difference]: Without dead ends: 4260 [2021-08-21 18:52:27,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2021-08-21 18:52:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 3627. [2021-08-21 18:52:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.4117484831770546) internal successors, (8745), 3626 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 8745 transitions. [2021-08-21 18:52:27,740 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 8745 transitions. Word has length 29 [2021-08-21 18:52:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:27,740 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 8745 transitions. [2021-08-21 18:52:27,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 8745 transitions. [2021-08-21 18:52:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:27,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:27,744 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] [2021-08-21 18:52:27,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 18:52:27,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-21 18:52:27,945 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:27,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:27,945 INFO L82 PathProgramCache]: Analyzing trace with hash -236943819, now seen corresponding path program 2 times [2021-08-21 18:52:27,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:27,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342159724] [2021-08-21 18:52:27,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:27,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:27,988 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 18:52:27,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:27,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342159724] [2021-08-21 18:52:27,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342159724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:27,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609713182] [2021-08-21 18:52:27,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:27,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:27,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:27,991 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 18:52:27,993 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 18:52:28,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:28,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:28,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:28,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:28,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609713182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:28,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:28,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:28,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759262380] [2021-08-21 18:52:28,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:28,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:28,758 INFO L87 Difference]: Start difference. First operand 3627 states and 8745 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:28,820 INFO L93 Difference]: Finished difference Result 4252 states and 9980 transitions. [2021-08-21 18:52:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:28,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:28,826 INFO L225 Difference]: With dead ends: 4252 [2021-08-21 18:52:28,826 INFO L226 Difference]: Without dead ends: 4245 [2021-08-21 18:52:28,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2021-08-21 18:52:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 3655. [2021-08-21 18:52:28,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3654 states have (on average 2.4244663382594416) internal successors, (8859), 3654 states have internal predecessors, (8859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 8859 transitions. [2021-08-21 18:52:28,868 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 8859 transitions. Word has length 29 [2021-08-21 18:52:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:28,868 INFO L470 AbstractCegarLoop]: Abstraction has 3655 states and 8859 transitions. [2021-08-21 18:52:28,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 8859 transitions. [2021-08-21 18:52:28,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:28,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:28,873 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:28,890 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 18:52:29,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-21 18:52:29,073 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:29,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:29,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1728892209, now seen corresponding path program 2 times [2021-08-21 18:52:29,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:29,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577870529] [2021-08-21 18:52:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:29,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:29,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:29,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577870529] [2021-08-21 18:52:29,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577870529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:29,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882165901] [2021-08-21 18:52:29,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:29,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:29,121 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 18:52:29,122 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 18:52:29,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:29,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:29,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:29,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882165901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:29,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:29,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:29,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063826447] [2021-08-21 18:52:29,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:29,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:29,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:29,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:29,900 INFO L87 Difference]: Start difference. First operand 3655 states and 8859 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:29,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:29,968 INFO L93 Difference]: Finished difference Result 4320 states and 10179 transitions. [2021-08-21 18:52:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:29,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:29,975 INFO L225 Difference]: With dead ends: 4320 [2021-08-21 18:52:29,976 INFO L226 Difference]: Without dead ends: 4313 [2021-08-21 18:52:29,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4313 states. [2021-08-21 18:52:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4313 to 3697. [2021-08-21 18:52:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3697 states, 3696 states have (on average 2.4375) internal successors, (9009), 3696 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3697 states to 3697 states and 9009 transitions. [2021-08-21 18:52:30,026 INFO L78 Accepts]: Start accepts. Automaton has 3697 states and 9009 transitions. Word has length 29 [2021-08-21 18:52:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:30,026 INFO L470 AbstractCegarLoop]: Abstraction has 3697 states and 9009 transitions. [2021-08-21 18:52:30,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3697 states and 9009 transitions. [2021-08-21 18:52:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:30,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:30,031 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] [2021-08-21 18:52:30,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:30,244 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,SelfDestructingSolverStorable77 [2021-08-21 18:52:30,245 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2052948549, now seen corresponding path program 4 times [2021-08-21 18:52:30,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:30,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878635200] [2021-08-21 18:52:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:30,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:30,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:30,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878635200] [2021-08-21 18:52:30,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878635200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:30,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260166687] [2021-08-21 18:52:30,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:30,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:30,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:30,293 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 18:52:30,305 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 18:52:30,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:30,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:30,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:30,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:31,093 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 18:52:31,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260166687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:31,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:31,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:31,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903843075] [2021-08-21 18:52:31,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:31,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:31,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:31,094 INFO L87 Difference]: Start difference. First operand 3697 states and 9009 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:31,159 INFO L93 Difference]: Finished difference Result 4389 states and 10410 transitions. [2021-08-21 18:52:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:31,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:31,164 INFO L225 Difference]: With dead ends: 4389 [2021-08-21 18:52:31,164 INFO L226 Difference]: Without dead ends: 4382 [2021-08-21 18:52:31,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-08-21 18:52:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 3759. [2021-08-21 18:52:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.453964874933475) internal successors, (9222), 3758 states have internal predecessors, (9222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:31,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9222 transitions. [2021-08-21 18:52:31,202 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9222 transitions. Word has length 29 [2021-08-21 18:52:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:31,202 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 9222 transitions. [2021-08-21 18:52:31,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:31,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9222 transitions. [2021-08-21 18:52:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:31,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:31,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:31,223 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 18:52:31,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 18:52:31,407 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:31,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:31,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1237432057, now seen corresponding path program 4 times [2021-08-21 18:52:31,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:31,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043604753] [2021-08-21 18:52:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:31,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:31,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:31,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043604753] [2021-08-21 18:52:31,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043604753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:31,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860135940] [2021-08-21 18:52:31,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:31,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:31,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:31,457 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 18:52:31,458 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 18:52:32,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:32,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:32,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:32,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860135940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:32,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:32,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:32,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706360169] [2021-08-21 18:52:32,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:32,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:32,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:32,267 INFO L87 Difference]: Start difference. First operand 3759 states and 9222 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:32,323 INFO L93 Difference]: Finished difference Result 4409 states and 10503 transitions. [2021-08-21 18:52:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:32,329 INFO L225 Difference]: With dead ends: 4409 [2021-08-21 18:52:32,330 INFO L226 Difference]: Without dead ends: 4402 [2021-08-21 18:52:32,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2021-08-21 18:52:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 3797. [2021-08-21 18:52:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 2.462855637513172) internal successors, (9349), 3796 states have internal predecessors, (9349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 9349 transitions. [2021-08-21 18:52:32,369 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 9349 transitions. Word has length 29 [2021-08-21 18:52:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:32,369 INFO L470 AbstractCegarLoop]: Abstraction has 3797 states and 9349 transitions. [2021-08-21 18:52:32,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 9349 transitions. [2021-08-21 18:52:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:32,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:32,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:32,391 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 18:52:32,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:32,574 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:32,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1344093619, now seen corresponding path program 4 times [2021-08-21 18:52:32,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:32,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765025285] [2021-08-21 18:52:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:32,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:32,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:32,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765025285] [2021-08-21 18:52:32,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765025285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:32,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667072606] [2021-08-21 18:52:32,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:32,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:32,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:32,618 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 18:52:32,618 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 18:52:33,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:33,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:33,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:33,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667072606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:33,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:33,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:33,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010429358] [2021-08-21 18:52:33,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:33,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:33,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:33,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:33,442 INFO L87 Difference]: Start difference. First operand 3797 states and 9349 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:33,498 INFO L93 Difference]: Finished difference Result 4498 states and 10678 transitions. [2021-08-21 18:52:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:33,504 INFO L225 Difference]: With dead ends: 4498 [2021-08-21 18:52:33,504 INFO L226 Difference]: Without dead ends: 4487 [2021-08-21 18:52:33,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:33,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4487 states. [2021-08-21 18:52:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4487 to 3832. [2021-08-21 18:52:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 2.4633255024797704) internal successors, (9437), 3831 states have internal predecessors, (9437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 9437 transitions. [2021-08-21 18:52:33,543 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 9437 transitions. Word has length 29 [2021-08-21 18:52:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:33,543 INFO L470 AbstractCegarLoop]: Abstraction has 3832 states and 9437 transitions. [2021-08-21 18:52:33,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 9437 transitions. [2021-08-21 18:52:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:33,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:33,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:33,565 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 18:52:33,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:33,748 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1191498061, now seen corresponding path program 4 times [2021-08-21 18:52:33,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:33,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515627556] [2021-08-21 18:52:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:33,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:33,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:33,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515627556] [2021-08-21 18:52:33,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515627556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:33,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955395762] [2021-08-21 18:52:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:33,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:33,791 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 18:52:33,793 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 18:52:34,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:34,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:34,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955395762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:34,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:34,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:34,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65819929] [2021-08-21 18:52:34,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:34,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:34,631 INFO L87 Difference]: Start difference. First operand 3832 states and 9437 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:34,694 INFO L93 Difference]: Finished difference Result 4535 states and 10814 transitions. [2021-08-21 18:52:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:34,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:34,700 INFO L225 Difference]: With dead ends: 4535 [2021-08-21 18:52:34,700 INFO L226 Difference]: Without dead ends: 4528 [2021-08-21 18:52:34,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-08-21 18:52:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 3872. [2021-08-21 18:52:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3872 states, 3871 states have (on average 2.4709377421854817) internal successors, (9565), 3871 states have internal predecessors, (9565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3872 states to 3872 states and 9565 transitions. [2021-08-21 18:52:34,741 INFO L78 Accepts]: Start accepts. Automaton has 3872 states and 9565 transitions. Word has length 29 [2021-08-21 18:52:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:34,741 INFO L470 AbstractCegarLoop]: Abstraction has 3872 states and 9565 transitions. [2021-08-21 18:52:34,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3872 states and 9565 transitions. [2021-08-21 18:52:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:34,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:34,746 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] [2021-08-21 18:52:34,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:34,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:34,946 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:34,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:34,947 INFO L82 PathProgramCache]: Analyzing trace with hash 67579081, now seen corresponding path program 5 times [2021-08-21 18:52:34,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:34,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270642751] [2021-08-21 18:52:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:34,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:34,996 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 18:52:34,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:34,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270642751] [2021-08-21 18:52:34,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270642751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:34,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981919558] [2021-08-21 18:52:34,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:35,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:35,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:35,001 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 18:52:35,003 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 18:52:35,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:35,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:35,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:35,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:35,865 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 18:52:35,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981919558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:35,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:35,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:35,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514835016] [2021-08-21 18:52:35,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:35,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:35,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:35,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:35,866 INFO L87 Difference]: Start difference. First operand 3872 states and 9565 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:35,939 INFO L93 Difference]: Finished difference Result 4409 states and 10630 transitions. [2021-08-21 18:52:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:35,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:35,946 INFO L225 Difference]: With dead ends: 4409 [2021-08-21 18:52:35,946 INFO L226 Difference]: Without dead ends: 4402 [2021-08-21 18:52:35,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2021-08-21 18:52:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 3901. [2021-08-21 18:52:35,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.4784615384615383) internal successors, (9666), 3900 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 9666 transitions. [2021-08-21 18:52:35,996 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 9666 transitions. Word has length 29 [2021-08-21 18:52:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:35,996 INFO L470 AbstractCegarLoop]: Abstraction has 3901 states and 9666 transitions. [2021-08-21 18:52:35,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 9666 transitions. [2021-08-21 18:52:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:36,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:36,001 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] [2021-08-21 18:52:36,020 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 18:52:36,202 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,SelfDestructingSolverStorable82 [2021-08-21 18:52:36,202 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:36,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:36,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1076670987, now seen corresponding path program 3 times [2021-08-21 18:52:36,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:36,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397552991] [2021-08-21 18:52:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:36,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:36,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:36,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397552991] [2021-08-21 18:52:36,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397552991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:36,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27660458] [2021-08-21 18:52:36,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:36,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:36,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:36,256 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 18:52:36,258 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 18:52:37,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:37,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:37,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:37,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:37,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27660458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:37,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:37,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:37,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099498400] [2021-08-21 18:52:37,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:37,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:37,134 INFO L87 Difference]: Start difference. First operand 3901 states and 9666 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:37,199 INFO L93 Difference]: Finished difference Result 4514 states and 10870 transitions. [2021-08-21 18:52:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:37,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:37,206 INFO L225 Difference]: With dead ends: 4514 [2021-08-21 18:52:37,206 INFO L226 Difference]: Without dead ends: 4507 [2021-08-21 18:52:37,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-08-21 18:52:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3919. [2021-08-21 18:52:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 2.48468606431853) internal successors, (9735), 3918 states have internal predecessors, (9735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 9735 transitions. [2021-08-21 18:52:37,253 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 9735 transitions. Word has length 29 [2021-08-21 18:52:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:37,253 INFO L470 AbstractCegarLoop]: Abstraction has 3919 states and 9735 transitions. [2021-08-21 18:52:37,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 9735 transitions. [2021-08-21 18:52:37,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:37,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:37,258 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:37,276 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 18:52:37,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:37,459 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:37,459 INFO L82 PathProgramCache]: Analyzing trace with hash 636770633, now seen corresponding path program 3 times [2021-08-21 18:52:37,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:37,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441714883] [2021-08-21 18:52:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:37,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:37,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:37,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441714883] [2021-08-21 18:52:37,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441714883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:37,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688410755] [2021-08-21 18:52:37,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:37,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:37,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:37,504 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 18:52:37,505 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 18:52:38,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:38,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:38,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:38,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688410755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:38,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:38,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:38,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678484693] [2021-08-21 18:52:38,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:38,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:38,385 INFO L87 Difference]: Start difference. First operand 3919 states and 9735 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:38,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:38,449 INFO L93 Difference]: Finished difference Result 4583 states and 10981 transitions. [2021-08-21 18:52:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:38,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:38,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:38,455 INFO L225 Difference]: With dead ends: 4583 [2021-08-21 18:52:38,455 INFO L226 Difference]: Without dead ends: 4572 [2021-08-21 18:52:38,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4572 states. [2021-08-21 18:52:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4572 to 3942. [2021-08-21 18:52:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 2.487439736107587) internal successors, (9803), 3941 states have internal predecessors, (9803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 9803 transitions. [2021-08-21 18:52:38,497 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 9803 transitions. Word has length 29 [2021-08-21 18:52:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:38,497 INFO L470 AbstractCegarLoop]: Abstraction has 3942 states and 9803 transitions. [2021-08-21 18:52:38,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 9803 transitions. [2021-08-21 18:52:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:38,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:38,502 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 18:52:38,520 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 18:52:38,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:38,709 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1122604983, now seen corresponding path program 3 times [2021-08-21 18:52:38,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:38,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109378808] [2021-08-21 18:52:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:38,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:38,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:38,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109378808] [2021-08-21 18:52:38,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109378808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:38,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110468717] [2021-08-21 18:52:38,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:38,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:38,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:38,753 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 18:52:38,777 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 18:52:39,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:39,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110468717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:39,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:39,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:39,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794295198] [2021-08-21 18:52:39,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:39,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:39,704 INFO L87 Difference]: Start difference. First operand 3942 states and 9803 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:39,777 INFO L93 Difference]: Finished difference Result 4569 states and 11021 transitions. [2021-08-21 18:52:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:39,784 INFO L225 Difference]: With dead ends: 4569 [2021-08-21 18:52:39,785 INFO L226 Difference]: Without dead ends: 4562 [2021-08-21 18:52:39,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-08-21 18:52:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3972. [2021-08-21 18:52:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3971 states have (on average 2.5013850415512464) internal successors, (9933), 3971 states have internal predecessors, (9933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 9933 transitions. [2021-08-21 18:52:39,836 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 9933 transitions. Word has length 29 [2021-08-21 18:52:39,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:39,836 INFO L470 AbstractCegarLoop]: Abstraction has 3972 states and 9933 transitions. [2021-08-21 18:52:39,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 9933 transitions. [2021-08-21 18:52:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:39,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:39,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:39,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:40,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:40,044 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:40,044 INFO L82 PathProgramCache]: Analyzing trace with hash -321511999, now seen corresponding path program 4 times [2021-08-21 18:52:40,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:40,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56116350] [2021-08-21 18:52:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:40,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:40,089 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 18:52:40,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:40,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56116350] [2021-08-21 18:52:40,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56116350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:40,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018635895] [2021-08-21 18:52:40,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:40,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:40,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:40,090 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 18:52:40,092 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 18:52:40,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:40,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:40,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:40,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:41,081 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 18:52:41,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018635895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:41,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:41,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:41,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670717390] [2021-08-21 18:52:41,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:41,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:41,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:41,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:41,082 INFO L87 Difference]: Start difference. First operand 3972 states and 9933 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:41,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:41,169 INFO L93 Difference]: Finished difference Result 4536 states and 11062 transitions. [2021-08-21 18:52:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:41,176 INFO L225 Difference]: With dead ends: 4536 [2021-08-21 18:52:41,176 INFO L226 Difference]: Without dead ends: 4529 [2021-08-21 18:52:41,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4529 states. [2021-08-21 18:52:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4529 to 3999. [2021-08-21 18:52:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3998 states have (on average 2.511505752876438) internal successors, (10041), 3998 states have internal predecessors, (10041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:41,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 10041 transitions. [2021-08-21 18:52:41,224 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 10041 transitions. Word has length 29 [2021-08-21 18:52:41,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:41,224 INFO L470 AbstractCegarLoop]: Abstraction has 3999 states and 10041 transitions. [2021-08-21 18:52:41,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 10041 transitions. [2021-08-21 18:52:41,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:41,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:41,230 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:41,249 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 18:52:41,430 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,SelfDestructingSolverStorable86 [2021-08-21 18:52:41,430 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:41,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:41,430 INFO L82 PathProgramCache]: Analyzing trace with hash 149434565, now seen corresponding path program 6 times [2021-08-21 18:52:41,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:41,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987974386] [2021-08-21 18:52:41,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:41,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:52:41,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:41,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987974386] [2021-08-21 18:52:41,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987974386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:41,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533205371] [2021-08-21 18:52:41,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:52:41,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:41,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:41,481 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 18:52:41,497 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 18:52:42,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:52:42,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:42,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:42,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:42,435 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 18:52:42,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533205371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:42,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:42,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:42,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886050850] [2021-08-21 18:52:42,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:42,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:42,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:42,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:42,436 INFO L87 Difference]: Start difference. First operand 3999 states and 10041 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:42,524 INFO L93 Difference]: Finished difference Result 4536 states and 11123 transitions. [2021-08-21 18:52:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:42,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:42,530 INFO L225 Difference]: With dead ends: 4536 [2021-08-21 18:52:42,530 INFO L226 Difference]: Without dead ends: 4529 [2021-08-21 18:52:42,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4529 states. [2021-08-21 18:52:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4529 to 4020. [2021-08-21 18:52:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 4019 states have (on average 2.5177904951480468) internal successors, (10119), 4019 states have internal predecessors, (10119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 10119 transitions. [2021-08-21 18:52:42,571 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 10119 transitions. Word has length 29 [2021-08-21 18:52:42,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:42,571 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 10119 transitions. [2021-08-21 18:52:42,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 10119 transitions. [2021-08-21 18:52:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:42,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:42,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:42,595 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 18:52:42,776 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,SelfDestructingSolverStorable87 [2021-08-21 18:52:42,777 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1428854799, now seen corresponding path program 3 times [2021-08-21 18:52:42,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:42,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362164331] [2021-08-21 18:52:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:42,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:42,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:42,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362164331] [2021-08-21 18:52:42,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362164331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:42,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518109261] [2021-08-21 18:52:42,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:42,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:42,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:42,822 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 18:52:42,823 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 18:52:43,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:43,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:43,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:43,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:43,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518109261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:43,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:43,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:43,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146114801] [2021-08-21 18:52:43,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:43,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:43,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:43,786 INFO L87 Difference]: Start difference. First operand 4020 states and 10119 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:43,848 INFO L93 Difference]: Finished difference Result 4645 states and 11351 transitions. [2021-08-21 18:52:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:43,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:43,855 INFO L225 Difference]: With dead ends: 4645 [2021-08-21 18:52:43,856 INFO L226 Difference]: Without dead ends: 4638 [2021-08-21 18:52:43,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:43,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4638 states. [2021-08-21 18:52:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4638 to 4032. [2021-08-21 18:52:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4032 states, 4031 states have (on average 2.5222029273133217) internal successors, (10167), 4031 states have internal predecessors, (10167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4032 states to 4032 states and 10167 transitions. [2021-08-21 18:52:43,902 INFO L78 Accepts]: Start accepts. Automaton has 4032 states and 10167 transitions. Word has length 29 [2021-08-21 18:52:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:43,902 INFO L470 AbstractCegarLoop]: Abstraction has 4032 states and 10167 transitions. [2021-08-21 18:52:43,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4032 states and 10167 transitions. [2021-08-21 18:52:43,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:43,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:43,908 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] [2021-08-21 18:52:43,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 18:52:44,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-21 18:52:44,108 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:44,109 INFO L82 PathProgramCache]: Analyzing trace with hash 284586821, now seen corresponding path program 3 times [2021-08-21 18:52:44,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:44,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088339214] [2021-08-21 18:52:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:44,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:44,155 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 18:52:44,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:44,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088339214] [2021-08-21 18:52:44,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088339214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:44,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406595742] [2021-08-21 18:52:44,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:44,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:44,156 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 18:52:44,183 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 18:52:45,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:45,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:45,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:45,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:45,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406595742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:45,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:45,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:45,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318171250] [2021-08-21 18:52:45,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:45,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:45,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:45,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:45,176 INFO L87 Difference]: Start difference. First operand 4032 states and 10167 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:45,246 INFO L93 Difference]: Finished difference Result 4710 states and 11445 transitions. [2021-08-21 18:52:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:45,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:45,254 INFO L225 Difference]: With dead ends: 4710 [2021-08-21 18:52:45,254 INFO L226 Difference]: Without dead ends: 4699 [2021-08-21 18:52:45,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2021-08-21 18:52:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 4048. [2021-08-21 18:52:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4048 states, 4047 states have (on average 2.523103533481591) internal successors, (10211), 4047 states have internal predecessors, (10211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4048 states to 4048 states and 10211 transitions. [2021-08-21 18:52:45,303 INFO L78 Accepts]: Start accepts. Automaton has 4048 states and 10211 transitions. Word has length 29 [2021-08-21 18:52:45,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:45,304 INFO L470 AbstractCegarLoop]: Abstraction has 4048 states and 10211 transitions. [2021-08-21 18:52:45,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:45,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4048 states and 10211 transitions. [2021-08-21 18:52:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:45,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:45,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:45,334 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 18:52:45,509 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,SelfDestructingSolverStorable89 [2021-08-21 18:52:45,510 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:45,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1474788795, now seen corresponding path program 3 times [2021-08-21 18:52:45,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:45,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186293543] [2021-08-21 18:52:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:45,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:45,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:45,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186293543] [2021-08-21 18:52:45,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186293543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:45,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751126883] [2021-08-21 18:52:45,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:52:45,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:45,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:45,568 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 18:52:45,568 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 18:52:46,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:52:46,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:46,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:46,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:46,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751126883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:46,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:46,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:46,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631352327] [2021-08-21 18:52:46,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:46,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:46,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:46,542 INFO L87 Difference]: Start difference. First operand 4048 states and 10211 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:46,611 INFO L93 Difference]: Finished difference Result 4699 states and 11483 transitions. [2021-08-21 18:52:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:46,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:46,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:46,618 INFO L225 Difference]: With dead ends: 4699 [2021-08-21 18:52:46,618 INFO L226 Difference]: Without dead ends: 4692 [2021-08-21 18:52:46,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4692 states. [2021-08-21 18:52:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4692 to 4083. [2021-08-21 18:52:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 4082 states have (on average 2.531357177853993) internal successors, (10333), 4082 states have internal predecessors, (10333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 10333 transitions. [2021-08-21 18:52:46,688 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 10333 transitions. Word has length 29 [2021-08-21 18:52:46,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:46,688 INFO L470 AbstractCegarLoop]: Abstraction has 4083 states and 10333 transitions. [2021-08-21 18:52:46,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:46,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 10333 transitions. [2021-08-21 18:52:46,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:46,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:46,695 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] [2021-08-21 18:52:46,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 18:52:46,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:46,895 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:46,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:46,896 INFO L82 PathProgramCache]: Analyzing trace with hash -673695811, now seen corresponding path program 4 times [2021-08-21 18:52:46,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:46,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662192923] [2021-08-21 18:52:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:46,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:46,955 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 18:52:46,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:46,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662192923] [2021-08-21 18:52:46,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662192923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:46,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192540690] [2021-08-21 18:52:46,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:46,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:46,973 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 18:52:46,973 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 18:52:47,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:47,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:47,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:47,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:47,974 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 18:52:47,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192540690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:47,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:47,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:47,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98160320] [2021-08-21 18:52:47,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:47,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:47,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:47,975 INFO L87 Difference]: Start difference. First operand 4083 states and 10333 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:48,044 INFO L93 Difference]: Finished difference Result 4670 states and 11520 transitions. [2021-08-21 18:52:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:48,050 INFO L225 Difference]: With dead ends: 4670 [2021-08-21 18:52:48,050 INFO L226 Difference]: Without dead ends: 4663 [2021-08-21 18:52:48,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4663 states. [2021-08-21 18:52:48,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4663 to 4119. [2021-08-21 18:52:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4119 states, 4118 states have (on average 2.5369111219038367) internal successors, (10447), 4118 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4119 states to 4119 states and 10447 transitions. [2021-08-21 18:52:48,095 INFO L78 Accepts]: Start accepts. Automaton has 4119 states and 10447 transitions. Word has length 29 [2021-08-21 18:52:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:48,095 INFO L470 AbstractCegarLoop]: Abstraction has 4119 states and 10447 transitions. [2021-08-21 18:52:48,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4119 states and 10447 transitions. [2021-08-21 18:52:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:48,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:48,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:48,120 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 18:52:48,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:48,301 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash -376905155, now seen corresponding path program 4 times [2021-08-21 18:52:48,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:48,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050628475] [2021-08-21 18:52:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:48,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:48,346 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 18:52:48,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:48,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050628475] [2021-08-21 18:52:48,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050628475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:48,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687376196] [2021-08-21 18:52:48,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:48,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:48,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:48,348 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 18:52:48,376 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 18:52:49,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:49,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:49,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:49,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687376196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:49,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:49,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:49,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102797169] [2021-08-21 18:52:49,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:49,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:49,366 INFO L87 Difference]: Start difference. First operand 4119 states and 10447 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:49,426 INFO L93 Difference]: Finished difference Result 4800 states and 11801 transitions. [2021-08-21 18:52:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:49,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:49,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:49,433 INFO L225 Difference]: With dead ends: 4800 [2021-08-21 18:52:49,433 INFO L226 Difference]: Without dead ends: 4793 [2021-08-21 18:52:49,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4793 states. [2021-08-21 18:52:49,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4793 to 4165. [2021-08-21 18:52:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4165 states, 4164 states have (on average 2.5451488952929875) internal successors, (10598), 4164 states have internal predecessors, (10598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 10598 transitions. [2021-08-21 18:52:49,478 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 10598 transitions. Word has length 29 [2021-08-21 18:52:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:49,478 INFO L470 AbstractCegarLoop]: Abstraction has 4165 states and 10598 transitions. [2021-08-21 18:52:49,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 10598 transitions. [2021-08-21 18:52:49,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:49,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:49,483 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:49,501 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 18:52:49,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:49,683 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:49,683 INFO L82 PathProgramCache]: Analyzing trace with hash 640117697, now seen corresponding path program 4 times [2021-08-21 18:52:49,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:49,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832407437] [2021-08-21 18:52:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:49,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:49,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:49,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832407437] [2021-08-21 18:52:49,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832407437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:49,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541741065] [2021-08-21 18:52:49,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:49,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:49,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:49,731 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 18:52:49,732 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 18:52:50,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:50,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:50,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541741065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:50,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:50,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:50,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488055824] [2021-08-21 18:52:50,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:50,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:50,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:50,791 INFO L87 Difference]: Start difference. First operand 4165 states and 10598 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:50,852 INFO L93 Difference]: Finished difference Result 4868 states and 11984 transitions. [2021-08-21 18:52:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:50,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:50,860 INFO L225 Difference]: With dead ends: 4868 [2021-08-21 18:52:50,860 INFO L226 Difference]: Without dead ends: 4861 [2021-08-21 18:52:50,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-08-21 18:52:50,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 4213. [2021-08-21 18:52:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.5489078822412155) internal successors, (10736), 4212 states have internal predecessors, (10736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 10736 transitions. [2021-08-21 18:52:50,906 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 10736 transitions. Word has length 29 [2021-08-21 18:52:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:50,906 INFO L470 AbstractCegarLoop]: Abstraction has 4213 states and 10736 transitions. [2021-08-21 18:52:50,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 10736 transitions. [2021-08-21 18:52:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:50,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:50,912 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:50,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:51,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:51,113 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:51,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1691273033, now seen corresponding path program 4 times [2021-08-21 18:52:51,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:51,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669716205] [2021-08-21 18:52:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:51,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:51,155 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 18:52:51,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:51,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669716205] [2021-08-21 18:52:51,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669716205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:51,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053114479] [2021-08-21 18:52:51,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:51,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:51,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:51,157 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 18:52:51,157 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 18:52:52,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:52,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:52,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:52,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:52,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053114479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:52,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:52,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:52,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135850071] [2021-08-21 18:52:52,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:52,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:52,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:52,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:52,225 INFO L87 Difference]: Start difference. First operand 4213 states and 10736 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:52,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:52,295 INFO L93 Difference]: Finished difference Result 4853 states and 11994 transitions. [2021-08-21 18:52:52,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:52,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:52,302 INFO L225 Difference]: With dead ends: 4853 [2021-08-21 18:52:52,302 INFO L226 Difference]: Without dead ends: 4846 [2021-08-21 18:52:52,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2021-08-21 18:52:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 4239. [2021-08-21 18:52:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4238 states have (on average 2.5561585653610193) internal successors, (10833), 4238 states have internal predecessors, (10833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 10833 transitions. [2021-08-21 18:52:52,344 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 10833 transitions. Word has length 29 [2021-08-21 18:52:52,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:52,344 INFO L470 AbstractCegarLoop]: Abstraction has 4239 states and 10833 transitions. [2021-08-21 18:52:52,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 10833 transitions. [2021-08-21 18:52:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:52,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:52,349 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] [2021-08-21 18:52:52,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:52,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:52,553 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:52,553 INFO L82 PathProgramCache]: Analyzing trace with hash 892796229, now seen corresponding path program 4 times [2021-08-21 18:52:52,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:52,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364177243] [2021-08-21 18:52:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:52,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:52,601 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 18:52:52,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:52,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364177243] [2021-08-21 18:52:52,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364177243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:52,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107036558] [2021-08-21 18:52:52,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:52:52,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:52,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:52,603 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 18:52:52,603 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 18:52:53,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:52:53,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:53,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:53,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107036558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:53,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:53,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:53,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236550252] [2021-08-21 18:52:53,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:53,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:53,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:53,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:53,668 INFO L87 Difference]: Start difference. First operand 4239 states and 10833 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:53,731 INFO L93 Difference]: Finished difference Result 4897 states and 12129 transitions. [2021-08-21 18:52:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:53,738 INFO L225 Difference]: With dead ends: 4897 [2021-08-21 18:52:53,738 INFO L226 Difference]: Without dead ends: 4890 [2021-08-21 18:52:53,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2021-08-21 18:52:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 4262. [2021-08-21 18:52:53,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4262 states, 4261 states have (on average 2.5604318235156067) internal successors, (10910), 4261 states have internal predecessors, (10910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:53,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 10910 transitions. [2021-08-21 18:52:53,794 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 10910 transitions. Word has length 29 [2021-08-21 18:52:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:53,794 INFO L470 AbstractCegarLoop]: Abstraction has 4262 states and 10910 transitions. [2021-08-21 18:52:53,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:53,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 10910 transitions. [2021-08-21 18:52:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:53,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:53,799 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:53,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:52:54,000 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,SelfDestructingSolverStorable95 [2021-08-21 18:52:54,000 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:54,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1086239385, now seen corresponding path program 1 times [2021-08-21 18:52:54,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:54,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981384976] [2021-08-21 18:52:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:54,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:54,041 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 18:52:54,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:54,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981384976] [2021-08-21 18:52:54,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981384976] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:54,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:54,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:54,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042675898] [2021-08-21 18:52:54,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:54,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:54,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:54,042 INFO L87 Difference]: Start difference. First operand 4262 states and 10910 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:54,099 INFO L93 Difference]: Finished difference Result 5000 states and 12313 transitions. [2021-08-21 18:52:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:54,106 INFO L225 Difference]: With dead ends: 5000 [2021-08-21 18:52:54,106 INFO L226 Difference]: Without dead ends: 4989 [2021-08-21 18:52:54,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2021-08-21 18:52:54,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 4301. [2021-08-21 18:52:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4301 states, 4300 states have (on average 2.558139534883721) internal successors, (11000), 4300 states have internal predecessors, (11000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4301 states to 4301 states and 11000 transitions. [2021-08-21 18:52:54,149 INFO L78 Accepts]: Start accepts. Automaton has 4301 states and 11000 transitions. Word has length 29 [2021-08-21 18:52:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:54,149 INFO L470 AbstractCegarLoop]: Abstraction has 4301 states and 11000 transitions. [2021-08-21 18:52:54,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4301 states and 11000 transitions. [2021-08-21 18:52:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:54,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:54,154 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:54,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-08-21 18:52:54,154 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:54,155 INFO L82 PathProgramCache]: Analyzing trace with hash -673136231, now seen corresponding path program 1 times [2021-08-21 18:52:54,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:54,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575678188] [2021-08-21 18:52:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:54,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:54,200 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 18:52:54,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:54,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575678188] [2021-08-21 18:52:54,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575678188] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:54,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:54,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:54,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847686569] [2021-08-21 18:52:54,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:54,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:54,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:54,201 INFO L87 Difference]: Start difference. First operand 4301 states and 11000 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:54,272 INFO L93 Difference]: Finished difference Result 5005 states and 12339 transitions. [2021-08-21 18:52:54,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:54,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:54,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:54,280 INFO L225 Difference]: With dead ends: 5005 [2021-08-21 18:52:54,280 INFO L226 Difference]: Without dead ends: 4998 [2021-08-21 18:52:54,280 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 18:52:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4998 states. [2021-08-21 18:52:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4998 to 4325. [2021-08-21 18:52:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4325 states, 4324 states have (on average 2.5642923219241442) internal successors, (11088), 4324 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 11088 transitions. [2021-08-21 18:52:54,327 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 11088 transitions. Word has length 29 [2021-08-21 18:52:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:54,327 INFO L470 AbstractCegarLoop]: Abstraction has 4325 states and 11088 transitions. [2021-08-21 18:52:54,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 11088 transitions. [2021-08-21 18:52:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:54,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:54,332 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] [2021-08-21 18:52:54,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-08-21 18:52:54,332 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:54,333 INFO L82 PathProgramCache]: Analyzing trace with hash 905694149, now seen corresponding path program 2 times [2021-08-21 18:52:54,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:54,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075089804] [2021-08-21 18:52:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:54,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:54,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:54,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075089804] [2021-08-21 18:52:54,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075089804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:54,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625468858] [2021-08-21 18:52:54,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:54,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:54,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:54,384 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 18:52:54,384 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 18:52:55,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:55,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:55,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:55,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625468858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:55,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:55,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:55,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437543403] [2021-08-21 18:52:55,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:55,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:55,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:55,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:55,491 INFO L87 Difference]: Start difference. First operand 4325 states and 11088 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:55,552 INFO L93 Difference]: Finished difference Result 4943 states and 12260 transitions. [2021-08-21 18:52:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:55,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:55,560 INFO L225 Difference]: With dead ends: 4943 [2021-08-21 18:52:55,560 INFO L226 Difference]: Without dead ends: 4936 [2021-08-21 18:52:55,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:52:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2021-08-21 18:52:55,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4342. [2021-08-21 18:52:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4341 states have (on average 2.563925362819627) internal successors, (11130), 4341 states have internal predecessors, (11130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 11130 transitions. [2021-08-21 18:52:55,614 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 11130 transitions. Word has length 29 [2021-08-21 18:52:55,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:55,614 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 11130 transitions. [2021-08-21 18:52:55,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 11130 transitions. [2021-08-21 18:52:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:55,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:55,620 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:55,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 18:52:55,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-21 18:52:55,821 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:55,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:55,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1533835323, now seen corresponding path program 1 times [2021-08-21 18:52:55,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:55,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401349278] [2021-08-21 18:52:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:55,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:55,870 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 18:52:55,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:55,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401349278] [2021-08-21 18:52:55,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401349278] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:52:55,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:52:55,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:52:55,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681112578] [2021-08-21 18:52:55,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:55,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:55,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:55,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:55,871 INFO L87 Difference]: Start difference. First operand 4342 states and 11130 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:55,973 INFO L93 Difference]: Finished difference Result 5115 states and 12569 transitions. [2021-08-21 18:52:55,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:55,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:55,982 INFO L225 Difference]: With dead ends: 5115 [2021-08-21 18:52:55,982 INFO L226 Difference]: Without dead ends: 5104 [2021-08-21 18:52:55,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 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 18:52:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-08-21 18:52:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4377. [2021-08-21 18:52:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 4376 states have (on average 2.5658135283363803) internal successors, (11228), 4376 states have internal predecessors, (11228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 11228 transitions. [2021-08-21 18:52:56,030 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 11228 transitions. Word has length 29 [2021-08-21 18:52:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:56,030 INFO L470 AbstractCegarLoop]: Abstraction has 4377 states and 11228 transitions. [2021-08-21 18:52:56,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 11228 transitions. [2021-08-21 18:52:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:56,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:56,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:56,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-08-21 18:52:56,035 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:56,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:56,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1581194683, now seen corresponding path program 5 times [2021-08-21 18:52:56,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:56,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599322329] [2021-08-21 18:52:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:56,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:56,078 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 18:52:56,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:56,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599322329] [2021-08-21 18:52:56,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599322329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:56,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356648903] [2021-08-21 18:52:56,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:56,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:56,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:56,080 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 18:52:56,080 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 18:52:57,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:57,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:57,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356648903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:57,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:57,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:57,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725276324] [2021-08-21 18:52:57,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:57,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:57,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:57,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:57,230 INFO L87 Difference]: Start difference. First operand 4377 states and 11228 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:57,310 INFO L93 Difference]: Finished difference Result 5045 states and 12530 transitions. [2021-08-21 18:52:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:57,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:57,318 INFO L225 Difference]: With dead ends: 5045 [2021-08-21 18:52:57,318 INFO L226 Difference]: Without dead ends: 5038 [2021-08-21 18:52:57,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:52:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5038 states. [2021-08-21 18:52:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5038 to 4415. [2021-08-21 18:52:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4414 states have (on average 2.579066606252832) internal successors, (11384), 4414 states have internal predecessors, (11384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 11384 transitions. [2021-08-21 18:52:57,374 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 11384 transitions. Word has length 29 [2021-08-21 18:52:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:57,374 INFO L470 AbstractCegarLoop]: Abstraction has 4415 states and 11384 transitions. [2021-08-21 18:52:57,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 11384 transitions. [2021-08-21 18:52:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:57,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:57,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:57,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 18:52:57,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:57,583 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash 384641345, now seen corresponding path program 5 times [2021-08-21 18:52:57,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:57,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259425153] [2021-08-21 18:52:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:57,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:57,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:57,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259425153] [2021-08-21 18:52:57,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259425153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:57,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74504836] [2021-08-21 18:52:57,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:52:57,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:57,626 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 18:52:57,627 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 18:52:58,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:52:58,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:52:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:52:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:52:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:58,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74504836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:58,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:52:58,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:52:58,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716702431] [2021-08-21 18:52:58,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:52:58,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:52:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:52:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:58,747 INFO L87 Difference]: Start difference. First operand 4415 states and 11384 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:52:58,824 INFO L93 Difference]: Finished difference Result 5105 states and 12731 transitions. [2021-08-21 18:52:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:52:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:52:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:52:58,832 INFO L225 Difference]: With dead ends: 5105 [2021-08-21 18:52:58,832 INFO L226 Difference]: Without dead ends: 5098 [2021-08-21 18:52:58,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:52:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5098 states. [2021-08-21 18:52:58,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 4464. [2021-08-21 18:52:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4464 states, 4463 states have (on average 2.5874971991933675) internal successors, (11548), 4463 states have internal predecessors, (11548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 11548 transitions. [2021-08-21 18:52:58,880 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 11548 transitions. Word has length 29 [2021-08-21 18:52:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:52:58,880 INFO L470 AbstractCegarLoop]: Abstraction has 4464 states and 11548 transitions. [2021-08-21 18:52:58,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:52:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 11548 transitions. [2021-08-21 18:52:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:52:58,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:52:58,886 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:52:58,905 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 18:52:59,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 18:52:59,089 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:52:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:52:59,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1944489923, now seen corresponding path program 2 times [2021-08-21 18:52:59,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:52:59,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872989836] [2021-08-21 18:52:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:52:59,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:52:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:52:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:52:59,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:52:59,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872989836] [2021-08-21 18:52:59,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872989836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:52:59,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886339580] [2021-08-21 18:52:59,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:52:59,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:52:59,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:52:59,130 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 18:52:59,147 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 18:53:00,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:00,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:00,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:00,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:00,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886339580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:00,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:00,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:00,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935267591] [2021-08-21 18:53:00,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:00,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:00,271 INFO L87 Difference]: Start difference. First operand 4464 states and 11548 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:00,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:00,349 INFO L93 Difference]: Finished difference Result 5082 states and 12734 transitions. [2021-08-21 18:53:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:00,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:00,359 INFO L225 Difference]: With dead ends: 5082 [2021-08-21 18:53:00,359 INFO L226 Difference]: Without dead ends: 5075 [2021-08-21 18:53:00,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-08-21 18:53:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4480. [2021-08-21 18:53:00,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4479 states have (on average 2.5932127707077473) internal successors, (11615), 4479 states have internal predecessors, (11615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 11615 transitions. [2021-08-21 18:53:00,423 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 11615 transitions. Word has length 29 [2021-08-21 18:53:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:00,423 INFO L470 AbstractCegarLoop]: Abstraction has 4480 states and 11615 transitions. [2021-08-21 18:53:00,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 11615 transitions. [2021-08-21 18:53:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:00,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:00,430 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:00,450 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 18:53:00,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 18:53:00,630 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:00,631 INFO L82 PathProgramCache]: Analyzing trace with hash 21346105, now seen corresponding path program 2 times [2021-08-21 18:53:00,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:00,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260879418] [2021-08-21 18:53:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:00,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:00,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:00,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260879418] [2021-08-21 18:53:00,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260879418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:00,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945605566] [2021-08-21 18:53:00,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:53:00,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:00,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:00,676 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 18:53:00,696 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 18:53:01,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:01,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:01,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:01,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:01,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945605566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:01,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:01,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:01,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294706385] [2021-08-21 18:53:01,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:01,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:01,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:01,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:01,899 INFO L87 Difference]: Start difference. First operand 4480 states and 11615 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:01,966 INFO L93 Difference]: Finished difference Result 5137 states and 12885 transitions. [2021-08-21 18:53:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:01,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:01,974 INFO L225 Difference]: With dead ends: 5137 [2021-08-21 18:53:01,974 INFO L226 Difference]: Without dead ends: 5130 [2021-08-21 18:53:01,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:53:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5130 states. [2021-08-21 18:53:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5130 to 4507. [2021-08-21 18:53:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4506 states have (on average 2.5992010652463384) internal successors, (11712), 4506 states have internal predecessors, (11712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 11712 transitions. [2021-08-21 18:53:02,023 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 11712 transitions. Word has length 29 [2021-08-21 18:53:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:02,023 INFO L470 AbstractCegarLoop]: Abstraction has 4507 states and 11712 transitions. [2021-08-21 18:53:02,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 11712 transitions. [2021-08-21 18:53:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:02,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:02,029 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] [2021-08-21 18:53:02,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 18:53:02,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 18:53:02,229 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:02,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:02,229 INFO L82 PathProgramCache]: Analyzing trace with hash -724487175, now seen corresponding path program 3 times [2021-08-21 18:53:02,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:02,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614942058] [2021-08-21 18:53:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:02,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:02,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:02,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614942058] [2021-08-21 18:53:02,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614942058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:02,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85495553] [2021-08-21 18:53:02,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:02,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:02,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:02,273 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 18:53:02,273 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 18:53:03,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:03,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:03,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:03,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:03,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85495553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:03,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:03,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:03,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098582454] [2021-08-21 18:53:03,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:03,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:03,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:03,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:03,441 INFO L87 Difference]: Start difference. First operand 4507 states and 11712 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:03,509 INFO L93 Difference]: Finished difference Result 5155 states and 12965 transitions. [2021-08-21 18:53:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:03,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:03,516 INFO L225 Difference]: With dead ends: 5155 [2021-08-21 18:53:03,516 INFO L226 Difference]: Without dead ends: 5148 [2021-08-21 18:53:03,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5148 states. [2021-08-21 18:53:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5148 to 4519. [2021-08-21 18:53:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4519 states, 4518 states have (on average 2.6038069942452413) internal successors, (11764), 4518 states have internal predecessors, (11764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4519 states to 4519 states and 11764 transitions. [2021-08-21 18:53:03,563 INFO L78 Accepts]: Start accepts. Automaton has 4519 states and 11764 transitions. Word has length 29 [2021-08-21 18:53:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:03,564 INFO L470 AbstractCegarLoop]: Abstraction has 4519 states and 11764 transitions. [2021-08-21 18:53:03,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4519 states and 11764 transitions. [2021-08-21 18:53:03,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:03,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:03,569 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:03,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 18:53:03,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:03,773 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:03,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash 988954445, now seen corresponding path program 3 times [2021-08-21 18:53:03,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:03,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676213383] [2021-08-21 18:53:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:03,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:03,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:03,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676213383] [2021-08-21 18:53:03,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676213383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:03,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68192073] [2021-08-21 18:53:03,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:03,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:03,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:03,838 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 18:53:03,852 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 18:53:04,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:04,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:05,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68192073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:05,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:05,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:05,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955305559] [2021-08-21 18:53:05,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:05,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:05,025 INFO L87 Difference]: Start difference. First operand 4519 states and 11764 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:05,092 INFO L93 Difference]: Finished difference Result 5227 states and 13090 transitions. [2021-08-21 18:53:05,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:05,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 18:53:05,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:05,099 INFO L225 Difference]: With dead ends: 5227 [2021-08-21 18:53:05,099 INFO L226 Difference]: Without dead ends: 5216 [2021-08-21 18:53:05,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:53:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2021-08-21 18:53:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 4535. [2021-08-21 18:53:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4535 states, 4534 states have (on average 2.6060873400970443) internal successors, (11816), 4534 states have internal predecessors, (11816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 11816 transitions. [2021-08-21 18:53:05,159 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 11816 transitions. Word has length 29 [2021-08-21 18:53:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:05,159 INFO L470 AbstractCegarLoop]: Abstraction has 4535 states and 11816 transitions. [2021-08-21 18:53:05,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 11816 transitions. [2021-08-21 18:53:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:05,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:05,165 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] [2021-08-21 18:53:05,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:05,365 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,SelfDestructingSolverStorable105 [2021-08-21 18:53:05,365 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -770421171, now seen corresponding path program 3 times [2021-08-21 18:53:05,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:05,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292281693] [2021-08-21 18:53:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:05,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:05,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:05,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292281693] [2021-08-21 18:53:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292281693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:05,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935721123] [2021-08-21 18:53:05,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:05,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:05,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:05,411 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 18:53:05,411 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 18:53:06,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:06,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:06,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935721123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:06,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:06,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:06,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503065916] [2021-08-21 18:53:06,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:06,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,619 INFO L87 Difference]: Start difference. First operand 4535 states and 11816 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:06,690 INFO L93 Difference]: Finished difference Result 5242 states and 13188 transitions. [2021-08-21 18:53:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:06,697 INFO L225 Difference]: With dead ends: 5242 [2021-08-21 18:53:06,697 INFO L226 Difference]: Without dead ends: 5235 [2021-08-21 18:53:06,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5235 states. [2021-08-21 18:53:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5235 to 4570. [2021-08-21 18:53:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 2.6158896913985554) internal successors, (11952), 4569 states have internal predecessors, (11952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 11952 transitions. [2021-08-21 18:53:06,751 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 11952 transitions. Word has length 29 [2021-08-21 18:53:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:06,751 INFO L470 AbstractCegarLoop]: Abstraction has 4570 states and 11952 transitions. [2021-08-21 18:53:06,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 11952 transitions. [2021-08-21 18:53:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:06,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:06,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:06,779 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 18:53:06,960 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,SelfDestructingSolverStorable106 [2021-08-21 18:53:06,961 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:06,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:06,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1840410811, now seen corresponding path program 6 times [2021-08-21 18:53:06,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:06,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702992223] [2021-08-21 18:53:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:06,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:07,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:07,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702992223] [2021-08-21 18:53:07,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702992223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:07,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298681846] [2021-08-21 18:53:07,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:07,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:07,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:07,020 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 18:53:07,020 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 18:53:08,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:53:08,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:08,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:08,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:08,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298681846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:08,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:08,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:08,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528516465] [2021-08-21 18:53:08,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:08,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,216 INFO L87 Difference]: Start difference. First operand 4570 states and 11952 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:08,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:08,292 INFO L93 Difference]: Finished difference Result 5129 states and 13062 transitions. [2021-08-21 18:53:08,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:08,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:08,299 INFO L225 Difference]: With dead ends: 5129 [2021-08-21 18:53:08,299 INFO L226 Difference]: Without dead ends: 5122 [2021-08-21 18:53:08,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:08,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2021-08-21 18:53:08,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 4591. [2021-08-21 18:53:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 2.623529411764706) internal successors, (12042), 4590 states have internal predecessors, (12042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 12042 transitions. [2021-08-21 18:53:08,369 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 12042 transitions. Word has length 29 [2021-08-21 18:53:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:08,369 INFO L470 AbstractCegarLoop]: Abstraction has 4591 states and 12042 transitions. [2021-08-21 18:53:08,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 12042 transitions. [2021-08-21 18:53:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:08,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:08,376 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:08,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 18:53:08,576 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,SelfDestructingSolverStorable107 [2021-08-21 18:53:08,576 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:08,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2043017281, now seen corresponding path program 6 times [2021-08-21 18:53:08,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:08,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892037179] [2021-08-21 18:53:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:08,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:08,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:08,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892037179] [2021-08-21 18:53:08,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892037179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:08,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401845861] [2021-08-21 18:53:08,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:08,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:08,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:08,622 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 18:53:08,624 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 18:53:09,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:53:09,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:09,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:09,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:09,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401845861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:09,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:09,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:09,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909968963] [2021-08-21 18:53:09,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:09,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:09,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:09,878 INFO L87 Difference]: Start difference. First operand 4591 states and 12042 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:09,952 INFO L93 Difference]: Finished difference Result 5165 states and 13181 transitions. [2021-08-21 18:53:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:09,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:09,959 INFO L225 Difference]: With dead ends: 5165 [2021-08-21 18:53:09,959 INFO L226 Difference]: Without dead ends: 5158 [2021-08-21 18:53:09,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:53:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-08-21 18:53:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 4619. [2021-08-21 18:53:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 4618 states have (on average 2.6292767431788655) internal successors, (12142), 4618 states have internal predecessors, (12142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 12142 transitions. [2021-08-21 18:53:10,012 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 12142 transitions. Word has length 29 [2021-08-21 18:53:10,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:10,012 INFO L470 AbstractCegarLoop]: Abstraction has 4619 states and 12142 transitions. [2021-08-21 18:53:10,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 12142 transitions. [2021-08-21 18:53:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:10,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:10,018 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] [2021-08-21 18:53:10,039 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 18:53:10,218 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,SelfDestructingSolverStorable108 [2021-08-21 18:53:10,218 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:10,219 INFO L82 PathProgramCache]: Analyzing trace with hash 975227461, now seen corresponding path program 5 times [2021-08-21 18:53:10,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:10,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416299335] [2021-08-21 18:53:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:10,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:10,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:10,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416299335] [2021-08-21 18:53:10,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416299335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:10,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815086754] [2021-08-21 18:53:10,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:10,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:10,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:10,263 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 18:53:10,263 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 18:53:11,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:11,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:11,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:11,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815086754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:11,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:11,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:11,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371458796] [2021-08-21 18:53:11,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:11,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:11,518 INFO L87 Difference]: Start difference. First operand 4619 states and 12142 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:11,590 INFO L93 Difference]: Finished difference Result 5239 states and 13374 transitions. [2021-08-21 18:53:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:11,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:11,598 INFO L225 Difference]: With dead ends: 5239 [2021-08-21 18:53:11,598 INFO L226 Difference]: Without dead ends: 5232 [2021-08-21 18:53:11,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2021-08-21 18:53:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 4665. [2021-08-21 18:53:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 2.6297169811320753) internal successors, (12265), 4664 states have internal predecessors, (12265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 12265 transitions. [2021-08-21 18:53:11,653 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 12265 transitions. Word has length 29 [2021-08-21 18:53:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:11,653 INFO L470 AbstractCegarLoop]: Abstraction has 4665 states and 12265 transitions. [2021-08-21 18:53:11,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 12265 transitions. [2021-08-21 18:53:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:11,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:11,660 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:11,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 18:53:11,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:11,861 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash 196306513, now seen corresponding path program 6 times [2021-08-21 18:53:11,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:11,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193837884] [2021-08-21 18:53:11,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:11,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:11,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:11,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193837884] [2021-08-21 18:53:11,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193837884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:11,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6944214] [2021-08-21 18:53:11,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:11,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:11,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:11,909 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 18:53:11,910 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 18:53:13,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:53:13,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:13,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:13,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:13,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6944214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:13,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:13,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:13,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427934498] [2021-08-21 18:53:13,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:13,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:13,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:13,177 INFO L87 Difference]: Start difference. First operand 4665 states and 12265 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:13,240 INFO L93 Difference]: Finished difference Result 5250 states and 13403 transitions. [2021-08-21 18:53:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:13,248 INFO L225 Difference]: With dead ends: 5250 [2021-08-21 18:53:13,248 INFO L226 Difference]: Without dead ends: 5243 [2021-08-21 18:53:13,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:53:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5243 states. [2021-08-21 18:53:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5243 to 4693. [2021-08-21 18:53:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 2.6319266837169653) internal successors, (12349), 4692 states have internal predecessors, (12349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 12349 transitions. [2021-08-21 18:53:13,304 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 12349 transitions. Word has length 29 [2021-08-21 18:53:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:13,304 INFO L470 AbstractCegarLoop]: Abstraction has 4693 states and 12349 transitions. [2021-08-21 18:53:13,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 12349 transitions. [2021-08-21 18:53:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:13,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:13,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:13,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:13,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:13,530 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:13,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:13,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1527789823, now seen corresponding path program 3 times [2021-08-21 18:53:13,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:13,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923496017] [2021-08-21 18:53:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:13,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:13,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:13,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923496017] [2021-08-21 18:53:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923496017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:13,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468410044] [2021-08-21 18:53:13,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:13,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:13,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:13,575 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 18:53:13,576 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 18:53:14,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:14,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:14,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:14,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:14,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468410044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:14,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:14,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:14,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623266852] [2021-08-21 18:53:14,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:14,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:14,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:14,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:14,879 INFO L87 Difference]: Start difference. First operand 4693 states and 12349 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:14,940 INFO L93 Difference]: Finished difference Result 5346 states and 13606 transitions. [2021-08-21 18:53:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:14,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:14,949 INFO L225 Difference]: With dead ends: 5346 [2021-08-21 18:53:14,949 INFO L226 Difference]: Without dead ends: 5339 [2021-08-21 18:53:14,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:53:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2021-08-21 18:53:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 4721. [2021-08-21 18:53:14,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4721 states, 4720 states have (on average 2.632415254237288) internal successors, (12425), 4720 states have internal predecessors, (12425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 12425 transitions. [2021-08-21 18:53:15,007 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 12425 transitions. Word has length 29 [2021-08-21 18:53:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:15,007 INFO L470 AbstractCegarLoop]: Abstraction has 4721 states and 12425 transitions. [2021-08-21 18:53:15,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 12425 transitions. [2021-08-21 18:53:15,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:15,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:15,014 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] [2021-08-21 18:53:15,033 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 18:53:15,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 18:53:15,223 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:15,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:15,223 INFO L82 PathProgramCache]: Analyzing trace with hash 185651797, now seen corresponding path program 3 times [2021-08-21 18:53:15,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:15,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190061495] [2021-08-21 18:53:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:15,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:15,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:15,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190061495] [2021-08-21 18:53:15,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190061495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:15,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787292889] [2021-08-21 18:53:15,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:15,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:15,271 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 18:53:15,271 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 18:53:16,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:16,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:16,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:16,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787292889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:16,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:16,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:16,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567655835] [2021-08-21 18:53:16,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:16,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:16,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:16,602 INFO L87 Difference]: Start difference. First operand 4721 states and 12425 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:16,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:16,657 INFO L93 Difference]: Finished difference Result 5441 states and 13774 transitions. [2021-08-21 18:53:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:16,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:16,666 INFO L225 Difference]: With dead ends: 5441 [2021-08-21 18:53:16,666 INFO L226 Difference]: Without dead ends: 5430 [2021-08-21 18:53:16,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:53:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2021-08-21 18:53:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 4756. [2021-08-21 18:53:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4756 states, 4755 states have (on average 2.628601472134595) internal successors, (12499), 4755 states have internal predecessors, (12499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4756 states to 4756 states and 12499 transitions. [2021-08-21 18:53:16,750 INFO L78 Accepts]: Start accepts. Automaton has 4756 states and 12499 transitions. Word has length 29 [2021-08-21 18:53:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:16,750 INFO L470 AbstractCegarLoop]: Abstraction has 4756 states and 12499 transitions. [2021-08-21 18:53:16,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4756 states and 12499 transitions. [2021-08-21 18:53:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:16,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:16,756 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] [2021-08-21 18:53:16,776 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 18:53:16,956 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,SelfDestructingSolverStorable112 [2021-08-21 18:53:16,956 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1573723819, now seen corresponding path program 3 times [2021-08-21 18:53:16,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:16,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000991860] [2021-08-21 18:53:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:16,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:17,001 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 18:53:17,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:17,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000991860] [2021-08-21 18:53:17,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000991860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:17,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268373409] [2021-08-21 18:53:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:17,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:17,003 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 18:53:17,016 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 18:53:18,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:18,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:18,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:18,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:18,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268373409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:18,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:18,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:18,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658696087] [2021-08-21 18:53:18,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:18,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:18,323 INFO L87 Difference]: Start difference. First operand 4756 states and 12499 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:18,386 INFO L93 Difference]: Finished difference Result 5469 states and 13871 transitions. [2021-08-21 18:53:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:18,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:18,395 INFO L225 Difference]: With dead ends: 5469 [2021-08-21 18:53:18,395 INFO L226 Difference]: Without dead ends: 5462 [2021-08-21 18:53:18,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:53:18,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2021-08-21 18:53:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 4789. [2021-08-21 18:53:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4789 states, 4788 states have (on average 2.6319966583124477) internal successors, (12602), 4788 states have internal predecessors, (12602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 12602 transitions. [2021-08-21 18:53:18,456 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 12602 transitions. Word has length 29 [2021-08-21 18:53:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:18,456 INFO L470 AbstractCegarLoop]: Abstraction has 4789 states and 12602 transitions. [2021-08-21 18:53:18,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:18,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 12602 transitions. [2021-08-21 18:53:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:18,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:18,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:18,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 18:53:18,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 18:53:18,663 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:18,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:18,663 INFO L82 PathProgramCache]: Analyzing trace with hash -99311875, now seen corresponding path program 3 times [2021-08-21 18:53:18,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:18,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629136239] [2021-08-21 18:53:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:18,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:18,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:18,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629136239] [2021-08-21 18:53:18,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629136239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:18,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917145218] [2021-08-21 18:53:18,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:18,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:18,710 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 18:53:18,711 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 18:53:19,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:19,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:19,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:19,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:20,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917145218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:20,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:20,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:20,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925481735] [2021-08-21 18:53:20,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:20,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:20,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:20,047 INFO L87 Difference]: Start difference. First operand 4789 states and 12602 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:20,116 INFO L93 Difference]: Finished difference Result 5449 states and 13871 transitions. [2021-08-21 18:53:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:20,123 INFO L225 Difference]: With dead ends: 5449 [2021-08-21 18:53:20,123 INFO L226 Difference]: Without dead ends: 5442 [2021-08-21 18:53:20,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:53:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2021-08-21 18:53:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 4835. [2021-08-21 18:53:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4834 states have (on average 2.6303268514687628) internal successors, (12715), 4834 states have internal predecessors, (12715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 12715 transitions. [2021-08-21 18:53:20,181 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 12715 transitions. Word has length 29 [2021-08-21 18:53:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:20,181 INFO L470 AbstractCegarLoop]: Abstraction has 4835 states and 12715 transitions. [2021-08-21 18:53:20,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 12715 transitions. [2021-08-21 18:53:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:20,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:20,187 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] [2021-08-21 18:53:20,207 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 18:53:20,388 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,SelfDestructingSolverStorable114 [2021-08-21 18:53:20,388 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1614129745, now seen corresponding path program 3 times [2021-08-21 18:53:20,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:20,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205602562] [2021-08-21 18:53:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:20,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:20,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:20,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205602562] [2021-08-21 18:53:20,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205602562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:20,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892671697] [2021-08-21 18:53:20,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:20,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:20,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:20,435 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 18:53:20,436 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 18:53:21,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:21,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:21,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:21,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:21,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892671697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:21,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:21,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:21,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385256822] [2021-08-21 18:53:21,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:21,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:21,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:21,805 INFO L87 Difference]: Start difference. First operand 4835 states and 12715 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:21,861 INFO L93 Difference]: Finished difference Result 5561 states and 14071 transitions. [2021-08-21 18:53:21,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:21,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:21,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:21,869 INFO L225 Difference]: With dead ends: 5561 [2021-08-21 18:53:21,869 INFO L226 Difference]: Without dead ends: 5550 [2021-08-21 18:53:21,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:53:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-08-21 18:53:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 4892. [2021-08-21 18:53:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4892 states, 4891 states have (on average 2.622572071151094) internal successors, (12827), 4891 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4892 states to 4892 states and 12827 transitions. [2021-08-21 18:53:21,921 INFO L78 Accepts]: Start accepts. Automaton has 4892 states and 12827 transitions. Word has length 29 [2021-08-21 18:53:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:21,922 INFO L470 AbstractCegarLoop]: Abstraction has 4892 states and 12827 transitions. [2021-08-21 18:53:21,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 4892 states and 12827 transitions. [2021-08-21 18:53:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:21,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:21,929 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] [2021-08-21 18:53:21,949 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 18:53:22,129 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,SelfDestructingSolverStorable115 [2021-08-21 18:53:22,130 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash -145245871, now seen corresponding path program 3 times [2021-08-21 18:53:22,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:22,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370590110] [2021-08-21 18:53:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:22,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:22,185 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 18:53:22,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:22,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370590110] [2021-08-21 18:53:22,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370590110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:22,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185728043] [2021-08-21 18:53:22,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:22,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:22,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:22,187 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 18:53:22,200 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 18:53:23,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:23,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:23,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:23,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185728043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:23,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:23,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:23,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038401012] [2021-08-21 18:53:23,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:23,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:23,607 INFO L87 Difference]: Start difference. First operand 4892 states and 12827 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:23,670 INFO L93 Difference]: Finished difference Result 5612 states and 14212 transitions. [2021-08-21 18:53:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:23,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:23,679 INFO L225 Difference]: With dead ends: 5612 [2021-08-21 18:53:23,679 INFO L226 Difference]: Without dead ends: 5605 [2021-08-21 18:53:23,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2021-08-21 18:53:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 4925. [2021-08-21 18:53:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4925 states, 4924 states have (on average 2.623476848090983) internal successors, (12918), 4924 states have internal predecessors, (12918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4925 states to 4925 states and 12918 transitions. [2021-08-21 18:53:23,749 INFO L78 Accepts]: Start accepts. Automaton has 4925 states and 12918 transitions. Word has length 29 [2021-08-21 18:53:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:23,749 INFO L470 AbstractCegarLoop]: Abstraction has 4925 states and 12918 transitions. [2021-08-21 18:53:23,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4925 states and 12918 transitions. [2021-08-21 18:53:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:23,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:23,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:23,775 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 18:53:23,955 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,SelfDestructingSolverStorable116 [2021-08-21 18:53:23,956 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash -571071815, now seen corresponding path program 5 times [2021-08-21 18:53:23,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:23,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936236449] [2021-08-21 18:53:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:23,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:24,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:24,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936236449] [2021-08-21 18:53:24,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936236449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:24,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393109107] [2021-08-21 18:53:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:24,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:24,005 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 18:53:24,032 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 18:53:25,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:25,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:25,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:25,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393109107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:25,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:25,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:25,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332135536] [2021-08-21 18:53:25,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:25,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:25,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:25,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:25,523 INFO L87 Difference]: Start difference. First operand 4925 states and 12918 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:25,589 INFO L93 Difference]: Finished difference Result 5486 states and 14038 transitions. [2021-08-21 18:53:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:25,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:25,596 INFO L225 Difference]: With dead ends: 5486 [2021-08-21 18:53:25,596 INFO L226 Difference]: Without dead ends: 5479 [2021-08-21 18:53:25,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:53:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5479 states. [2021-08-21 18:53:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5479 to 4943. [2021-08-21 18:53:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4943 states, 4942 states have (on average 2.6254552812626466) internal successors, (12975), 4942 states have internal predecessors, (12975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 12975 transitions. [2021-08-21 18:53:25,653 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 12975 transitions. Word has length 29 [2021-08-21 18:53:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:25,653 INFO L470 AbstractCegarLoop]: Abstraction has 4943 states and 12975 transitions. [2021-08-21 18:53:25,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 12975 transitions. [2021-08-21 18:53:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:25,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:25,659 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:25,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 18:53:25,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:25,859 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:25,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1609223757, now seen corresponding path program 6 times [2021-08-21 18:53:25,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:25,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525035607] [2021-08-21 18:53:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:25,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:25,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:25,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525035607] [2021-08-21 18:53:25,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525035607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:25,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757134440] [2021-08-21 18:53:25,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:25,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:25,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:25,908 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 18:53:25,909 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 18:53:27,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:53:27,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:27,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:27,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757134440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:27,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:27,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:27,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507089699] [2021-08-21 18:53:27,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:27,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:27,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:27,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:27,313 INFO L87 Difference]: Start difference. First operand 4943 states and 12975 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:27,381 INFO L93 Difference]: Finished difference Result 5485 states and 14046 transitions. [2021-08-21 18:53:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:27,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:27,390 INFO L225 Difference]: With dead ends: 5485 [2021-08-21 18:53:27,390 INFO L226 Difference]: Without dead ends: 5478 [2021-08-21 18:53:27,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:53:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-08-21 18:53:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 4957. [2021-08-21 18:53:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 2.6287328490718322) internal successors, (13028), 4956 states have internal predecessors, (13028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:27,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 13028 transitions. [2021-08-21 18:53:27,448 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 13028 transitions. Word has length 29 [2021-08-21 18:53:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:27,448 INFO L470 AbstractCegarLoop]: Abstraction has 4957 states and 13028 transitions. [2021-08-21 18:53:27,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:27,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 13028 transitions. [2021-08-21 18:53:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:27,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:27,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:27,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:27,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:27,656 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash -443885251, now seen corresponding path program 5 times [2021-08-21 18:53:27,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:27,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921351468] [2021-08-21 18:53:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:27,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:27,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:27,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921351468] [2021-08-21 18:53:27,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921351468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:27,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929818472] [2021-08-21 18:53:27,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:27,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:27,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:27,703 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 18:53:27,704 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 18:53:28,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:28,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:29,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929818472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:29,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:29,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:29,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798869483] [2021-08-21 18:53:29,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:29,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:29,111 INFO L87 Difference]: Start difference. First operand 4957 states and 13028 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:29,181 INFO L93 Difference]: Finished difference Result 5531 states and 14169 transitions. [2021-08-21 18:53:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:29,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:29,188 INFO L225 Difference]: With dead ends: 5531 [2021-08-21 18:53:29,188 INFO L226 Difference]: Without dead ends: 5524 [2021-08-21 18:53:29,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:29,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-08-21 18:53:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 4975. [2021-08-21 18:53:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4974 states have (on average 2.6298753518295133) internal successors, (13081), 4974 states have internal predecessors, (13081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 13081 transitions. [2021-08-21 18:53:29,268 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 13081 transitions. Word has length 29 [2021-08-21 18:53:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:29,268 INFO L470 AbstractCegarLoop]: Abstraction has 4975 states and 13081 transitions. [2021-08-21 18:53:29,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 13081 transitions. [2021-08-21 18:53:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:29,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:29,274 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 18:53:29,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 18:53:29,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-21 18:53:29,475 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:29,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:29,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1222806199, now seen corresponding path program 6 times [2021-08-21 18:53:29,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:29,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849908218] [2021-08-21 18:53:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:29,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:29,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:29,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849908218] [2021-08-21 18:53:29,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849908218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:29,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389017294] [2021-08-21 18:53:29,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:29,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:29,521 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 18:53:29,522 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 18:53:30,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:53:30,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:30,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:30,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389017294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:30,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:30,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:30,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374468608] [2021-08-21 18:53:30,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:30,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:30,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:30,984 INFO L87 Difference]: Start difference. First operand 4975 states and 13081 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:31,050 INFO L93 Difference]: Finished difference Result 5526 states and 14164 transitions. [2021-08-21 18:53:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:31,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:31,057 INFO L225 Difference]: With dead ends: 5526 [2021-08-21 18:53:31,057 INFO L226 Difference]: Without dead ends: 5519 [2021-08-21 18:53:31,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:53:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5519 states. [2021-08-21 18:53:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5519 to 4989. [2021-08-21 18:53:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4989 states, 4988 states have (on average 2.632317562149158) internal successors, (13130), 4988 states have internal predecessors, (13130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4989 states to 4989 states and 13130 transitions. [2021-08-21 18:53:31,108 INFO L78 Accepts]: Start accepts. Automaton has 4989 states and 13130 transitions. Word has length 29 [2021-08-21 18:53:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:31,108 INFO L470 AbstractCegarLoop]: Abstraction has 4989 states and 13130 transitions. [2021-08-21 18:53:31,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:31,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4989 states and 13130 transitions. [2021-08-21 18:53:31,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:31,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:31,114 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:31,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 18:53:31,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:31,315 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:31,315 INFO L82 PathProgramCache]: Analyzing trace with hash -698258379, now seen corresponding path program 4 times [2021-08-21 18:53:31,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:31,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199590993] [2021-08-21 18:53:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:31,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:31,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:31,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199590993] [2021-08-21 18:53:31,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199590993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:31,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323435798] [2021-08-21 18:53:31,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:53:31,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:31,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:31,360 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 18:53:31,361 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 18:53:32,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:53:32,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:32,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:32,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323435798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:32,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:32,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:32,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888517561] [2021-08-21 18:53:32,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:32,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:32,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:32,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:32,812 INFO L87 Difference]: Start difference. First operand 4989 states and 13130 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:32,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:32,880 INFO L93 Difference]: Finished difference Result 5570 states and 14275 transitions. [2021-08-21 18:53:32,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:32,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:32,888 INFO L225 Difference]: With dead ends: 5570 [2021-08-21 18:53:32,888 INFO L226 Difference]: Without dead ends: 5563 [2021-08-21 18:53:32,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:53:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2021-08-21 18:53:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5007. [2021-08-21 18:53:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5007 states, 5006 states have (on average 2.6350379544546545) internal successors, (13191), 5006 states have internal predecessors, (13191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5007 states to 5007 states and 13191 transitions. [2021-08-21 18:53:32,943 INFO L78 Accepts]: Start accepts. Automaton has 5007 states and 13191 transitions. Word has length 29 [2021-08-21 18:53:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:32,943 INFO L470 AbstractCegarLoop]: Abstraction has 5007 states and 13191 transitions. [2021-08-21 18:53:32,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 5007 states and 13191 transitions. [2021-08-21 18:53:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:32,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:32,949 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:32,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 18:53:33,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:33,150 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:33,150 INFO L82 PathProgramCache]: Analyzing trace with hash 146286417, now seen corresponding path program 5 times [2021-08-21 18:53:33,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:33,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857330533] [2021-08-21 18:53:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:33,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:33,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:33,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857330533] [2021-08-21 18:53:33,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857330533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:33,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442366092] [2021-08-21 18:53:33,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:33,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:33,197 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 18:53:33,220 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 18:53:34,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:34,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:34,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:34,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442366092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:34,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:34,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:34,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774728045] [2021-08-21 18:53:34,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:34,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:34,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:34,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:34,663 INFO L87 Difference]: Start difference. First operand 5007 states and 13191 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:34,738 INFO L93 Difference]: Finished difference Result 5561 states and 14271 transitions. [2021-08-21 18:53:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:34,745 INFO L225 Difference]: With dead ends: 5561 [2021-08-21 18:53:34,745 INFO L226 Difference]: Without dead ends: 5554 [2021-08-21 18:53:34,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2021-08-21 18:53:34,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 5021. [2021-08-21 18:53:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5021 states, 5020 states have (on average 2.6390438247011954) internal successors, (13248), 5020 states have internal predecessors, (13248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5021 states to 5021 states and 13248 transitions. [2021-08-21 18:53:34,821 INFO L78 Accepts]: Start accepts. Automaton has 5021 states and 13248 transitions. Word has length 29 [2021-08-21 18:53:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:34,822 INFO L470 AbstractCegarLoop]: Abstraction has 5021 states and 13248 transitions. [2021-08-21 18:53:34,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 5021 states and 13248 transitions. [2021-08-21 18:53:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:34,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:34,827 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:34,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 18:53:35,028 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,SelfDestructingSolverStorable122 [2021-08-21 18:53:35,028 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:35,028 INFO L82 PathProgramCache]: Analyzing trace with hash -89778423, now seen corresponding path program 3 times [2021-08-21 18:53:35,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:35,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164222169] [2021-08-21 18:53:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:35,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:35,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:35,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164222169] [2021-08-21 18:53:35,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164222169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:35,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207531012] [2021-08-21 18:53:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:35,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:35,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:35,086 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 18:53:35,086 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 18:53:36,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:36,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:36,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207531012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:36,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:36,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:36,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575664873] [2021-08-21 18:53:36,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:36,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:36,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:36,570 INFO L87 Difference]: Start difference. First operand 5021 states and 13248 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:36,631 INFO L93 Difference]: Finished difference Result 5656 states and 14481 transitions. [2021-08-21 18:53:36,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:36,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:36,639 INFO L225 Difference]: With dead ends: 5656 [2021-08-21 18:53:36,639 INFO L226 Difference]: Without dead ends: 5649 [2021-08-21 18:53:36,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:36,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5649 states. [2021-08-21 18:53:36,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5649 to 5033. [2021-08-21 18:53:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5033 states, 5032 states have (on average 2.6414944356120826) internal successors, (13292), 5032 states have internal predecessors, (13292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5033 states to 5033 states and 13292 transitions. [2021-08-21 18:53:36,696 INFO L78 Accepts]: Start accepts. Automaton has 5033 states and 13292 transitions. Word has length 29 [2021-08-21 18:53:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:36,696 INFO L470 AbstractCegarLoop]: Abstraction has 5033 states and 13292 transitions. [2021-08-21 18:53:36,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 5033 states and 13292 transitions. [2021-08-21 18:53:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:36,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:36,703 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] [2021-08-21 18:53:36,724 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 18:53:36,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:36,924 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:36,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:36,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1623663197, now seen corresponding path program 3 times [2021-08-21 18:53:36,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:36,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006117556] [2021-08-21 18:53:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:36,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:36,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:36,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006117556] [2021-08-21 18:53:36,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006117556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:36,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568576769] [2021-08-21 18:53:36,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:36,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:36,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:36,970 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 18:53:36,971 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 18:53:38,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:53:38,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:38,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568576769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:38,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:38,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:38,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215170491] [2021-08-21 18:53:38,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:38,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:38,468 INFO L87 Difference]: Start difference. First operand 5033 states and 13292 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:38,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:38,525 INFO L93 Difference]: Finished difference Result 5732 states and 14599 transitions. [2021-08-21 18:53:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:38,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:38,532 INFO L225 Difference]: With dead ends: 5732 [2021-08-21 18:53:38,532 INFO L226 Difference]: Without dead ends: 5721 [2021-08-21 18:53:38,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-08-21 18:53:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 5049. [2021-08-21 18:53:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5049 states, 5048 states have (on average 2.640649762282092) internal successors, (13330), 5048 states have internal predecessors, (13330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5049 states to 5049 states and 13330 transitions. [2021-08-21 18:53:38,585 INFO L78 Accepts]: Start accepts. Automaton has 5049 states and 13330 transitions. Word has length 29 [2021-08-21 18:53:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:38,585 INFO L470 AbstractCegarLoop]: Abstraction has 5049 states and 13330 transitions. [2021-08-21 18:53:38,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 5049 states and 13330 transitions. [2021-08-21 18:53:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:38,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:38,591 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:38,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:38,791 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,SelfDestructingSolverStorable124 [2021-08-21 18:53:38,792 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:38,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:38,792 INFO L82 PathProgramCache]: Analyzing trace with hash -135712419, now seen corresponding path program 6 times [2021-08-21 18:53:38,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:38,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634299923] [2021-08-21 18:53:38,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:38,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:38,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:38,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634299923] [2021-08-21 18:53:38,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634299923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:38,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325716468] [2021-08-21 18:53:38,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:38,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:38,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:38,837 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 18:53:38,837 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 18:53:40,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:53:40,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:40,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325716468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:40,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:40,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:40,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857923628] [2021-08-21 18:53:40,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:40,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:40,356 INFO L87 Difference]: Start difference. First operand 5049 states and 13330 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:40,439 INFO L93 Difference]: Finished difference Result 5726 states and 14631 transitions. [2021-08-21 18:53:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:40,447 INFO L225 Difference]: With dead ends: 5726 [2021-08-21 18:53:40,447 INFO L226 Difference]: Without dead ends: 5719 [2021-08-21 18:53:40,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5719 states. [2021-08-21 18:53:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5719 to 5066. [2021-08-21 18:53:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 5065 states have (on average 2.6454096742349456) internal successors, (13399), 5065 states have internal predecessors, (13399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 13399 transitions. [2021-08-21 18:53:40,505 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 13399 transitions. Word has length 29 [2021-08-21 18:53:40,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:40,505 INFO L470 AbstractCegarLoop]: Abstraction has 5066 states and 13399 transitions. [2021-08-21 18:53:40,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:40,505 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 13399 transitions. [2021-08-21 18:53:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:40,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:40,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:40,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 18:53:40,711 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,SelfDestructingSolverStorable125 [2021-08-21 18:53:40,711 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash -913113979, now seen corresponding path program 5 times [2021-08-21 18:53:40,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:40,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738292166] [2021-08-21 18:53:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:40,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:40,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:40,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738292166] [2021-08-21 18:53:40,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738292166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:40,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198000908] [2021-08-21 18:53:40,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:40,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:40,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:40,764 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 18:53:40,764 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 18:53:42,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:42,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:42,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:42,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:42,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198000908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:42,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:42,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:42,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217785099] [2021-08-21 18:53:42,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:42,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:42,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:42,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:42,313 INFO L87 Difference]: Start difference. First operand 5066 states and 13399 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:42,379 INFO L93 Difference]: Finished difference Result 5666 states and 14585 transitions. [2021-08-21 18:53:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:42,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:42,388 INFO L225 Difference]: With dead ends: 5666 [2021-08-21 18:53:42,388 INFO L226 Difference]: Without dead ends: 5659 [2021-08-21 18:53:42,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:53:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5659 states. [2021-08-21 18:53:42,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5659 to 5103. [2021-08-21 18:53:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5103 states, 5102 states have (on average 2.649549196393571) internal successors, (13518), 5102 states have internal predecessors, (13518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5103 states to 5103 states and 13518 transitions. [2021-08-21 18:53:42,453 INFO L78 Accepts]: Start accepts. Automaton has 5103 states and 13518 transitions. Word has length 29 [2021-08-21 18:53:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:42,454 INFO L470 AbstractCegarLoop]: Abstraction has 5103 states and 13518 transitions. [2021-08-21 18:53:42,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5103 states and 13518 transitions. [2021-08-21 18:53:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:42,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:42,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:42,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 18:53:42,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:42,664 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:42,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1449341055, now seen corresponding path program 6 times [2021-08-21 18:53:42,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:42,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431398215] [2021-08-21 18:53:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:42,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:42,708 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 18:53:42,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:42,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431398215] [2021-08-21 18:53:42,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431398215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:42,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247536706] [2021-08-21 18:53:42,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:42,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:42,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:42,710 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 18:53:42,710 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 18:53:44,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:53:44,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:44,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:44,253 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 18:53:44,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247536706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:44,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:44,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:44,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22660602] [2021-08-21 18:53:44,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:44,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:44,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:44,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:44,254 INFO L87 Difference]: Start difference. First operand 5103 states and 13518 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:44,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:44,322 INFO L93 Difference]: Finished difference Result 5675 states and 14624 transitions. [2021-08-21 18:53:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:44,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:44,331 INFO L225 Difference]: With dead ends: 5675 [2021-08-21 18:53:44,331 INFO L226 Difference]: Without dead ends: 5668 [2021-08-21 18:53:44,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2021-08-21 18:53:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5124. [2021-08-21 18:53:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5123 states have (on average 2.6527425336716766) internal successors, (13590), 5123 states have internal predecessors, (13590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 13590 transitions. [2021-08-21 18:53:44,394 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 13590 transitions. Word has length 29 [2021-08-21 18:53:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:44,394 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 13590 transitions. [2021-08-21 18:53:44,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 13590 transitions. [2021-08-21 18:53:44,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:44,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:44,401 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] [2021-08-21 18:53:44,422 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 18:53:44,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:44,605 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:44,605 INFO L82 PathProgramCache]: Analyzing trace with hash 262747765, now seen corresponding path program 3 times [2021-08-21 18:53:44,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:44,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381931657] [2021-08-21 18:53:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:44,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:44,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:44,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381931657] [2021-08-21 18:53:44,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381931657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:44,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619641630] [2021-08-21 18:53:44,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:44,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:44,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:44,668 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 18:53:44,669 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 18:53:46,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:46,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:46,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:46,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:46,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619641630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:46,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:46,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:46,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333283988] [2021-08-21 18:53:46,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:46,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:46,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:46,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:46,272 INFO L87 Difference]: Start difference. First operand 5124 states and 13590 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:46,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:46,330 INFO L93 Difference]: Finished difference Result 5755 states and 14812 transitions. [2021-08-21 18:53:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:46,330 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:46,339 INFO L225 Difference]: With dead ends: 5755 [2021-08-21 18:53:46,339 INFO L226 Difference]: Without dead ends: 5748 [2021-08-21 18:53:46,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:53:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5748 states. [2021-08-21 18:53:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5748 to 5152. [2021-08-21 18:53:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5152 states, 5151 states have (on average 2.654241894777713) internal successors, (13672), 5151 states have internal predecessors, (13672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5152 states to 5152 states and 13672 transitions. [2021-08-21 18:53:46,403 INFO L78 Accepts]: Start accepts. Automaton has 5152 states and 13672 transitions. Word has length 29 [2021-08-21 18:53:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:46,403 INFO L470 AbstractCegarLoop]: Abstraction has 5152 states and 13672 transitions. [2021-08-21 18:53:46,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5152 states and 13672 transitions. [2021-08-21 18:53:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:46,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:46,410 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] [2021-08-21 18:53:46,430 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 18:53:46,610 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,SelfDestructingSolverStorable128 [2021-08-21 18:53:46,610 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1976189385, now seen corresponding path program 4 times [2021-08-21 18:53:46,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:46,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612284190] [2021-08-21 18:53:46,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:46,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:46,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:46,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612284190] [2021-08-21 18:53:46,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612284190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:46,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393740064] [2021-08-21 18:53:46,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:53:46,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:46,655 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 18:53:46,655 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 18:53:48,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:53:48,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:48,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:48,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:48,229 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 18:53:48,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393740064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:48,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:48,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:48,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336004321] [2021-08-21 18:53:48,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:48,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:48,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:48,232 INFO L87 Difference]: Start difference. First operand 5152 states and 13672 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:48,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:48,290 INFO L93 Difference]: Finished difference Result 5838 states and 14967 transitions. [2021-08-21 18:53:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:48,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:48,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:48,297 INFO L225 Difference]: With dead ends: 5838 [2021-08-21 18:53:48,297 INFO L226 Difference]: Without dead ends: 5827 [2021-08-21 18:53:48,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5827 states. [2021-08-21 18:53:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5827 to 5178. [2021-08-21 18:53:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.6528877728414137) internal successors, (13734), 5177 states have internal predecessors, (13734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 13734 transitions. [2021-08-21 18:53:48,352 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 13734 transitions. Word has length 29 [2021-08-21 18:53:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:48,352 INFO L470 AbstractCegarLoop]: Abstraction has 5178 states and 13734 transitions. [2021-08-21 18:53:48,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 13734 transitions. [2021-08-21 18:53:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:48,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:48,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:48,379 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 18:53:48,559 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,SelfDestructingSolverStorable129 [2021-08-21 18:53:48,559 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:48,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:48,559 INFO L82 PathProgramCache]: Analyzing trace with hash 216813769, now seen corresponding path program 3 times [2021-08-21 18:53:48,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:48,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011632346] [2021-08-21 18:53:48,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:48,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:48,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:48,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011632346] [2021-08-21 18:53:48,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011632346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:48,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585495465] [2021-08-21 18:53:48,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:48,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:48,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:48,612 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 18:53:48,613 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 18:53:50,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:50,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:50,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:50,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585495465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:50,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:50,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:50,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673113416] [2021-08-21 18:53:50,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:50,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:50,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:50,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:50,361 INFO L87 Difference]: Start difference. First operand 5178 states and 13734 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:50,428 INFO L93 Difference]: Finished difference Result 5855 states and 15031 transitions. [2021-08-21 18:53:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:50,437 INFO L225 Difference]: With dead ends: 5855 [2021-08-21 18:53:50,437 INFO L226 Difference]: Without dead ends: 5848 [2021-08-21 18:53:50,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:53:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2021-08-21 18:53:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 5197. [2021-08-21 18:53:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 5196 states have (on average 2.6562740569668977) internal successors, (13802), 5196 states have internal predecessors, (13802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 13802 transitions. [2021-08-21 18:53:50,500 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 13802 transitions. Word has length 29 [2021-08-21 18:53:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:50,500 INFO L470 AbstractCegarLoop]: Abstraction has 5197 states and 13802 transitions. [2021-08-21 18:53:50,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 13802 transitions. [2021-08-21 18:53:50,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:50,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:50,507 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:50,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 18:53:50,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:50,707 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:50,707 INFO L82 PathProgramCache]: Analyzing trace with hash -513278459, now seen corresponding path program 5 times [2021-08-21 18:53:50,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:50,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014349283] [2021-08-21 18:53:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:50,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:50,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:50,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014349283] [2021-08-21 18:53:50,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014349283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:50,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409810301] [2021-08-21 18:53:50,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:53:50,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:50,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:50,754 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 18:53:50,754 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 18:53:52,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:53:52,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:52,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:52,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:52,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409810301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:52,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:52,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:52,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689674162] [2021-08-21 18:53:52,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:52,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:52,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:52,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:52,384 INFO L87 Difference]: Start difference. First operand 5197 states and 13802 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:52,446 INFO L93 Difference]: Finished difference Result 5798 states and 14974 transitions. [2021-08-21 18:53:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:52,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:52,455 INFO L225 Difference]: With dead ends: 5798 [2021-08-21 18:53:52,455 INFO L226 Difference]: Without dead ends: 5791 [2021-08-21 18:53:52,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:53:52,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5791 states. [2021-08-21 18:53:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5791 to 5224. [2021-08-21 18:53:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5224 states, 5223 states have (on average 2.65517901589125) internal successors, (13868), 5223 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5224 states to 5224 states and 13868 transitions. [2021-08-21 18:53:52,519 INFO L78 Accepts]: Start accepts. Automaton has 5224 states and 13868 transitions. Word has length 29 [2021-08-21 18:53:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:52,519 INFO L470 AbstractCegarLoop]: Abstraction has 5224 states and 13868 transitions. [2021-08-21 18:53:52,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5224 states and 13868 transitions. [2021-08-21 18:53:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:52,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:52,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:52,547 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 18:53:52,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:52,727 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:52,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1049505535, now seen corresponding path program 6 times [2021-08-21 18:53:52,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:52,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272244403] [2021-08-21 18:53:52,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:52,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:53:52,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:52,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272244403] [2021-08-21 18:53:52,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272244403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:52,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117389568] [2021-08-21 18:53:52,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:53:52,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:52,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:52,776 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 18:53:52,776 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 18:53:54,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:53:54,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:54,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:54,438 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 18:53:54,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117389568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:54,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:54,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:54,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547512680] [2021-08-21 18:53:54,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:54,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:54,439 INFO L87 Difference]: Start difference. First operand 5224 states and 13868 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:54,502 INFO L93 Difference]: Finished difference Result 5752 states and 14881 transitions. [2021-08-21 18:53:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:54,510 INFO L225 Difference]: With dead ends: 5752 [2021-08-21 18:53:54,510 INFO L226 Difference]: Without dead ends: 5745 [2021-08-21 18:53:54,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:53:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-08-21 18:53:54,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 5245. [2021-08-21 18:53:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5245 states, 5244 states have (on average 2.6559877955758964) internal successors, (13928), 5244 states have internal predecessors, (13928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5245 states to 5245 states and 13928 transitions. [2021-08-21 18:53:54,571 INFO L78 Accepts]: Start accepts. Automaton has 5245 states and 13928 transitions. Word has length 29 [2021-08-21 18:53:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:54,571 INFO L470 AbstractCegarLoop]: Abstraction has 5245 states and 13928 transitions. [2021-08-21 18:53:54,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5245 states and 13928 transitions. [2021-08-21 18:53:54,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:54,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:54,578 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] [2021-08-21 18:53:54,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 18:53:54,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:54,778 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:54,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1630834951, now seen corresponding path program 3 times [2021-08-21 18:53:54,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:54,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434940458] [2021-08-21 18:53:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:54,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:54,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:54,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434940458] [2021-08-21 18:53:54,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434940458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:54,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513945881] [2021-08-21 18:53:54,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:54,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:54,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:54,826 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 18:53:54,827 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 18:53:56,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:53:56,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:56,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:56,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:56,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513945881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:56,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:56,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:56,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626975738] [2021-08-21 18:53:56,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:56,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:56,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:56,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:56,534 INFO L87 Difference]: Start difference. First operand 5245 states and 13928 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:56,597 INFO L93 Difference]: Finished difference Result 5881 states and 15166 transitions. [2021-08-21 18:53:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:56,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:56,606 INFO L225 Difference]: With dead ends: 5881 [2021-08-21 18:53:56,606 INFO L226 Difference]: Without dead ends: 5874 [2021-08-21 18:53:56,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5874 states. [2021-08-21 18:53:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5874 to 5291. [2021-08-21 18:53:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5291 states, 5290 states have (on average 2.6565217391304348) internal successors, (14053), 5290 states have internal predecessors, (14053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5291 states to 5291 states and 14053 transitions. [2021-08-21 18:53:56,666 INFO L78 Accepts]: Start accepts. Automaton has 5291 states and 14053 transitions. Word has length 29 [2021-08-21 18:53:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:56,666 INFO L470 AbstractCegarLoop]: Abstraction has 5291 states and 14053 transitions. [2021-08-21 18:53:56,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5291 states and 14053 transitions. [2021-08-21 18:53:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:56,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:56,674 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:56,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 18:53:56,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 18:53:56,874 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:56,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:56,875 INFO L82 PathProgramCache]: Analyzing trace with hash 82606669, now seen corresponding path program 4 times [2021-08-21 18:53:56,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:56,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180438778] [2021-08-21 18:53:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:56,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:56,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:56,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180438778] [2021-08-21 18:53:56,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180438778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:56,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762006641] [2021-08-21 18:53:56,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:53:56,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:56,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:56,933 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 18:53:56,934 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 18:53:58,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:53:58,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:53:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:53:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:53:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:58,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762006641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:58,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:53:58,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:53:58,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563987967] [2021-08-21 18:53:58,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:53:58,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:53:58,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:53:58,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:58,646 INFO L87 Difference]: Start difference. First operand 5291 states and 14053 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:53:58,706 INFO L93 Difference]: Finished difference Result 5974 states and 15344 transitions. [2021-08-21 18:53:58,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:53:58,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:53:58,714 INFO L225 Difference]: With dead ends: 5974 [2021-08-21 18:53:58,714 INFO L226 Difference]: Without dead ends: 5963 [2021-08-21 18:53:58,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:53:58,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5963 states. [2021-08-21 18:53:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5963 to 5332. [2021-08-21 18:53:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5331 states have (on average 2.653348339898706) internal successors, (14145), 5331 states have internal predecessors, (14145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:53:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 14145 transitions. [2021-08-21 18:53:58,776 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 14145 transitions. Word has length 29 [2021-08-21 18:53:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:53:58,776 INFO L470 AbstractCegarLoop]: Abstraction has 5332 states and 14145 transitions. [2021-08-21 18:53:58,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:53:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 14145 transitions. [2021-08-21 18:53:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:53:58,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:53:58,783 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:53:58,803 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 18:53:58,983 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,SelfDestructingSolverStorable134 [2021-08-21 18:53:58,983 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:53:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:53:58,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1676768947, now seen corresponding path program 3 times [2021-08-21 18:53:58,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:53:58,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649477968] [2021-08-21 18:53:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:53:58,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:53:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:53:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:53:59,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:53:59,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649477968] [2021-08-21 18:53:59,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649477968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:53:59,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815944348] [2021-08-21 18:53:59,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:53:59,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:53:59,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:53:59,054 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 18:53:59,054 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 18:54:00,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:00,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:00,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:00,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815944348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:00,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:00,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:00,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973535308] [2021-08-21 18:54:00,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:00,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:00,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:00,764 INFO L87 Difference]: Start difference. First operand 5332 states and 14145 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:00,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:00,828 INFO L93 Difference]: Finished difference Result 6014 states and 15457 transitions. [2021-08-21 18:54:00,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:00,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:00,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:00,837 INFO L225 Difference]: With dead ends: 6014 [2021-08-21 18:54:00,837 INFO L226 Difference]: Without dead ends: 6007 [2021-08-21 18:54:00,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:54:00,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2021-08-21 18:54:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 5348. [2021-08-21 18:54:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5348 states, 5347 states have (on average 2.6551337198429024) internal successors, (14197), 5347 states have internal predecessors, (14197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 14197 transitions. [2021-08-21 18:54:00,896 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 14197 transitions. Word has length 29 [2021-08-21 18:54:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:00,896 INFO L470 AbstractCegarLoop]: Abstraction has 5348 states and 14197 transitions. [2021-08-21 18:54:00,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:00,896 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 14197 transitions. [2021-08-21 18:54:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:00,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:00,903 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] [2021-08-21 18:54:00,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 18:54:01,103 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,SelfDestructingSolverStorable135 [2021-08-21 18:54:01,103 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:01,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:01,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1252399871, now seen corresponding path program 5 times [2021-08-21 18:54:01,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:01,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398821726] [2021-08-21 18:54:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:01,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:01,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:01,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398821726] [2021-08-21 18:54:01,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398821726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:01,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806765562] [2021-08-21 18:54:01,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:01,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:01,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:01,149 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 18:54:01,149 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 18:54:02,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:02,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:02,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:02,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:02,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806765562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:02,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:02,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:02,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439887454] [2021-08-21 18:54:02,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:02,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:02,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:02,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:02,850 INFO L87 Difference]: Start difference. First operand 5348 states and 14197 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:02,908 INFO L93 Difference]: Finished difference Result 5957 states and 15364 transitions. [2021-08-21 18:54:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:02,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:02,917 INFO L225 Difference]: With dead ends: 5957 [2021-08-21 18:54:02,917 INFO L226 Difference]: Without dead ends: 5950 [2021-08-21 18:54:02,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5950 states. [2021-08-21 18:54:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5950 to 5384. [2021-08-21 18:54:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5384 states, 5383 states have (on average 2.651866988668029) internal successors, (14275), 5383 states have internal predecessors, (14275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5384 states to 5384 states and 14275 transitions. [2021-08-21 18:54:02,997 INFO L78 Accepts]: Start accepts. Automaton has 5384 states and 14275 transitions. Word has length 29 [2021-08-21 18:54:02,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:02,997 INFO L470 AbstractCegarLoop]: Abstraction has 5384 states and 14275 transitions. [2021-08-21 18:54:02,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 5384 states and 14275 transitions. [2021-08-21 18:54:03,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:03,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:03,003 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:03,024 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 18:54:03,208 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,SelfDestructingSolverStorable136 [2021-08-21 18:54:03,208 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1788626947, now seen corresponding path program 6 times [2021-08-21 18:54:03,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:03,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190719951] [2021-08-21 18:54:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:03,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:03,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:03,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190719951] [2021-08-21 18:54:03,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190719951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:03,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549643604] [2021-08-21 18:54:03,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:03,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:03,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:03,261 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 18:54:03,261 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 18:54:04,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:04,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:04,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:04,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:04,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549643604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:04,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:04,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:04,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630552592] [2021-08-21 18:54:04,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:04,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:04,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:04,983 INFO L87 Difference]: Start difference. First operand 5384 states and 14275 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:05,045 INFO L93 Difference]: Finished difference Result 5918 states and 15285 transitions. [2021-08-21 18:54:05,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:05,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:05,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:05,053 INFO L225 Difference]: With dead ends: 5918 [2021-08-21 18:54:05,053 INFO L226 Difference]: Without dead ends: 5911 [2021-08-21 18:54:05,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-08-21 18:54:05,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 5412. [2021-08-21 18:54:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5411 states have (on average 2.6510811310293847) internal successors, (14345), 5411 states have internal predecessors, (14345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 14345 transitions. [2021-08-21 18:54:05,116 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 14345 transitions. Word has length 29 [2021-08-21 18:54:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:05,116 INFO L470 AbstractCegarLoop]: Abstraction has 5412 states and 14345 transitions. [2021-08-21 18:54:05,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 14345 transitions. [2021-08-21 18:54:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:05,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:05,122 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] [2021-08-21 18:54:05,144 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 18:54:05,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:05,323 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1220742919, now seen corresponding path program 3 times [2021-08-21 18:54:05,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:05,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287836586] [2021-08-21 18:54:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:05,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:05,368 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 18:54:05,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:05,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287836586] [2021-08-21 18:54:05,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287836586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:05,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306802867] [2021-08-21 18:54:05,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:05,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:05,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:05,369 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 18:54:05,369 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 18:54:06,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:06,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:06,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:07,115 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 18:54:07,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306802867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:07,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:07,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:07,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853051943] [2021-08-21 18:54:07,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:07,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:07,116 INFO L87 Difference]: Start difference. First operand 5412 states and 14345 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:07,178 INFO L93 Difference]: Finished difference Result 6009 states and 15503 transitions. [2021-08-21 18:54:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:07,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:07,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:07,186 INFO L225 Difference]: With dead ends: 6009 [2021-08-21 18:54:07,186 INFO L226 Difference]: Without dead ends: 6002 [2021-08-21 18:54:07,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-08-21 18:54:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 5423. [2021-08-21 18:54:07,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5423 states, 5422 states have (on average 2.6530800442641094) internal successors, (14385), 5422 states have internal predecessors, (14385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:07,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5423 states to 5423 states and 14385 transitions. [2021-08-21 18:54:07,244 INFO L78 Accepts]: Start accepts. Automaton has 5423 states and 14385 transitions. Word has length 29 [2021-08-21 18:54:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:07,245 INFO L470 AbstractCegarLoop]: Abstraction has 5423 states and 14385 transitions. [2021-08-21 18:54:07,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 5423 states and 14385 transitions. [2021-08-21 18:54:07,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:07,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:07,251 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] [2021-08-21 18:54:07,272 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 18:54:07,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 18:54:07,451 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:07,452 INFO L82 PathProgramCache]: Analyzing trace with hash 976668049, now seen corresponding path program 5 times [2021-08-21 18:54:07,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:07,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932606403] [2021-08-21 18:54:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:07,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:07,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:07,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932606403] [2021-08-21 18:54:07,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932606403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:07,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220856272] [2021-08-21 18:54:07,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:07,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:07,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:07,501 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 18:54:07,501 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 18:54:09,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:09,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:09,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:09,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:09,283 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 18:54:09,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220856272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:09,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:09,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:09,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170588993] [2021-08-21 18:54:09,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:09,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:09,284 INFO L87 Difference]: Start difference. First operand 5423 states and 14385 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:09,362 INFO L93 Difference]: Finished difference Result 5960 states and 15433 transitions. [2021-08-21 18:54:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:09,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:09,371 INFO L225 Difference]: With dead ends: 5960 [2021-08-21 18:54:09,371 INFO L226 Difference]: Without dead ends: 5953 [2021-08-21 18:54:09,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5953 states. [2021-08-21 18:54:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5953 to 5432. [2021-08-21 18:54:09,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 2.6551279690664704) internal successors, (14420), 5431 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 14420 transitions. [2021-08-21 18:54:09,441 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 14420 transitions. Word has length 29 [2021-08-21 18:54:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:09,441 INFO L470 AbstractCegarLoop]: Abstraction has 5432 states and 14420 transitions. [2021-08-21 18:54:09,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 14420 transitions. [2021-08-21 18:54:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:09,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:09,449 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] [2021-08-21 18:54:09,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:09,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:09,649 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash -988121083, now seen corresponding path program 6 times [2021-08-21 18:54:09,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:09,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603336107] [2021-08-21 18:54:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:09,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:09,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:09,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603336107] [2021-08-21 18:54:09,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603336107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:09,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944733586] [2021-08-21 18:54:09,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:09,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:09,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:09,697 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 18:54:09,697 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 18:54:11,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:11,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:11,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:11,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944733586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:11,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:11,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:11,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847648365] [2021-08-21 18:54:11,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:11,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:11,490 INFO L87 Difference]: Start difference. First operand 5432 states and 14420 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:11,561 INFO L93 Difference]: Finished difference Result 5956 states and 15440 transitions. [2021-08-21 18:54:11,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:11,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:11,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:11,570 INFO L225 Difference]: With dead ends: 5956 [2021-08-21 18:54:11,570 INFO L226 Difference]: Without dead ends: 5949 [2021-08-21 18:54:11,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:54:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5949 states. [2021-08-21 18:54:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5949 to 5439. [2021-08-21 18:54:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5439 states, 5438 states have (on average 2.657410812798823) internal successors, (14451), 5438 states have internal predecessors, (14451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5439 states to 5439 states and 14451 transitions. [2021-08-21 18:54:11,644 INFO L78 Accepts]: Start accepts. Automaton has 5439 states and 14451 transitions. Word has length 29 [2021-08-21 18:54:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:11,645 INFO L470 AbstractCegarLoop]: Abstraction has 5439 states and 14451 transitions. [2021-08-21 18:54:11,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:11,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5439 states and 14451 transitions. [2021-08-21 18:54:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:11,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:11,651 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:11,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:11,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:11,852 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:11,852 INFO L82 PathProgramCache]: Analyzing trace with hash 565128845, now seen corresponding path program 5 times [2021-08-21 18:54:11,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:11,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075339994] [2021-08-21 18:54:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:11,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:11,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:11,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075339994] [2021-08-21 18:54:11,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075339994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:11,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838719378] [2021-08-21 18:54:11,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:11,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:11,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:11,898 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 18:54:11,899 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 18:54:13,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:13,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:13,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:13,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:13,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838719378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:13,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:13,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:13,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422330250] [2021-08-21 18:54:13,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:13,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:13,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:13,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:13,713 INFO L87 Difference]: Start difference. First operand 5439 states and 14451 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:13,781 INFO L93 Difference]: Finished difference Result 5986 states and 15520 transitions. [2021-08-21 18:54:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:13,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:13,789 INFO L225 Difference]: With dead ends: 5986 [2021-08-21 18:54:13,789 INFO L226 Difference]: Without dead ends: 5979 [2021-08-21 18:54:13,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:54:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5979 states. [2021-08-21 18:54:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5979 to 5448. [2021-08-21 18:54:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5448 states, 5447 states have (on average 2.659078391775289) internal successors, (14484), 5447 states have internal predecessors, (14484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5448 states to 5448 states and 14484 transitions. [2021-08-21 18:54:13,848 INFO L78 Accepts]: Start accepts. Automaton has 5448 states and 14484 transitions. Word has length 29 [2021-08-21 18:54:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:13,848 INFO L470 AbstractCegarLoop]: Abstraction has 5448 states and 14484 transitions. [2021-08-21 18:54:13,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 5448 states and 14484 transitions. [2021-08-21 18:54:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:13,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:13,855 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:13,876 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 18:54:14,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:14,055 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:14,056 INFO L82 PathProgramCache]: Analyzing trace with hash 28901769, now seen corresponding path program 6 times [2021-08-21 18:54:14,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:14,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125166959] [2021-08-21 18:54:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:14,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:14,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:14,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125166959] [2021-08-21 18:54:14,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125166959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:14,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21856742] [2021-08-21 18:54:14,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:14,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:14,102 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 18:54:14,102 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 18:54:15,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:15,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:15,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:15,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:15,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21856742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:15,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:15,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:15,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841456190] [2021-08-21 18:54:15,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:15,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:15,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:15,933 INFO L87 Difference]: Start difference. First operand 5448 states and 14484 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:16,011 INFO L93 Difference]: Finished difference Result 5980 states and 15519 transitions. [2021-08-21 18:54:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:16,021 INFO L225 Difference]: With dead ends: 5980 [2021-08-21 18:54:16,021 INFO L226 Difference]: Without dead ends: 5973 [2021-08-21 18:54:16,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5973 states. [2021-08-21 18:54:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5973 to 5455. [2021-08-21 18:54:16,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 2.660982764943161) internal successors, (14513), 5454 states have internal predecessors, (14513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 14513 transitions. [2021-08-21 18:54:16,094 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 14513 transitions. Word has length 29 [2021-08-21 18:54:16,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:16,094 INFO L470 AbstractCegarLoop]: Abstraction has 5455 states and 14513 transitions. [2021-08-21 18:54:16,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 14513 transitions. [2021-08-21 18:54:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:16,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:16,102 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:16,124 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 18:54:16,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-08-21 18:54:16,303 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:16,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1468387521, now seen corresponding path program 4 times [2021-08-21 18:54:16,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:16,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225867000] [2021-08-21 18:54:16,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:16,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:16,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:16,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225867000] [2021-08-21 18:54:16,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225867000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:16,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362320378] [2021-08-21 18:54:16,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:16,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:16,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:16,354 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 18:54:16,354 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 18:54:18,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:18,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:18,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:18,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362320378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:18,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:18,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:18,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162158] [2021-08-21 18:54:18,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:18,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:18,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:18,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:18,166 INFO L87 Difference]: Start difference. First operand 5455 states and 14513 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:18,229 INFO L93 Difference]: Finished difference Result 6110 states and 15740 transitions. [2021-08-21 18:54:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:18,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:18,237 INFO L225 Difference]: With dead ends: 6110 [2021-08-21 18:54:18,237 INFO L226 Difference]: Without dead ends: 6099 [2021-08-21 18:54:18,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6099 states. [2021-08-21 18:54:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6099 to 5462. [2021-08-21 18:54:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5462 states, 5461 states have (on average 2.6608679728987363) internal successors, (14531), 5461 states have internal predecessors, (14531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5462 states to 5462 states and 14531 transitions. [2021-08-21 18:54:18,306 INFO L78 Accepts]: Start accepts. Automaton has 5462 states and 14531 transitions. Word has length 29 [2021-08-21 18:54:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:18,306 INFO L470 AbstractCegarLoop]: Abstraction has 5462 states and 14531 transitions. [2021-08-21 18:54:18,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:18,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5462 states and 14531 transitions. [2021-08-21 18:54:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:18,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:18,339 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] [2021-08-21 18:54:18,360 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 18:54:18,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:18,540 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:18,540 INFO L82 PathProgramCache]: Analyzing trace with hash -290988095, now seen corresponding path program 4 times [2021-08-21 18:54:18,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:18,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626545497] [2021-08-21 18:54:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:18,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:18,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:18,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626545497] [2021-08-21 18:54:18,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626545497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:18,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777998746] [2021-08-21 18:54:18,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:18,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:18,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:18,587 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 18:54:18,588 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 18:54:20,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:20,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:20,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:20,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:20,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777998746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:20,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:20,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:20,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559681465] [2021-08-21 18:54:20,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:20,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:20,448 INFO L87 Difference]: Start difference. First operand 5462 states and 14531 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:20,518 INFO L93 Difference]: Finished difference Result 6090 states and 15722 transitions. [2021-08-21 18:54:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:20,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:20,527 INFO L225 Difference]: With dead ends: 6090 [2021-08-21 18:54:20,527 INFO L226 Difference]: Without dead ends: 6083 [2021-08-21 18:54:20,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:54:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6083 states. [2021-08-21 18:54:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6083 to 5470. [2021-08-21 18:54:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5470 states, 5469 states have (on average 2.663741086121777) internal successors, (14568), 5469 states have internal predecessors, (14568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5470 states to 5470 states and 14568 transitions. [2021-08-21 18:54:20,592 INFO L78 Accepts]: Start accepts. Automaton has 5470 states and 14568 transitions. Word has length 29 [2021-08-21 18:54:20,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:20,592 INFO L470 AbstractCegarLoop]: Abstraction has 5470 states and 14568 transitions. [2021-08-21 18:54:20,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:20,592 INFO L276 IsEmpty]: Start isEmpty. Operand 5470 states and 14568 transitions. [2021-08-21 18:54:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:20,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:20,599 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:20,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 18:54:20,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:20,799 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2014432765, now seen corresponding path program 5 times [2021-08-21 18:54:20,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:20,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389457846] [2021-08-21 18:54:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:20,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:20,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:20,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389457846] [2021-08-21 18:54:20,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389457846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:20,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195636201] [2021-08-21 18:54:20,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:20,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:20,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:20,847 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 18:54:20,847 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 18:54:22,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:22,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:22,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:22,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:22,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195636201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:22,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:22,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:22,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644730610] [2021-08-21 18:54:22,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:22,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:22,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:22,721 INFO L87 Difference]: Start difference. First operand 5470 states and 14568 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:22,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:22,802 INFO L93 Difference]: Finished difference Result 6023 states and 15643 transitions. [2021-08-21 18:54:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:22,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:22,812 INFO L225 Difference]: With dead ends: 6023 [2021-08-21 18:54:22,812 INFO L226 Difference]: Without dead ends: 6016 [2021-08-21 18:54:22,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:54:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2021-08-21 18:54:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 5479. [2021-08-21 18:54:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5479 states, 5478 states have (on average 2.6661190215407085) internal successors, (14605), 5478 states have internal predecessors, (14605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5479 states to 5479 states and 14605 transitions. [2021-08-21 18:54:22,889 INFO L78 Accepts]: Start accepts. Automaton has 5479 states and 14605 transitions. Word has length 29 [2021-08-21 18:54:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:22,890 INFO L470 AbstractCegarLoop]: Abstraction has 5479 states and 14605 transitions. [2021-08-21 18:54:22,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5479 states and 14605 transitions. [2021-08-21 18:54:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:22,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:22,897 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] [2021-08-21 18:54:22,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 18:54:23,097 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,SelfDestructingSolverStorable145 [2021-08-21 18:54:23,097 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:23,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:23,098 INFO L82 PathProgramCache]: Analyzing trace with hash 964964365, now seen corresponding path program 5 times [2021-08-21 18:54:23,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:23,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271195526] [2021-08-21 18:54:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:23,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:23,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:23,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271195526] [2021-08-21 18:54:23,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271195526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:23,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024975269] [2021-08-21 18:54:23,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:23,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:23,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:23,155 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 18:54:23,155 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 18:54:24,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:24,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:24,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:25,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024975269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:25,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:25,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:25,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958891330] [2021-08-21 18:54:25,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:25,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:25,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:25,045 INFO L87 Difference]: Start difference. First operand 5479 states and 14605 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:25,111 INFO L93 Difference]: Finished difference Result 6010 states and 15648 transitions. [2021-08-21 18:54:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:25,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:25,122 INFO L225 Difference]: With dead ends: 6010 [2021-08-21 18:54:25,122 INFO L226 Difference]: Without dead ends: 6003 [2021-08-21 18:54:25,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:54:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2021-08-21 18:54:25,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 5488. [2021-08-21 18:54:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 5487 states have (on average 2.6666666666666665) internal successors, (14632), 5487 states have internal predecessors, (14632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 14632 transitions. [2021-08-21 18:54:25,199 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 14632 transitions. Word has length 29 [2021-08-21 18:54:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:25,200 INFO L470 AbstractCegarLoop]: Abstraction has 5488 states and 14632 transitions. [2021-08-21 18:54:25,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 14632 transitions. [2021-08-21 18:54:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:25,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:25,208 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] [2021-08-21 18:54:25,230 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 18:54:25,408 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,SelfDestructingSolverStorable146 [2021-08-21 18:54:25,409 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:25,409 INFO L82 PathProgramCache]: Analyzing trace with hash 428737289, now seen corresponding path program 6 times [2021-08-21 18:54:25,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:25,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518339245] [2021-08-21 18:54:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:25,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:25,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:25,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518339245] [2021-08-21 18:54:25,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518339245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:25,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338312787] [2021-08-21 18:54:25,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:25,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:25,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:25,462 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 18:54:25,462 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 18:54:27,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:27,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338312787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:27,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:27,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:27,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635851419] [2021-08-21 18:54:27,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:27,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:27,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:27,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:27,349 INFO L87 Difference]: Start difference. First operand 5488 states and 14632 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:27,431 INFO L93 Difference]: Finished difference Result 5966 states and 15563 transitions. [2021-08-21 18:54:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:27,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:27,440 INFO L225 Difference]: With dead ends: 5966 [2021-08-21 18:54:27,440 INFO L226 Difference]: Without dead ends: 5959 [2021-08-21 18:54:27,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:54:27,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5959 states. [2021-08-21 18:54:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5959 to 5495. [2021-08-21 18:54:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5495 states, 5494 states have (on average 2.6678194393884236) internal successors, (14657), 5494 states have internal predecessors, (14657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5495 states to 5495 states and 14657 transitions. [2021-08-21 18:54:27,501 INFO L78 Accepts]: Start accepts. Automaton has 5495 states and 14657 transitions. Word has length 29 [2021-08-21 18:54:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:27,502 INFO L470 AbstractCegarLoop]: Abstraction has 5495 states and 14657 transitions. [2021-08-21 18:54:27,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 5495 states and 14657 transitions. [2021-08-21 18:54:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:27,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:27,509 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:27,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:27,709 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,SelfDestructingSolverStorable147 [2021-08-21 18:54:27,709 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:27,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2005143935, now seen corresponding path program 6 times [2021-08-21 18:54:27,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:27,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891031399] [2021-08-21 18:54:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:27,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:27,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:27,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891031399] [2021-08-21 18:54:27,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891031399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:27,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105766364] [2021-08-21 18:54:27,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:27,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:27,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:27,773 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 18:54:27,774 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 18:54:29,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:29,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:29,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:29,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105766364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:29,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:29,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:29,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314337246] [2021-08-21 18:54:29,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:29,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:29,699 INFO L87 Difference]: Start difference. First operand 5495 states and 14657 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:29,774 INFO L93 Difference]: Finished difference Result 6030 states and 15686 transitions. [2021-08-21 18:54:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:29,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:29,782 INFO L225 Difference]: With dead ends: 6030 [2021-08-21 18:54:29,783 INFO L226 Difference]: Without dead ends: 6023 [2021-08-21 18:54:29,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6023 states. [2021-08-21 18:54:29,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6023 to 5502. [2021-08-21 18:54:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5502 states, 5501 states have (on average 2.670423559352845) internal successors, (14690), 5501 states have internal predecessors, (14690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5502 states to 5502 states and 14690 transitions. [2021-08-21 18:54:29,845 INFO L78 Accepts]: Start accepts. Automaton has 5502 states and 14690 transitions. Word has length 29 [2021-08-21 18:54:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:29,845 INFO L470 AbstractCegarLoop]: Abstraction has 5502 states and 14690 transitions. [2021-08-21 18:54:29,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 5502 states and 14690 transitions. [2021-08-21 18:54:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:29,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:29,852 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:29,874 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 18:54:30,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:30,057 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1323459961, now seen corresponding path program 1 times [2021-08-21 18:54:30,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:30,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825979136] [2021-08-21 18:54:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:30,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:54:30,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:30,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825979136] [2021-08-21 18:54:30,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825979136] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:54:30,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:54:30,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:54:30,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179191264] [2021-08-21 18:54:30,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:30,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:30,109 INFO L87 Difference]: Start difference. First operand 5502 states and 14690 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:30,173 INFO L93 Difference]: Finished difference Result 6268 states and 16152 transitions. [2021-08-21 18:54:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:30,183 INFO L225 Difference]: With dead ends: 6268 [2021-08-21 18:54:30,183 INFO L226 Difference]: Without dead ends: 6257 [2021-08-21 18:54:30,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:30,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6257 states. [2021-08-21 18:54:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6257 to 5533. [2021-08-21 18:54:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5533 states, 5532 states have (on average 2.668112798264642) internal successors, (14760), 5532 states have internal predecessors, (14760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5533 states to 5533 states and 14760 transitions. [2021-08-21 18:54:30,255 INFO L78 Accepts]: Start accepts. Automaton has 5533 states and 14760 transitions. Word has length 29 [2021-08-21 18:54:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:30,255 INFO L470 AbstractCegarLoop]: Abstraction has 5533 states and 14760 transitions. [2021-08-21 18:54:30,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 5533 states and 14760 transitions. [2021-08-21 18:54:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:30,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:30,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:30,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-08-21 18:54:30,262 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:30,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1276100601, now seen corresponding path program 4 times [2021-08-21 18:54:30,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:30,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183649412] [2021-08-21 18:54:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:30,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:30,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:30,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183649412] [2021-08-21 18:54:30,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183649412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:30,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929488925] [2021-08-21 18:54:30,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:30,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:30,308 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 18:54:30,309 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 18:54:32,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:32,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:32,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:32,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929488925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:32,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:32,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:32,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040250915] [2021-08-21 18:54:32,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:32,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:32,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:32,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:32,244 INFO L87 Difference]: Start difference. First operand 5533 states and 14760 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:32,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:32,312 INFO L93 Difference]: Finished difference Result 6193 states and 16045 transitions. [2021-08-21 18:54:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:32,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:32,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:32,323 INFO L225 Difference]: With dead ends: 6193 [2021-08-21 18:54:32,323 INFO L226 Difference]: Without dead ends: 6186 [2021-08-21 18:54:32,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-08-21 18:54:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 5553. [2021-08-21 18:54:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5553 states, 5552 states have (on average 2.6718299711815563) internal successors, (14834), 5552 states have internal predecessors, (14834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5553 states to 5553 states and 14834 transitions. [2021-08-21 18:54:32,393 INFO L78 Accepts]: Start accepts. Automaton has 5553 states and 14834 transitions. Word has length 29 [2021-08-21 18:54:32,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:32,393 INFO L470 AbstractCegarLoop]: Abstraction has 5553 states and 14834 transitions. [2021-08-21 18:54:32,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:32,393 INFO L276 IsEmpty]: Start isEmpty. Operand 5553 states and 14834 transitions. [2021-08-21 18:54:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:32,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:32,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:32,422 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 18:54:32,600 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,SelfDestructingSolverStorable150 [2021-08-21 18:54:32,601 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:32,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1053030667, now seen corresponding path program 4 times [2021-08-21 18:54:32,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:32,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446110832] [2021-08-21 18:54:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:32,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:32,646 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 18:54:32,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:32,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446110832] [2021-08-21 18:54:32,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446110832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:32,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8704547] [2021-08-21 18:54:32,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:32,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:32,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:32,647 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 18:54:32,648 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 18:54:34,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:34,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:34,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:34,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:34,585 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 18:54:34,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8704547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:34,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:34,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:34,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767907727] [2021-08-21 18:54:34,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:34,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:34,586 INFO L87 Difference]: Start difference. First operand 5553 states and 14834 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:34,652 INFO L93 Difference]: Finished difference Result 6222 states and 16140 transitions. [2021-08-21 18:54:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:34,661 INFO L225 Difference]: With dead ends: 6222 [2021-08-21 18:54:34,662 INFO L226 Difference]: Without dead ends: 6215 [2021-08-21 18:54:34,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6215 states. [2021-08-21 18:54:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6215 to 5571. [2021-08-21 18:54:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5571 states, 5570 states have (on average 2.6741472172351886) internal successors, (14895), 5570 states have internal predecessors, (14895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5571 states to 5571 states and 14895 transitions. [2021-08-21 18:54:34,726 INFO L78 Accepts]: Start accepts. Automaton has 5571 states and 14895 transitions. Word has length 29 [2021-08-21 18:54:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:34,727 INFO L470 AbstractCegarLoop]: Abstraction has 5571 states and 14895 transitions. [2021-08-21 18:54:34,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 5571 states and 14895 transitions. [2021-08-21 18:54:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:34,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:34,734 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] [2021-08-21 18:54:34,755 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 18:54:34,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:34,934 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:34,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:34,934 INFO L82 PathProgramCache]: Analyzing trace with hash 912805361, now seen corresponding path program 3 times [2021-08-21 18:54:34,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:34,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4309921] [2021-08-21 18:54:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:34,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:34,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:34,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4309921] [2021-08-21 18:54:34,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4309921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:34,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331373672] [2021-08-21 18:54:34,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:34,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:34,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:34,981 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 18:54:34,981 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 18:54:36,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:36,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:36,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:36,937 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 18:54:36,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331373672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:36,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:36,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:36,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394403467] [2021-08-21 18:54:36,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:36,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:36,938 INFO L87 Difference]: Start difference. First operand 5571 states and 14895 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:37,000 INFO L93 Difference]: Finished difference Result 6187 states and 16100 transitions. [2021-08-21 18:54:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:37,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:37,010 INFO L225 Difference]: With dead ends: 6187 [2021-08-21 18:54:37,010 INFO L226 Difference]: Without dead ends: 6180 [2021-08-21 18:54:37,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:37,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6180 states. [2021-08-21 18:54:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6180 to 5589. [2021-08-21 18:54:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5589 states, 5588 states have (on average 2.6757337151037937) internal successors, (14952), 5588 states have internal predecessors, (14952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5589 states to 5589 states and 14952 transitions. [2021-08-21 18:54:37,075 INFO L78 Accepts]: Start accepts. Automaton has 5589 states and 14952 transitions. Word has length 29 [2021-08-21 18:54:37,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:37,075 INFO L470 AbstractCegarLoop]: Abstraction has 5589 states and 14952 transitions. [2021-08-21 18:54:37,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:37,075 INFO L276 IsEmpty]: Start isEmpty. Operand 5589 states and 14952 transitions. [2021-08-21 18:54:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:37,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:37,082 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:37,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 18:54:37,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:37,283 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:37,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1416325907, now seen corresponding path program 2 times [2021-08-21 18:54:37,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:37,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754845126] [2021-08-21 18:54:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:37,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:37,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:37,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754845126] [2021-08-21 18:54:37,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754845126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:37,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704841374] [2021-08-21 18:54:37,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:54:37,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:37,331 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 18:54:37,331 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 18:54:39,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:39,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:39,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704841374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:39,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:39,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:39,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792293554] [2021-08-21 18:54:39,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:39,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:39,334 INFO L87 Difference]: Start difference. First operand 5589 states and 14952 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:39,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:39,398 INFO L93 Difference]: Finished difference Result 6237 states and 16206 transitions. [2021-08-21 18:54:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:39,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:39,408 INFO L225 Difference]: With dead ends: 6237 [2021-08-21 18:54:39,408 INFO L226 Difference]: Without dead ends: 6230 [2021-08-21 18:54:39,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:54:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6230 states. [2021-08-21 18:54:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6230 to 5606. [2021-08-21 18:54:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5606 states, 5605 states have (on average 2.6761819803746656) internal successors, (15000), 5605 states have internal predecessors, (15000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5606 states to 5606 states and 15000 transitions. [2021-08-21 18:54:39,473 INFO L78 Accepts]: Start accepts. Automaton has 5606 states and 15000 transitions. Word has length 29 [2021-08-21 18:54:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:39,473 INFO L470 AbstractCegarLoop]: Abstraction has 5606 states and 15000 transitions. [2021-08-21 18:54:39,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5606 states and 15000 transitions. [2021-08-21 18:54:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:39,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:39,480 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] [2021-08-21 18:54:39,502 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 18:54:39,680 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,SelfDestructingSolverStorable153 [2021-08-21 18:54:39,680 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:39,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2072452045, now seen corresponding path program 3 times [2021-08-21 18:54:39,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:39,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17132613] [2021-08-21 18:54:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:39,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:39,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:39,733 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 18:54:39,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:39,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17132613] [2021-08-21 18:54:39,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17132613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:39,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038297075] [2021-08-21 18:54:39,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:39,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:39,734 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 18:54:39,735 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 18:54:41,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:54:41,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:41,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:41,711 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 18:54:41,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038297075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:41,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:41,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:41,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702811176] [2021-08-21 18:54:41,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:41,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:41,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:41,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:41,712 INFO L87 Difference]: Start difference. First operand 5606 states and 15000 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:41,768 INFO L93 Difference]: Finished difference Result 6270 states and 16216 transitions. [2021-08-21 18:54:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:41,778 INFO L225 Difference]: With dead ends: 6270 [2021-08-21 18:54:41,778 INFO L226 Difference]: Without dead ends: 6235 [2021-08-21 18:54:41,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:54:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6235 states. [2021-08-21 18:54:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6235 to 5661. [2021-08-21 18:54:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5661 states, 5660 states have (on average 2.6671378091872793) internal successors, (15096), 5660 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:41,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5661 states to 5661 states and 15096 transitions. [2021-08-21 18:54:41,842 INFO L78 Accepts]: Start accepts. Automaton has 5661 states and 15096 transitions. Word has length 29 [2021-08-21 18:54:41,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:41,842 INFO L470 AbstractCegarLoop]: Abstraction has 5661 states and 15096 transitions. [2021-08-21 18:54:41,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 5661 states and 15096 transitions. [2021-08-21 18:54:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:41,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:41,849 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] [2021-08-21 18:54:41,871 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 18:54:42,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:42,050 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:42,050 INFO L82 PathProgramCache]: Analyzing trace with hash 313076429, now seen corresponding path program 3 times [2021-08-21 18:54:42,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:42,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190045946] [2021-08-21 18:54:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:42,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:42,122 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 18:54:42,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:42,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190045946] [2021-08-21 18:54:42,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190045946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:42,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028417583] [2021-08-21 18:54:42,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:54:42,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:42,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:42,123 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 18:54:42,124 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 18:54:43,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:54:43,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:43,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:43,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:44,093 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 18:54:44,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028417583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:44,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:44,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:44,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071300489] [2021-08-21 18:54:44,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:44,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:44,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:44,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:44,094 INFO L87 Difference]: Start difference. First operand 5661 states and 15096 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:44,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:44,157 INFO L93 Difference]: Finished difference Result 6299 states and 16292 transitions. [2021-08-21 18:54:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:44,166 INFO L225 Difference]: With dead ends: 6299 [2021-08-21 18:54:44,166 INFO L226 Difference]: Without dead ends: 6292 [2021-08-21 18:54:44,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6292 states. [2021-08-21 18:54:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6292 to 5675. [2021-08-21 18:54:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5675 states, 5674 states have (on average 2.6660204441311244) internal successors, (15127), 5674 states have internal predecessors, (15127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5675 states to 5675 states and 15127 transitions. [2021-08-21 18:54:44,231 INFO L78 Accepts]: Start accepts. Automaton has 5675 states and 15127 transitions. Word has length 29 [2021-08-21 18:54:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:44,231 INFO L470 AbstractCegarLoop]: Abstraction has 5675 states and 15127 transitions. [2021-08-21 18:54:44,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:44,231 INFO L276 IsEmpty]: Start isEmpty. Operand 5675 states and 15127 transitions. [2021-08-21 18:54:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:44,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:44,238 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] [2021-08-21 18:54:44,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 18:54:44,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 18:54:44,438 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:44,439 INFO L82 PathProgramCache]: Analyzing trace with hash -941853363, now seen corresponding path program 4 times [2021-08-21 18:54:44,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:44,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820027270] [2021-08-21 18:54:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:44,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:44,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:44,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820027270] [2021-08-21 18:54:44,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820027270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:44,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668247755] [2021-08-21 18:54:44,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:54:44,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:44,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:44,486 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 18:54:44,486 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 18:54:46,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:54:46,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:46,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:46,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:54:46,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668247755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:46,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:46,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:46,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644613179] [2021-08-21 18:54:46,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:46,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:46,570 INFO L87 Difference]: Start difference. First operand 5675 states and 15127 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:46,637 INFO L93 Difference]: Finished difference Result 6404 states and 16525 transitions. [2021-08-21 18:54:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:46,646 INFO L225 Difference]: With dead ends: 6404 [2021-08-21 18:54:46,646 INFO L226 Difference]: Without dead ends: 6393 [2021-08-21 18:54:46,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2021-08-21 18:54:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 5702. [2021-08-21 18:54:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5702 states, 5701 states have (on average 2.6676021750570076) internal successors, (15208), 5701 states have internal predecessors, (15208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5702 states to 5702 states and 15208 transitions. [2021-08-21 18:54:46,721 INFO L78 Accepts]: Start accepts. Automaton has 5702 states and 15208 transitions. Word has length 29 [2021-08-21 18:54:46,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:46,721 INFO L470 AbstractCegarLoop]: Abstraction has 5702 states and 15208 transitions. [2021-08-21 18:54:46,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:46,721 INFO L276 IsEmpty]: Start isEmpty. Operand 5702 states and 15208 transitions. [2021-08-21 18:54:46,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:46,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:46,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:46,752 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 18:54:46,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-21 18:54:46,930 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:46,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:46,931 INFO L82 PathProgramCache]: Analyzing trace with hash 976623305, now seen corresponding path program 5 times [2021-08-21 18:54:46,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:46,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264951818] [2021-08-21 18:54:46,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:46,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:46,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:46,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264951818] [2021-08-21 18:54:46,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264951818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:46,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869161204] [2021-08-21 18:54:46,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:46,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:46,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:46,979 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 18:54:46,979 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 18:54:48,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:48,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:48,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:48,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:49,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869161204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:49,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:49,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:49,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276053320] [2021-08-21 18:54:49,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:49,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:49,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:49,009 INFO L87 Difference]: Start difference. First operand 5702 states and 15208 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:49,080 INFO L93 Difference]: Finished difference Result 6338 states and 16501 transitions. [2021-08-21 18:54:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:49,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:49,090 INFO L225 Difference]: With dead ends: 6338 [2021-08-21 18:54:49,090 INFO L226 Difference]: Without dead ends: 6331 [2021-08-21 18:54:49,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:54:49,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6331 states. [2021-08-21 18:54:49,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6331 to 5738. [2021-08-21 18:54:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5738 states, 5737 states have (on average 2.6717796757887395) internal successors, (15328), 5737 states have internal predecessors, (15328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5738 states to 5738 states and 15328 transitions. [2021-08-21 18:54:49,163 INFO L78 Accepts]: Start accepts. Automaton has 5738 states and 15328 transitions. Word has length 29 [2021-08-21 18:54:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:49,163 INFO L470 AbstractCegarLoop]: Abstraction has 5738 states and 15328 transitions. [2021-08-21 18:54:49,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5738 states and 15328 transitions. [2021-08-21 18:54:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:49,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:49,170 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:49,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 18:54:49,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 18:54:49,371 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:49,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1352507963, now seen corresponding path program 5 times [2021-08-21 18:54:49,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:49,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254200761] [2021-08-21 18:54:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:49,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:49,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:49,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254200761] [2021-08-21 18:54:49,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254200761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:49,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388238828] [2021-08-21 18:54:49,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:49,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:49,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:49,420 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 18:54:49,420 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 18:54:51,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:51,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:51,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388238828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:51,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:51,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:51,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692895116] [2021-08-21 18:54:51,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:51,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:51,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:51,516 INFO L87 Difference]: Start difference. First operand 5738 states and 15328 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:51,601 INFO L93 Difference]: Finished difference Result 6315 states and 16476 transitions. [2021-08-21 18:54:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:51,610 INFO L225 Difference]: With dead ends: 6315 [2021-08-21 18:54:51,610 INFO L226 Difference]: Without dead ends: 6308 [2021-08-21 18:54:51,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:54:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6308 states. [2021-08-21 18:54:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6308 to 5756. [2021-08-21 18:54:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5756 states, 5755 states have (on average 2.6747176368375327) internal successors, (15393), 5755 states have internal predecessors, (15393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 15393 transitions. [2021-08-21 18:54:51,686 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 15393 transitions. Word has length 29 [2021-08-21 18:54:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:51,686 INFO L470 AbstractCegarLoop]: Abstraction has 5756 states and 15393 transitions. [2021-08-21 18:54:51,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 15393 transitions. [2021-08-21 18:54:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:51,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:51,695 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] [2021-08-21 18:54:51,717 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 18:54:51,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 18:54:51,895 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash 613328065, now seen corresponding path program 5 times [2021-08-21 18:54:51,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:51,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146316107] [2021-08-21 18:54:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:51,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:51,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:51,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146316107] [2021-08-21 18:54:51,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146316107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:51,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572680695] [2021-08-21 18:54:51,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:54:51,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:51,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:51,943 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 18:54:51,943 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 18:54:53,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:54:53,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:53,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:54,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572680695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:54,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:54,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:54,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930819608] [2021-08-21 18:54:54,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:54,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:54,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:54,030 INFO L87 Difference]: Start difference. First operand 5756 states and 15393 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:54,100 INFO L93 Difference]: Finished difference Result 6370 states and 16624 transitions. [2021-08-21 18:54:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:54,110 INFO L225 Difference]: With dead ends: 6370 [2021-08-21 18:54:54,110 INFO L226 Difference]: Without dead ends: 6363 [2021-08-21 18:54:54,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6363 states. [2021-08-21 18:54:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6363 to 5783. [2021-08-21 18:54:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 2.6762365963334487) internal successors, (15474), 5782 states have internal predecessors, (15474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 15474 transitions. [2021-08-21 18:54:54,175 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 15474 transitions. Word has length 29 [2021-08-21 18:54:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:54,175 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 15474 transitions. [2021-08-21 18:54:54,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 15474 transitions. [2021-08-21 18:54:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:54,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:54,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:54,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 18:54:54,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-21 18:54:54,384 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:54,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:54,384 INFO L82 PathProgramCache]: Analyzing trace with hash 543683661, now seen corresponding path program 6 times [2021-08-21 18:54:54,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:54,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843171377] [2021-08-21 18:54:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:54,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:54,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:54,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843171377] [2021-08-21 18:54:54,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843171377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:54,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917197952] [2021-08-21 18:54:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:54,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:54,434 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 18:54:54,434 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 18:54:56,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:56,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:56,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:56,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:56,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917197952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:56,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:56,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:56,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491719372] [2021-08-21 18:54:56,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:56,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:56,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:56,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:56,523 INFO L87 Difference]: Start difference. First operand 5783 states and 15474 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:56,609 INFO L93 Difference]: Finished difference Result 6380 states and 16658 transitions. [2021-08-21 18:54:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:56,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:56,621 INFO L225 Difference]: With dead ends: 6380 [2021-08-21 18:54:56,621 INFO L226 Difference]: Without dead ends: 6373 [2021-08-21 18:54:56,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:56,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6373 states. [2021-08-21 18:54:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6373 to 5811. [2021-08-21 18:54:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5811 states, 5810 states have (on average 2.680895008605852) internal successors, (15576), 5810 states have internal predecessors, (15576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5811 states to 5811 states and 15576 transitions. [2021-08-21 18:54:56,688 INFO L78 Accepts]: Start accepts. Automaton has 5811 states and 15576 transitions. Word has length 29 [2021-08-21 18:54:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:56,688 INFO L470 AbstractCegarLoop]: Abstraction has 5811 states and 15576 transitions. [2021-08-21 18:54:56,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 5811 states and 15576 transitions. [2021-08-21 18:54:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:56,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:56,696 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:54:56,718 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 18:54:56,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-08-21 18:54:56,896 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1355058385, now seen corresponding path program 6 times [2021-08-21 18:54:56,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:56,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438373903] [2021-08-21 18:54:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:56,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:56,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:56,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438373903] [2021-08-21 18:54:56,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438373903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:56,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19519] [2021-08-21 18:54:56,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:56,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:56,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:56,945 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 18:54:56,946 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 18:54:58,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:54:58,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:54:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:54:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:54:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:59,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:59,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:54:59,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:54:59,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076648449] [2021-08-21 18:54:59,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:54:59,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:54:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:54:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:54:59,049 INFO L87 Difference]: Start difference. First operand 5811 states and 15576 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:54:59,120 INFO L93 Difference]: Finished difference Result 6368 states and 16661 transitions. [2021-08-21 18:54:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:54:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:54:59,129 INFO L225 Difference]: With dead ends: 6368 [2021-08-21 18:54:59,129 INFO L226 Difference]: Without dead ends: 6361 [2021-08-21 18:54:59,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:54:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-08-21 18:54:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5825. [2021-08-21 18:54:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5825 states, 5824 states have (on average 2.6842376373626373) internal successors, (15633), 5824 states have internal predecessors, (15633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:54:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5825 states to 5825 states and 15633 transitions. [2021-08-21 18:54:59,191 INFO L78 Accepts]: Start accepts. Automaton has 5825 states and 15633 transitions. Word has length 29 [2021-08-21 18:54:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:54:59,192 INFO L470 AbstractCegarLoop]: Abstraction has 5825 states and 15633 transitions. [2021-08-21 18:54:59,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:54:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 5825 states and 15633 transitions. [2021-08-21 18:54:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:54:59,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:54:59,199 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] [2021-08-21 18:54:59,221 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 18:54:59,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:59,399 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:54:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:54:59,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2128534187, now seen corresponding path program 6 times [2021-08-21 18:54:59,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:54:59,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308487430] [2021-08-21 18:54:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:54:59,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:54:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:54:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:54:59,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:54:59,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308487430] [2021-08-21 18:54:59,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308487430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:54:59,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19420262] [2021-08-21 18:54:59,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:54:59,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:54:59,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:54:59,447 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 18:54:59,448 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 18:55:01,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:01,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:01,587 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 18:55:01,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19420262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:01,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:01,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:01,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135777951] [2021-08-21 18:55:01,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:01,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:01,588 INFO L87 Difference]: Start difference. First operand 5825 states and 15633 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:01,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:01,660 INFO L93 Difference]: Finished difference Result 6409 states and 16779 transitions. [2021-08-21 18:55:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:01,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:01,672 INFO L225 Difference]: With dead ends: 6409 [2021-08-21 18:55:01,672 INFO L226 Difference]: Without dead ends: 6402 [2021-08-21 18:55:01,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:55:01,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6402 states. [2021-08-21 18:55:01,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6402 to 5846. [2021-08-21 18:55:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5846 states, 5845 states have (on average 2.6874251497005988) internal successors, (15708), 5845 states have internal predecessors, (15708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5846 states to 5846 states and 15708 transitions. [2021-08-21 18:55:01,746 INFO L78 Accepts]: Start accepts. Automaton has 5846 states and 15708 transitions. Word has length 29 [2021-08-21 18:55:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:01,747 INFO L470 AbstractCegarLoop]: Abstraction has 5846 states and 15708 transitions. [2021-08-21 18:55:01,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:01,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5846 states and 15708 transitions. [2021-08-21 18:55:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:01,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:01,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:01,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 18:55:01,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:01,954 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:01,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1400175825, now seen corresponding path program 4 times [2021-08-21 18:55:01,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:01,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166077015] [2021-08-21 18:55:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:01,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:02,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:02,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166077015] [2021-08-21 18:55:02,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166077015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:02,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690496398] [2021-08-21 18:55:02,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:02,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:02,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:02,050 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 18:55:02,051 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 18:55:04,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:04,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:04,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:04,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:04,152 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 18:55:04,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690496398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:04,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:04,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:04,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764657388] [2021-08-21 18:55:04,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:04,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:04,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:04,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:04,153 INFO L87 Difference]: Start difference. First operand 5846 states and 15708 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:04,222 INFO L93 Difference]: Finished difference Result 6599 states and 17160 transitions. [2021-08-21 18:55:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:04,222 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:04,233 INFO L225 Difference]: With dead ends: 6599 [2021-08-21 18:55:04,233 INFO L226 Difference]: Without dead ends: 6588 [2021-08-21 18:55:04,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6588 states. [2021-08-21 18:55:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6588 to 5873. [2021-08-21 18:55:04,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5872 states have (on average 2.6878405994550407) internal successors, (15783), 5872 states have internal predecessors, (15783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 15783 transitions. [2021-08-21 18:55:04,327 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 15783 transitions. Word has length 29 [2021-08-21 18:55:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:04,327 INFO L470 AbstractCegarLoop]: Abstraction has 5873 states and 15783 transitions. [2021-08-21 18:55:04,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 15783 transitions. [2021-08-21 18:55:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:04,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:04,339 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] [2021-08-21 18:55:04,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:04,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:04,553 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash 989521225, now seen corresponding path program 5 times [2021-08-21 18:55:04,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:04,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30484518] [2021-08-21 18:55:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:04,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:04,602 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 18:55:04,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:04,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30484518] [2021-08-21 18:55:04,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30484518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:04,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983981367] [2021-08-21 18:55:04,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:04,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:04,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:04,603 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 18:55:04,603 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 18:55:06,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:06,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:06,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:06,757 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 18:55:06,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983981367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:06,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:06,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:06,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676434175] [2021-08-21 18:55:06,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:06,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:06,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:06,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:06,758 INFO L87 Difference]: Start difference. First operand 5873 states and 15783 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:06,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:06,846 INFO L93 Difference]: Finished difference Result 6468 states and 16971 transitions. [2021-08-21 18:55:06,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:06,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:06,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:06,857 INFO L225 Difference]: With dead ends: 6468 [2021-08-21 18:55:06,857 INFO L226 Difference]: Without dead ends: 6461 [2021-08-21 18:55:06,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:55:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6461 states. [2021-08-21 18:55:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6461 to 5891. [2021-08-21 18:55:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5891 states, 5890 states have (on average 2.6899830220713072) internal successors, (15844), 5890 states have internal predecessors, (15844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5891 states to 5891 states and 15844 transitions. [2021-08-21 18:55:06,968 INFO L78 Accepts]: Start accepts. Automaton has 5891 states and 15844 transitions. Word has length 29 [2021-08-21 18:55:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:06,968 INFO L470 AbstractCegarLoop]: Abstraction has 5891 states and 15844 transitions. [2021-08-21 18:55:06,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 5891 states and 15844 transitions. [2021-08-21 18:55:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:06,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:06,980 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:07,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:07,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:07,193 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:07,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1339610043, now seen corresponding path program 5 times [2021-08-21 18:55:07,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:07,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864293827] [2021-08-21 18:55:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:07,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:07,240 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 18:55:07,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:07,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864293827] [2021-08-21 18:55:07,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864293827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:07,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785733802] [2021-08-21 18:55:07,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:07,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:07,241 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 18:55:07,242 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 18:55:09,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:09,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:09,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:09,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:09,473 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 18:55:09,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785733802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:09,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:09,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:09,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606935585] [2021-08-21 18:55:09,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:09,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:09,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:09,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:09,474 INFO L87 Difference]: Start difference. First operand 5891 states and 15844 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:09,543 INFO L93 Difference]: Finished difference Result 6526 states and 17116 transitions. [2021-08-21 18:55:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:09,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:09,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:09,560 INFO L225 Difference]: With dead ends: 6526 [2021-08-21 18:55:09,560 INFO L226 Difference]: Without dead ends: 6519 [2021-08-21 18:55:09,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:55:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6519 states. [2021-08-21 18:55:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6519 to 5918. [2021-08-21 18:55:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5918 states, 5917 states have (on average 2.6903836403582897) internal successors, (15919), 5917 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5918 states to 5918 states and 15919 transitions. [2021-08-21 18:55:09,634 INFO L78 Accepts]: Start accepts. Automaton has 5918 states and 15919 transitions. Word has length 29 [2021-08-21 18:55:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:09,634 INFO L470 AbstractCegarLoop]: Abstraction has 5918 states and 15919 transitions. [2021-08-21 18:55:09,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:09,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5918 states and 15919 transitions. [2021-08-21 18:55:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:09,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:09,644 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] [2021-08-21 18:55:09,667 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 18:55:09,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:09,857 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash 556581581, now seen corresponding path program 6 times [2021-08-21 18:55:09,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:09,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272400183] [2021-08-21 18:55:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:09,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:09,905 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 18:55:09,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:09,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272400183] [2021-08-21 18:55:09,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272400183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:09,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769595627] [2021-08-21 18:55:09,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:09,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:09,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:09,906 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 18:55:09,908 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 18:55:11,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:11,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:11,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:12,079 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 18:55:12,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769595627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:12,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:12,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:12,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333617194] [2021-08-21 18:55:12,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:12,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:12,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:12,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:12,080 INFO L87 Difference]: Start difference. First operand 5918 states and 15919 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:12,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:12,151 INFO L93 Difference]: Finished difference Result 6487 states and 17026 transitions. [2021-08-21 18:55:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:12,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:12,162 INFO L225 Difference]: With dead ends: 6487 [2021-08-21 18:55:12,162 INFO L226 Difference]: Without dead ends: 6480 [2021-08-21 18:55:12,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:55:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-08-21 18:55:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5932. [2021-08-21 18:55:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5932 states, 5931 states have (on average 2.6929691451694486) internal successors, (15972), 5931 states have internal predecessors, (15972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5932 states to 5932 states and 15972 transitions. [2021-08-21 18:55:12,236 INFO L78 Accepts]: Start accepts. Automaton has 5932 states and 15972 transitions. Word has length 29 [2021-08-21 18:55:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:12,236 INFO L470 AbstractCegarLoop]: Abstraction has 5932 states and 15972 transitions. [2021-08-21 18:55:12,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5932 states and 15972 transitions. [2021-08-21 18:55:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:12,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:12,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:12,267 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 18:55:12,445 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,SelfDestructingSolverStorable166 [2021-08-21 18:55:12,445 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1367956305, now seen corresponding path program 6 times [2021-08-21 18:55:12,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:12,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959700769] [2021-08-21 18:55:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:12,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:12,509 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 18:55:12,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:12,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959700769] [2021-08-21 18:55:12,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959700769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:12,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075111435] [2021-08-21 18:55:12,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:12,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:12,510 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 18:55:12,511 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 18:55:14,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:14,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:14,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:14,705 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 18:55:14,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075111435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:14,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:14,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:14,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680455383] [2021-08-21 18:55:14,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:14,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:14,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:14,706 INFO L87 Difference]: Start difference. First operand 5932 states and 15972 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:14,777 INFO L93 Difference]: Finished difference Result 6528 states and 17137 transitions. [2021-08-21 18:55:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:14,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:14,787 INFO L225 Difference]: With dead ends: 6528 [2021-08-21 18:55:14,787 INFO L226 Difference]: Without dead ends: 6521 [2021-08-21 18:55:14,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:55:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6521 states. [2021-08-21 18:55:14,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6521 to 5953. [2021-08-21 18:55:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5952 states have (on average 2.6950604838709675) internal successors, (16041), 5952 states have internal predecessors, (16041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 16041 transitions. [2021-08-21 18:55:14,859 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 16041 transitions. Word has length 29 [2021-08-21 18:55:14,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:14,859 INFO L470 AbstractCegarLoop]: Abstraction has 5953 states and 16041 transitions. [2021-08-21 18:55:14,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:14,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 16041 transitions. [2021-08-21 18:55:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:14,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:14,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:14,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 18:55:15,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 18:55:15,067 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:15,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:15,067 INFO L82 PathProgramCache]: Analyzing trace with hash -552762283, now seen corresponding path program 4 times [2021-08-21 18:55:15,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:15,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926136177] [2021-08-21 18:55:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:15,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:15,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:15,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926136177] [2021-08-21 18:55:15,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926136177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:15,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230824895] [2021-08-21 18:55:15,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:55:15,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:15,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:15,120 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 18:55:15,120 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 18:55:17,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:55:17,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:17,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:17,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:17,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230824895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:17,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:17,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:17,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200791607] [2021-08-21 18:55:17,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:17,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:17,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:17,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:17,374 INFO L87 Difference]: Start difference. First operand 5953 states and 16041 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:17,438 INFO L93 Difference]: Finished difference Result 6649 states and 17372 transitions. [2021-08-21 18:55:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:17,448 INFO L225 Difference]: With dead ends: 6649 [2021-08-21 18:55:17,449 INFO L226 Difference]: Without dead ends: 6638 [2021-08-21 18:55:17,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:55:17,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6638 states. [2021-08-21 18:55:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6638 to 5971. [2021-08-21 18:55:17,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5971 states, 5970 states have (on average 2.695142378559464) internal successors, (16090), 5970 states have internal predecessors, (16090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:17,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5971 states to 5971 states and 16090 transitions. [2021-08-21 18:55:17,522 INFO L78 Accepts]: Start accepts. Automaton has 5971 states and 16090 transitions. Word has length 29 [2021-08-21 18:55:17,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:17,522 INFO L470 AbstractCegarLoop]: Abstraction has 5971 states and 16090 transitions. [2021-08-21 18:55:17,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 5971 states and 16090 transitions. [2021-08-21 18:55:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:17,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:17,531 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:17,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 18:55:17,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 18:55:17,731 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:17,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1002419145, now seen corresponding path program 5 times [2021-08-21 18:55:17,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:17,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068642455] [2021-08-21 18:55:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:17,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:17,779 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 18:55:17,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:17,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068642455] [2021-08-21 18:55:17,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068642455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:17,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802333199] [2021-08-21 18:55:17,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:55:17,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:17,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:17,786 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 18:55:17,786 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 18:55:19,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:19,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:19,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:55:19,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802333199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:19,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:19,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:19,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604708472] [2021-08-21 18:55:19,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:19,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:19,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:19,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:19,991 INFO L87 Difference]: Start difference. First operand 5971 states and 16090 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:20,060 INFO L93 Difference]: Finished difference Result 6552 states and 17233 transitions. [2021-08-21 18:55:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:20,071 INFO L225 Difference]: With dead ends: 6552 [2021-08-21 18:55:20,071 INFO L226 Difference]: Without dead ends: 6545 [2021-08-21 18:55:20,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 18:55:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6545 states. [2021-08-21 18:55:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6545 to 5989. [2021-08-21 18:55:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5989 states, 5988 states have (on average 2.6952237808951236) internal successors, (16139), 5988 states have internal predecessors, (16139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5989 states to 5989 states and 16139 transitions. [2021-08-21 18:55:20,141 INFO L78 Accepts]: Start accepts. Automaton has 5989 states and 16139 transitions. Word has length 29 [2021-08-21 18:55:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:20,141 INFO L470 AbstractCegarLoop]: Abstraction has 5989 states and 16139 transitions. [2021-08-21 18:55:20,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 5989 states and 16139 transitions. [2021-08-21 18:55:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:20,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:20,149 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:20,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:20,349 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,SelfDestructingSolverStorable169 [2021-08-21 18:55:20,350 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:20,350 INFO L82 PathProgramCache]: Analyzing trace with hash 569479501, now seen corresponding path program 6 times [2021-08-21 18:55:20,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:20,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083419706] [2021-08-21 18:55:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:20,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:20,403 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 18:55:20,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:20,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083419706] [2021-08-21 18:55:20,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083419706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:20,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009231104] [2021-08-21 18:55:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:55:20,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:20,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:20,405 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 18:55:20,406 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 18:55:22,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:55:22,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:22,678 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 18:55:22,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009231104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:22,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:22,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:22,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492763906] [2021-08-21 18:55:22,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:22,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:22,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:22,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:22,678 INFO L87 Difference]: Start difference. First operand 5989 states and 16139 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:22,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:22,744 INFO L93 Difference]: Finished difference Result 6506 states and 17138 transitions. [2021-08-21 18:55:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:22,754 INFO L225 Difference]: With dead ends: 6506 [2021-08-21 18:55:22,754 INFO L226 Difference]: Without dead ends: 6499 [2021-08-21 18:55:22,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 18:55:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6499 states. [2021-08-21 18:55:22,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6499 to 6003. [2021-08-21 18:55:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 6002 states have (on average 2.696434521826058) internal successors, (16184), 6002 states have internal predecessors, (16184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 16184 transitions. [2021-08-21 18:55:22,821 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 16184 transitions. Word has length 29 [2021-08-21 18:55:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:22,821 INFO L470 AbstractCegarLoop]: Abstraction has 6003 states and 16184 transitions. [2021-08-21 18:55:22,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 16184 transitions. [2021-08-21 18:55:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 18:55:22,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:22,829 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] [2021-08-21 18:55:22,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 18:55:23,029 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,SelfDestructingSolverStorable170 [2021-08-21 18:55:23,029 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1789266905, now seen corresponding path program 3 times [2021-08-21 18:55:23,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:23,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182957374] [2021-08-21 18:55:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:23,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:23,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:23,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182957374] [2021-08-21 18:55:23,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182957374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:23,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829369711] [2021-08-21 18:55:23,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:23,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:23,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:23,077 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 18:55:23,078 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 18:55:25,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:55:25,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 18:55:25,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:55:25,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829369711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:25,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:25,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 18:55:25,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008365310] [2021-08-21 18:55:25,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:55:25,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:55:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:25,353 INFO L87 Difference]: Start difference. First operand 6003 states and 16184 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:25,415 INFO L93 Difference]: Finished difference Result 6752 states and 17599 transitions. [2021-08-21 18:55:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:55:25,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:25,425 INFO L225 Difference]: With dead ends: 6752 [2021-08-21 18:55:25,425 INFO L226 Difference]: Without dead ends: 6741 [2021-08-21 18:55:25,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:55:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6741 states. [2021-08-21 18:55:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6741 to 6028. [2021-08-21 18:55:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.694541231126597) internal successors, (16240), 6027 states have internal predecessors, (16240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 16240 transitions. [2021-08-21 18:55:25,500 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 16240 transitions. Word has length 29 [2021-08-21 18:55:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:25,500 INFO L470 AbstractCegarLoop]: Abstraction has 6028 states and 16240 transitions. [2021-08-21 18:55:25,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 5 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 18:55:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 16240 transitions. [2021-08-21 18:55:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:25,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:25,508 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:25,532 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 18:55:25,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:25,717 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:25,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2045349893, now seen corresponding path program 7 times [2021-08-21 18:55:25,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:25,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504348255] [2021-08-21 18:55:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:25,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:25,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:25,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504348255] [2021-08-21 18:55:25,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504348255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:25,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957661955] [2021-08-21 18:55:25,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:55:25,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:25,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:25,785 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 18:55:25,786 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 18:55:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:27,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:28,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957661955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:28,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:28,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:28,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6018949] [2021-08-21 18:55:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:28,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:28,082 INFO L87 Difference]: Start difference. First operand 6028 states and 16240 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:28,202 INFO L93 Difference]: Finished difference Result 7002 states and 18157 transitions. [2021-08-21 18:55:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:28,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:28,213 INFO L225 Difference]: With dead ends: 7002 [2021-08-21 18:55:28,213 INFO L226 Difference]: Without dead ends: 6995 [2021-08-21 18:55:28,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6995 states. [2021-08-21 18:55:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6995 to 5982. [2021-08-21 18:55:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5982 states, 5981 states have (on average 2.6880120381207155) internal successors, (16077), 5981 states have internal predecessors, (16077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5982 states to 5982 states and 16077 transitions. [2021-08-21 18:55:28,289 INFO L78 Accepts]: Start accepts. Automaton has 5982 states and 16077 transitions. Word has length 32 [2021-08-21 18:55:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:28,289 INFO L470 AbstractCegarLoop]: Abstraction has 5982 states and 16077 transitions. [2021-08-21 18:55:28,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5982 states and 16077 transitions. [2021-08-21 18:55:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:28,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:28,298 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:28,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:28,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:28,513 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:28,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:28,513 INFO L82 PathProgramCache]: Analyzing trace with hash 92411785, now seen corresponding path program 8 times [2021-08-21 18:55:28,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:28,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909347480] [2021-08-21 18:55:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:28,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:28,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:28,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909347480] [2021-08-21 18:55:28,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909347480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:28,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809487389] [2021-08-21 18:55:28,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:28,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:28,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:28,571 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 18:55:28,572 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 18:55:30,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:30,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:30,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809487389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:30,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:30,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:30,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978127498] [2021-08-21 18:55:30,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:30,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:30,901 INFO L87 Difference]: Start difference. First operand 5982 states and 16077 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:30,988 INFO L93 Difference]: Finished difference Result 7015 states and 18162 transitions. [2021-08-21 18:55:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:30,999 INFO L225 Difference]: With dead ends: 7015 [2021-08-21 18:55:30,999 INFO L226 Difference]: Without dead ends: 7008 [2021-08-21 18:55:31,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7008 states. [2021-08-21 18:55:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7008 to 6024. [2021-08-21 18:55:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 6023 states have (on average 2.685206707620787) internal successors, (16173), 6023 states have internal predecessors, (16173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 16173 transitions. [2021-08-21 18:55:31,079 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 16173 transitions. Word has length 32 [2021-08-21 18:55:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:31,079 INFO L470 AbstractCegarLoop]: Abstraction has 6024 states and 16173 transitions. [2021-08-21 18:55:31,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 16173 transitions. [2021-08-21 18:55:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:31,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:31,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:31,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 18:55:31,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:31,288 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:31,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1051838283, now seen corresponding path program 1 times [2021-08-21 18:55:31,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:31,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007268784] [2021-08-21 18:55:31,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:31,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:55:31,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:31,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007268784] [2021-08-21 18:55:31,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007268784] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:31,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:31,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:55:31,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408890162] [2021-08-21 18:55:31,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:31,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:31,347 INFO L87 Difference]: Start difference. First operand 6024 states and 16173 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:31,432 INFO L93 Difference]: Finished difference Result 7040 states and 18118 transitions. [2021-08-21 18:55:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:31,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:31,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:31,442 INFO L225 Difference]: With dead ends: 7040 [2021-08-21 18:55:31,442 INFO L226 Difference]: Without dead ends: 7033 [2021-08-21 18:55:31,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2021-08-21 18:55:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 6007. [2021-08-21 18:55:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6007 states, 6006 states have (on average 2.6844821844821847) internal successors, (16123), 6006 states have internal predecessors, (16123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6007 states to 6007 states and 16123 transitions. [2021-08-21 18:55:31,512 INFO L78 Accepts]: Start accepts. Automaton has 6007 states and 16123 transitions. Word has length 32 [2021-08-21 18:55:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:31,512 INFO L470 AbstractCegarLoop]: Abstraction has 6007 states and 16123 transitions. [2021-08-21 18:55:31,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6007 states and 16123 transitions. [2021-08-21 18:55:31,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:31,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:31,519 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:31,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-08-21 18:55:31,520 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash 661603337, now seen corresponding path program 1 times [2021-08-21 18:55:31,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:31,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086108383] [2021-08-21 18:55:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:31,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:55:31,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:31,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086108383] [2021-08-21 18:55:31,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086108383] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:31,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:31,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:55:31,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598444798] [2021-08-21 18:55:31,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:31,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:31,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:31,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:31,581 INFO L87 Difference]: Start difference. First operand 6007 states and 16123 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:31,693 INFO L93 Difference]: Finished difference Result 7042 states and 18125 transitions. [2021-08-21 18:55:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:31,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:31,705 INFO L225 Difference]: With dead ends: 7042 [2021-08-21 18:55:31,705 INFO L226 Difference]: Without dead ends: 7031 [2021-08-21 18:55:31,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:31,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7031 states. [2021-08-21 18:55:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7031 to 5984. [2021-08-21 18:55:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5984 states, 5983 states have (on average 2.6867792077553068) internal successors, (16075), 5983 states have internal predecessors, (16075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5984 states to 5984 states and 16075 transitions. [2021-08-21 18:55:31,786 INFO L78 Accepts]: Start accepts. Automaton has 5984 states and 16075 transitions. Word has length 32 [2021-08-21 18:55:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:31,787 INFO L470 AbstractCegarLoop]: Abstraction has 5984 states and 16075 transitions. [2021-08-21 18:55:31,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 5984 states and 16075 transitions. [2021-08-21 18:55:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:31,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:31,795 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] [2021-08-21 18:55:31,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-08-21 18:55:31,795 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:31,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:31,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1097772279, now seen corresponding path program 1 times [2021-08-21 18:55:31,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:31,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334115828] [2021-08-21 18:55:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:31,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:55:31,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:31,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334115828] [2021-08-21 18:55:31,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334115828] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:31,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:31,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:55:31,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966817498] [2021-08-21 18:55:31,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:31,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:31,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:31,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:31,853 INFO L87 Difference]: Start difference. First operand 5984 states and 16075 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:31,945 INFO L93 Difference]: Finished difference Result 6964 states and 17828 transitions. [2021-08-21 18:55:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:31,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:31,957 INFO L225 Difference]: With dead ends: 6964 [2021-08-21 18:55:31,957 INFO L226 Difference]: Without dead ends: 6957 [2021-08-21 18:55:31,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2021-08-21 18:55:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 5928. [2021-08-21 18:55:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 5927 states have (on average 2.6726843259659185) internal successors, (15841), 5927 states have internal predecessors, (15841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 15841 transitions. [2021-08-21 18:55:32,037 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 15841 transitions. Word has length 32 [2021-08-21 18:55:32,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:32,037 INFO L470 AbstractCegarLoop]: Abstraction has 5928 states and 15841 transitions. [2021-08-21 18:55:32,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 15841 transitions. [2021-08-21 18:55:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:32,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:32,044 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] [2021-08-21 18:55:32,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-08-21 18:55:32,045 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:32,045 INFO L82 PathProgramCache]: Analyzing trace with hash -296679295, now seen corresponding path program 2 times [2021-08-21 18:55:32,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:32,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961013360] [2021-08-21 18:55:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:32,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:32,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:32,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961013360] [2021-08-21 18:55:32,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961013360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:32,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132266319] [2021-08-21 18:55:32,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:32,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:32,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:32,103 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 18:55:32,104 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 18:55:34,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:34,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:34,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:34,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:34,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132266319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:34,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:34,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:34,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268282026] [2021-08-21 18:55:34,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:34,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:34,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:34,403 INFO L87 Difference]: Start difference. First operand 5928 states and 15841 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:34,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:34,511 INFO L93 Difference]: Finished difference Result 6844 states and 17575 transitions. [2021-08-21 18:55:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:34,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:34,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:34,521 INFO L225 Difference]: With dead ends: 6844 [2021-08-21 18:55:34,521 INFO L226 Difference]: Without dead ends: 6837 [2021-08-21 18:55:34,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6837 states. [2021-08-21 18:55:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6837 to 5925. [2021-08-21 18:55:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5925 states, 5924 states have (on average 2.6659351789331533) internal successors, (15793), 5924 states have internal predecessors, (15793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5925 states to 5925 states and 15793 transitions. [2021-08-21 18:55:34,611 INFO L78 Accepts]: Start accepts. Automaton has 5925 states and 15793 transitions. Word has length 32 [2021-08-21 18:55:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:34,612 INFO L470 AbstractCegarLoop]: Abstraction has 5925 states and 15793 transitions. [2021-08-21 18:55:34,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5925 states and 15793 transitions. [2021-08-21 18:55:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:34,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:34,619 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:34,642 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 18:55:34,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-21 18:55:34,819 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:34,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1257406607, now seen corresponding path program 2 times [2021-08-21 18:55:34,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:34,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236195458] [2021-08-21 18:55:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:34,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:34,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:34,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236195458] [2021-08-21 18:55:34,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236195458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:34,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49361913] [2021-08-21 18:55:34,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:34,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:34,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:34,877 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 18:55:34,877 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 18:55:37,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:37,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:37,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:37,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49361913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:37,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:37,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:37,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425098374] [2021-08-21 18:55:37,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:37,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:37,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:37,213 INFO L87 Difference]: Start difference. First operand 5925 states and 15793 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:37,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:37,297 INFO L93 Difference]: Finished difference Result 6788 states and 17432 transitions. [2021-08-21 18:55:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:37,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:37,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:37,307 INFO L225 Difference]: With dead ends: 6788 [2021-08-21 18:55:37,307 INFO L226 Difference]: Without dead ends: 6781 [2021-08-21 18:55:37,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6781 states. [2021-08-21 18:55:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6781 to 5923. [2021-08-21 18:55:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5923 states, 5922 states have (on average 2.6636271529888553) internal successors, (15774), 5922 states have internal predecessors, (15774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5923 states to 5923 states and 15774 transitions. [2021-08-21 18:55:37,382 INFO L78 Accepts]: Start accepts. Automaton has 5923 states and 15774 transitions. Word has length 32 [2021-08-21 18:55:37,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:37,382 INFO L470 AbstractCegarLoop]: Abstraction has 5923 states and 15774 transitions. [2021-08-21 18:55:37,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5923 states and 15774 transitions. [2021-08-21 18:55:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:37,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:37,390 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:37,413 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 18:55:37,590 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,SelfDestructingSolverStorable178 [2021-08-21 18:55:37,590 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash 146803597, now seen corresponding path program 2 times [2021-08-21 18:55:37,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:37,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930496874] [2021-08-21 18:55:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:37,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:37,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:37,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930496874] [2021-08-21 18:55:37,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930496874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:37,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271385336] [2021-08-21 18:55:37,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:37,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:37,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:37,649 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 18:55:37,649 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 18:55:39,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:39,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:39,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:39,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271385336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:40,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:40,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:40,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817616767] [2021-08-21 18:55:40,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:40,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:40,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:40,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:40,030 INFO L87 Difference]: Start difference. First operand 5923 states and 15774 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:40,120 INFO L93 Difference]: Finished difference Result 6721 states and 17261 transitions. [2021-08-21 18:55:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:40,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:40,131 INFO L225 Difference]: With dead ends: 6721 [2021-08-21 18:55:40,131 INFO L226 Difference]: Without dead ends: 6714 [2021-08-21 18:55:40,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6714 states. [2021-08-21 18:55:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6714 to 5915. [2021-08-21 18:55:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5915 states, 5914 states have (on average 2.6599594183293878) internal successors, (15731), 5914 states have internal predecessors, (15731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5915 states to 5915 states and 15731 transitions. [2021-08-21 18:55:40,201 INFO L78 Accepts]: Start accepts. Automaton has 5915 states and 15731 transitions. Word has length 32 [2021-08-21 18:55:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:40,201 INFO L470 AbstractCegarLoop]: Abstraction has 5915 states and 15731 transitions. [2021-08-21 18:55:40,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 5915 states and 15731 transitions. [2021-08-21 18:55:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:40,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:40,209 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:40,233 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 18:55:40,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-21 18:55:40,410 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2055183659, now seen corresponding path program 1 times [2021-08-21 18:55:40,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:40,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234584501] [2021-08-21 18:55:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:40,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:55:40,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:40,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234584501] [2021-08-21 18:55:40,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234584501] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:40,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:40,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:55:40,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805442373] [2021-08-21 18:55:40,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:40,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:40,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:40,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:40,467 INFO L87 Difference]: Start difference. First operand 5915 states and 15731 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:40,541 INFO L93 Difference]: Finished difference Result 6953 states and 17806 transitions. [2021-08-21 18:55:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:40,551 INFO L225 Difference]: With dead ends: 6953 [2021-08-21 18:55:40,551 INFO L226 Difference]: Without dead ends: 6942 [2021-08-21 18:55:40,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2021-08-21 18:55:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 5970. [2021-08-21 18:55:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5970 states, 5969 states have (on average 2.6568939520857766) internal successors, (15859), 5969 states have internal predecessors, (15859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5970 states to 5970 states and 15859 transitions. [2021-08-21 18:55:40,620 INFO L78 Accepts]: Start accepts. Automaton has 5970 states and 15859 transitions. Word has length 32 [2021-08-21 18:55:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:40,620 INFO L470 AbstractCegarLoop]: Abstraction has 5970 states and 15859 transitions. [2021-08-21 18:55:40,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 5970 states and 15859 transitions. [2021-08-21 18:55:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:40,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:40,628 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:40,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-08-21 18:55:40,628 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:40,628 INFO L82 PathProgramCache]: Analyzing trace with hash 480408021, now seen corresponding path program 1 times [2021-08-21 18:55:40,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:40,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806463940] [2021-08-21 18:55:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:40,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:55:40,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:40,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806463940] [2021-08-21 18:55:40,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806463940] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:40,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:40,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:55:40,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13078946] [2021-08-21 18:55:40,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:40,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:40,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:40,686 INFO L87 Difference]: Start difference. First operand 5970 states and 15859 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:40,769 INFO L93 Difference]: Finished difference Result 7026 states and 17892 transitions. [2021-08-21 18:55:40,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:40,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:40,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:40,779 INFO L225 Difference]: With dead ends: 7026 [2021-08-21 18:55:40,779 INFO L226 Difference]: Without dead ends: 7019 [2021-08-21 18:55:40,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7019 states. [2021-08-21 18:55:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7019 to 6016. [2021-08-21 18:55:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.655527847049044) internal successors, (15973), 6015 states have internal predecessors, (15973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 15973 transitions. [2021-08-21 18:55:40,889 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 15973 transitions. Word has length 32 [2021-08-21 18:55:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:40,889 INFO L470 AbstractCegarLoop]: Abstraction has 6016 states and 15973 transitions. [2021-08-21 18:55:40,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 15973 transitions. [2021-08-21 18:55:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:40,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:40,897 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] [2021-08-21 18:55:40,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-08-21 18:55:40,897 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2059238401, now seen corresponding path program 2 times [2021-08-21 18:55:40,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:40,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027743003] [2021-08-21 18:55:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:40,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:40,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:40,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027743003] [2021-08-21 18:55:40,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027743003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:40,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848333064] [2021-08-21 18:55:40,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:40,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:40,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:40,956 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 18:55:40,956 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 18:55:43,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:43,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:43,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:43,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:43,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848333064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:43,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:43,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:43,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346084493] [2021-08-21 18:55:43,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:43,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:43,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:43,358 INFO L87 Difference]: Start difference. First operand 6016 states and 15973 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:43,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:43,434 INFO L93 Difference]: Finished difference Result 6840 states and 17521 transitions. [2021-08-21 18:55:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:43,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:43,445 INFO L225 Difference]: With dead ends: 6840 [2021-08-21 18:55:43,445 INFO L226 Difference]: Without dead ends: 6833 [2021-08-21 18:55:43,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:43,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6833 states. [2021-08-21 18:55:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6833 to 6037. [2021-08-21 18:55:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6037 states, 6036 states have (on average 2.6540755467196817) internal successors, (16020), 6036 states have internal predecessors, (16020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 16020 transitions. [2021-08-21 18:55:43,554 INFO L78 Accepts]: Start accepts. Automaton has 6037 states and 16020 transitions. Word has length 32 [2021-08-21 18:55:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:43,554 INFO L470 AbstractCegarLoop]: Abstraction has 6037 states and 16020 transitions. [2021-08-21 18:55:43,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6037 states and 16020 transitions. [2021-08-21 18:55:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:43,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:43,561 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] [2021-08-21 18:55:43,586 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 18:55:43,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:43,762 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash -380291071, now seen corresponding path program 1 times [2021-08-21 18:55:43,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:43,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518276415] [2021-08-21 18:55:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:43,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:55:43,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:43,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518276415] [2021-08-21 18:55:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518276415] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:55:43,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:55:43,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:55:43,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276687981] [2021-08-21 18:55:43,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:43,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:43,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:43,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:43,825 INFO L87 Difference]: Start difference. First operand 6037 states and 16020 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:43,912 INFO L93 Difference]: Finished difference Result 7107 states and 18081 transitions. [2021-08-21 18:55:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:43,924 INFO L225 Difference]: With dead ends: 7107 [2021-08-21 18:55:43,925 INFO L226 Difference]: Without dead ends: 7096 [2021-08-21 18:55:43,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-08-21 18:55:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6045. [2021-08-21 18:55:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6045 states, 6044 states have (on average 2.651058901389808) internal successors, (16023), 6044 states have internal predecessors, (16023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6045 states to 6045 states and 16023 transitions. [2021-08-21 18:55:43,997 INFO L78 Accepts]: Start accepts. Automaton has 6045 states and 16023 transitions. Word has length 32 [2021-08-21 18:55:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:43,997 INFO L470 AbstractCegarLoop]: Abstraction has 6045 states and 16023 transitions. [2021-08-21 18:55:43,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6045 states and 16023 transitions. [2021-08-21 18:55:44,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:44,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:44,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:44,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-08-21 18:55:44,005 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash -427650431, now seen corresponding path program 7 times [2021-08-21 18:55:44,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:44,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195670070] [2021-08-21 18:55:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:44,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:44,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:44,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195670070] [2021-08-21 18:55:44,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195670070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:44,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391967882] [2021-08-21 18:55:44,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:55:44,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:44,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:44,064 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 18:55:44,064 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 18:55:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:46,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:46,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391967882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:46,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:46,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:46,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363387319] [2021-08-21 18:55:46,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:46,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:46,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:46,497 INFO L87 Difference]: Start difference. First operand 6045 states and 16023 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call 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 7044 states and 17933 transitions. [2021-08-21 18:55:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:46,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:46,600 INFO L225 Difference]: With dead ends: 7044 [2021-08-21 18:55:46,600 INFO L226 Difference]: Without dead ends: 7037 [2021-08-21 18:55:46,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7037 states. [2021-08-21 18:55:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7037 to 6041. [2021-08-21 18:55:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6041 states, 6040 states have (on average 2.644867549668874) internal successors, (15975), 6040 states have internal predecessors, (15975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6041 states to 6041 states and 15975 transitions. [2021-08-21 18:55:46,677 INFO L78 Accepts]: Start accepts. Automaton has 6041 states and 15975 transitions. Word has length 32 [2021-08-21 18:55:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:46,677 INFO L470 AbstractCegarLoop]: Abstraction has 6041 states and 15975 transitions. [2021-08-21 18:55:46,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 6041 states and 15975 transitions. [2021-08-21 18:55:46,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:46,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:46,685 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:46,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 18:55:46,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:46,886 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:46,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1538185597, now seen corresponding path program 8 times [2021-08-21 18:55:46,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:46,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380542728] [2021-08-21 18:55:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:46,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:46,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:46,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380542728] [2021-08-21 18:55:46,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380542728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:46,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334375228] [2021-08-21 18:55:46,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:46,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:46,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:46,946 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 18:55:46,947 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 18:55:49,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:49,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:49,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:49,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:49,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334375228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:49,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:49,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:49,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31436121] [2021-08-21 18:55:49,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:49,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:49,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:49,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:49,404 INFO L87 Difference]: Start difference. First operand 6041 states and 15975 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:49,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:49,489 INFO L93 Difference]: Finished difference Result 7046 states and 17896 transitions. [2021-08-21 18:55:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:49,499 INFO L225 Difference]: With dead ends: 7046 [2021-08-21 18:55:49,500 INFO L226 Difference]: Without dead ends: 7039 [2021-08-21 18:55:49,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:49,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7039 states. [2021-08-21 18:55:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7039 to 6037. [2021-08-21 18:55:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6037 states, 6036 states have (on average 2.639993373094765) internal successors, (15935), 6036 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 15935 transitions. [2021-08-21 18:55:49,571 INFO L78 Accepts]: Start accepts. Automaton has 6037 states and 15935 transitions. Word has length 32 [2021-08-21 18:55:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:49,571 INFO L470 AbstractCegarLoop]: Abstraction has 6037 states and 15935 transitions. [2021-08-21 18:55:49,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6037 states and 15935 transitions. [2021-08-21 18:55:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:49,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:49,578 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:49,602 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 18:55:49,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:49,779 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash -790945671, now seen corresponding path program 2 times [2021-08-21 18:55:49,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:49,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499270980] [2021-08-21 18:55:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:49,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:49,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:49,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499270980] [2021-08-21 18:55:49,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499270980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:49,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253887377] [2021-08-21 18:55:49,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:49,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:49,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:49,846 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 18:55:49,846 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 18:55:52,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:52,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:52,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:52,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:52,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253887377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:52,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:52,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:52,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616009142] [2021-08-21 18:55:52,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:52,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:52,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:52,272 INFO L87 Difference]: Start difference. First operand 6037 states and 15935 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:52,358 INFO L93 Difference]: Finished difference Result 6934 states and 17631 transitions. [2021-08-21 18:55:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:52,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:52,369 INFO L225 Difference]: With dead ends: 6934 [2021-08-21 18:55:52,369 INFO L226 Difference]: Without dead ends: 6927 [2021-08-21 18:55:52,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2021-08-21 18:55:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 6035. [2021-08-21 18:55:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 6034 states have (on average 2.6380510440835265) internal successors, (15918), 6034 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:52,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 15918 transitions. [2021-08-21 18:55:52,447 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 15918 transitions. Word has length 32 [2021-08-21 18:55:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:52,447 INFO L470 AbstractCegarLoop]: Abstraction has 6035 states and 15918 transitions. [2021-08-21 18:55:52,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 15918 transitions. [2021-08-21 18:55:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:52,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:52,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:52,479 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 18:55:52,655 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,SelfDestructingSolverStorable186 [2021-08-21 18:55:52,656 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:52,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1174890357, now seen corresponding path program 2 times [2021-08-21 18:55:52,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:52,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173149140] [2021-08-21 18:55:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:52,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:52,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:52,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173149140] [2021-08-21 18:55:52,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173149140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:52,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329499507] [2021-08-21 18:55:52,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:55:52,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:52,715 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 18:55:52,715 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 18:55:55,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:55:55,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:55,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:55,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:55,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329499507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:55,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:55,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:55,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157533588] [2021-08-21 18:55:55,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:55,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:55,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:55,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:55,197 INFO L87 Difference]: Start difference. First operand 6035 states and 15918 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:55,279 INFO L93 Difference]: Finished difference Result 6978 states and 17696 transitions. [2021-08-21 18:55:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:55,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:55,289 INFO L225 Difference]: With dead ends: 6978 [2021-08-21 18:55:55,290 INFO L226 Difference]: Without dead ends: 6971 [2021-08-21 18:55:55,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6971 states. [2021-08-21 18:55:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6971 to 6025. [2021-08-21 18:55:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 6024 states have (on average 2.634130146082337) internal successors, (15868), 6024 states have internal predecessors, (15868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 15868 transitions. [2021-08-21 18:55:55,361 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 15868 transitions. Word has length 32 [2021-08-21 18:55:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:55,361 INFO L470 AbstractCegarLoop]: Abstraction has 6025 states and 15868 transitions. [2021-08-21 18:55:55,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 15868 transitions. [2021-08-21 18:55:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:55,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:55,369 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:55,393 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 18:55:55,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:55,569 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:55,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1498946697, now seen corresponding path program 9 times [2021-08-21 18:55:55,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:55,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509347072] [2021-08-21 18:55:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:55,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:55,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:55,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509347072] [2021-08-21 18:55:55,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509347072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:55,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248935768] [2021-08-21 18:55:55,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:55:55,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:55,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:55,628 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 18:55:55,628 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 18:55:57,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:55:57,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:55:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:55:57,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:55:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:58,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248935768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:58,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:55:58,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:55:58,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73827139] [2021-08-21 18:55:58,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:55:58,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:55:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:55:58,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:58,104 INFO L87 Difference]: Start difference. First operand 6025 states and 15868 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:55:58,190 INFO L93 Difference]: Finished difference Result 7004 states and 17737 transitions. [2021-08-21 18:55:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:55:58,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:55:58,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:55:58,200 INFO L225 Difference]: With dead ends: 7004 [2021-08-21 18:55:58,200 INFO L226 Difference]: Without dead ends: 6997 [2021-08-21 18:55:58,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:55:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6997 states. [2021-08-21 18:55:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6997 to 6031. [2021-08-21 18:55:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6031 states, 6030 states have (on average 2.633167495854063) internal successors, (15878), 6030 states have internal predecessors, (15878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 15878 transitions. [2021-08-21 18:55:58,273 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 15878 transitions. Word has length 32 [2021-08-21 18:55:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:55:58,273 INFO L470 AbstractCegarLoop]: Abstraction has 6031 states and 15878 transitions. [2021-08-21 18:55:58,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:55:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 15878 transitions. [2021-08-21 18:55:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:55:58,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:55:58,280 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:55:58,304 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 18:55:58,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:58,481 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:55:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:55:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash 683430205, now seen corresponding path program 7 times [2021-08-21 18:55:58,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:55:58,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778679506] [2021-08-21 18:55:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:55:58,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:55:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:55:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:55:58,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:55:58,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778679506] [2021-08-21 18:55:58,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778679506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:55:58,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82041120] [2021-08-21 18:55:58,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:55:58,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:55:58,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:55:58,540 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 18:55:58,540 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 18:56:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:00,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:00,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:01,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82041120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:01,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:01,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:01,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290149555] [2021-08-21 18:56:01,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:01,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:01,042 INFO L87 Difference]: Start difference. First operand 6031 states and 15878 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:01,123 INFO L93 Difference]: Finished difference Result 6980 states and 17726 transitions. [2021-08-21 18:56:01,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:01,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:01,134 INFO L225 Difference]: With dead ends: 6980 [2021-08-21 18:56:01,134 INFO L226 Difference]: Without dead ends: 6973 [2021-08-21 18:56:01,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6973 states. [2021-08-21 18:56:01,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6973 to 6083. [2021-08-21 18:56:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 2.6330154554422887) internal successors, (16014), 6082 states have internal predecessors, (16014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 16014 transitions. [2021-08-21 18:56:01,252 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 16014 transitions. Word has length 32 [2021-08-21 18:56:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:01,252 INFO L470 AbstractCegarLoop]: Abstraction has 6083 states and 16014 transitions. [2021-08-21 18:56:01,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 16014 transitions. [2021-08-21 18:56:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:01,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:01,260 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:01,283 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 18:56:01,461 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,SelfDestructingSolverStorable189 [2021-08-21 18:56:01,461 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1898095471, now seen corresponding path program 7 times [2021-08-21 18:56:01,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:01,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819596697] [2021-08-21 18:56:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:01,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:01,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:01,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819596697] [2021-08-21 18:56:01,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819596697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:01,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979361908] [2021-08-21 18:56:01,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:56:01,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:01,523 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 18:56:01,523 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 18:56:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:04,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979361908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:04,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:04,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:04,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015459095] [2021-08-21 18:56:04,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:04,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:04,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:04,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:04,014 INFO L87 Difference]: Start difference. First operand 6083 states and 16014 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:04,090 INFO L93 Difference]: Finished difference Result 7095 states and 17981 transitions. [2021-08-21 18:56:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:04,100 INFO L225 Difference]: With dead ends: 7095 [2021-08-21 18:56:04,100 INFO L226 Difference]: Without dead ends: 7084 [2021-08-21 18:56:04,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:04,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7084 states. [2021-08-21 18:56:04,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7084 to 6147. [2021-08-21 18:56:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6147 states, 6146 states have (on average 2.6303286690530427) internal successors, (16166), 6146 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 16166 transitions. [2021-08-21 18:56:04,177 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 16166 transitions. Word has length 32 [2021-08-21 18:56:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:04,177 INFO L470 AbstractCegarLoop]: Abstraction has 6147 states and 16166 transitions. [2021-08-21 18:56:04,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 16166 transitions. [2021-08-21 18:56:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:04,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:04,185 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:04,208 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 18:56:04,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-21 18:56:04,387 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:04,387 INFO L82 PathProgramCache]: Analyzing trace with hash 637496209, now seen corresponding path program 9 times [2021-08-21 18:56:04,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:04,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992669326] [2021-08-21 18:56:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:04,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:04,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:04,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992669326] [2021-08-21 18:56:04,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992669326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:04,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598762199] [2021-08-21 18:56:04,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:04,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:04,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:04,449 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 18:56:04,450 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 18:56:06,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:56:06,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:06,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:06,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:06,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598762199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:06,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:06,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:06,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667248943] [2021-08-21 18:56:06,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:06,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:06,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:06,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:06,958 INFO L87 Difference]: Start difference. First operand 6147 states and 16166 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:07,043 INFO L93 Difference]: Finished difference Result 7127 states and 17967 transitions. [2021-08-21 18:56:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:07,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:07,053 INFO L225 Difference]: With dead ends: 7127 [2021-08-21 18:56:07,053 INFO L226 Difference]: Without dead ends: 7120 [2021-08-21 18:56:07,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7120 states. [2021-08-21 18:56:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7120 to 6160. [2021-08-21 18:56:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 2.6246143854521837) internal successors, (16165), 6159 states have internal predecessors, (16165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 16165 transitions. [2021-08-21 18:56:07,129 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 16165 transitions. Word has length 32 [2021-08-21 18:56:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:07,129 INFO L470 AbstractCegarLoop]: Abstraction has 6160 states and 16165 transitions. [2021-08-21 18:56:07,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:07,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 16165 transitions. [2021-08-21 18:56:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:07,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:07,138 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:07,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-21 18:56:07,338 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,SelfDestructingSolverStorable191 [2021-08-21 18:56:07,338 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:07,339 INFO L82 PathProgramCache]: Analyzing trace with hash -486422771, now seen corresponding path program 10 times [2021-08-21 18:56:07,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:07,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892054187] [2021-08-21 18:56:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:07,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:07,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:07,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892054187] [2021-08-21 18:56:07,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892054187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:07,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166975693] [2021-08-21 18:56:07,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:07,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:07,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:07,401 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 18:56:07,401 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 18:56:09,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:09,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:09,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:09,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:09,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166975693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:09,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:09,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:09,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620200609] [2021-08-21 18:56:09,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:09,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:09,964 INFO L87 Difference]: Start difference. First operand 6160 states and 16165 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:10,056 INFO L93 Difference]: Finished difference Result 7116 states and 18135 transitions. [2021-08-21 18:56:10,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:10,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:10,068 INFO L225 Difference]: With dead ends: 7116 [2021-08-21 18:56:10,068 INFO L226 Difference]: Without dead ends: 7109 [2021-08-21 18:56:10,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7109 states. [2021-08-21 18:56:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7109 to 6232. [2021-08-21 18:56:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 2.629754453538758) internal successors, (16386), 6231 states have internal predecessors, (16386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 16386 transitions. [2021-08-21 18:56:10,144 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 16386 transitions. Word has length 32 [2021-08-21 18:56:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:10,145 INFO L470 AbstractCegarLoop]: Abstraction has 6232 states and 16386 transitions. [2021-08-21 18:56:10,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 16386 transitions. [2021-08-21 18:56:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:10,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:10,153 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:10,177 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 18:56:10,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:10,355 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:10,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1630672839, now seen corresponding path program 3 times [2021-08-21 18:56:10,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:10,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427718380] [2021-08-21 18:56:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:10,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:10,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:10,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427718380] [2021-08-21 18:56:10,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427718380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:10,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537273788] [2021-08-21 18:56:10,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:10,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:10,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:10,414 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 18:56:10,415 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 18:56:12,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:56:12,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:12,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:12,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:12,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537273788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:12,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:12,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:12,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829091732] [2021-08-21 18:56:12,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:12,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:12,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:12,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:12,969 INFO L87 Difference]: Start difference. First operand 6232 states and 16386 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:13,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:13,058 INFO L93 Difference]: Finished difference Result 7247 states and 18419 transitions. [2021-08-21 18:56:13,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:13,069 INFO L225 Difference]: With dead ends: 7247 [2021-08-21 18:56:13,069 INFO L226 Difference]: Without dead ends: 7240 [2021-08-21 18:56:13,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7240 states. [2021-08-21 18:56:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7240 to 6278. [2021-08-21 18:56:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6278 states, 6277 states have (on average 2.633423610004779) internal successors, (16530), 6277 states have internal predecessors, (16530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6278 states to 6278 states and 16530 transitions. [2021-08-21 18:56:13,142 INFO L78 Accepts]: Start accepts. Automaton has 6278 states and 16530 transitions. Word has length 32 [2021-08-21 18:56:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:13,142 INFO L470 AbstractCegarLoop]: Abstraction has 6278 states and 16530 transitions. [2021-08-21 18:56:13,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 6278 states and 16530 transitions. [2021-08-21 18:56:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:13,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:13,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:13,175 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 18:56:13,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:13,351 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:13,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:13,351 INFO L82 PathProgramCache]: Analyzing trace with hash 82768781, now seen corresponding path program 3 times [2021-08-21 18:56:13,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:13,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708957199] [2021-08-21 18:56:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:13,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:13,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:13,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708957199] [2021-08-21 18:56:13,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708957199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:13,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200454316] [2021-08-21 18:56:13,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:13,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:13,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:13,411 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 18:56:13,412 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 18:56:15,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:56:15,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:15,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:15,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:16,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200454316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:16,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:16,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:16,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820627863] [2021-08-21 18:56:16,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:16,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:16,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:16,038 INFO L87 Difference]: Start difference. First operand 6278 states and 16530 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:16,129 INFO L93 Difference]: Finished difference Result 7364 states and 18657 transitions. [2021-08-21 18:56:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:16,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:16,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:16,140 INFO L225 Difference]: With dead ends: 7364 [2021-08-21 18:56:16,140 INFO L226 Difference]: Without dead ends: 7353 [2021-08-21 18:56:16,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:16,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7353 states. [2021-08-21 18:56:16,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7353 to 6336. [2021-08-21 18:56:16,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6336 states, 6335 states have (on average 2.628413575374901) internal successors, (16651), 6335 states have internal predecessors, (16651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6336 states to 6336 states and 16651 transitions. [2021-08-21 18:56:16,215 INFO L78 Accepts]: Start accepts. Automaton has 6336 states and 16651 transitions. Word has length 32 [2021-08-21 18:56:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:16,215 INFO L470 AbstractCegarLoop]: Abstraction has 6336 states and 16651 transitions. [2021-08-21 18:56:16,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 6336 states and 16651 transitions. [2021-08-21 18:56:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:16,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:16,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:16,247 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 18:56:16,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:16,423 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1676606835, now seen corresponding path program 3 times [2021-08-21 18:56:16,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:16,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568054202] [2021-08-21 18:56:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:16,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:16,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:16,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568054202] [2021-08-21 18:56:16,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568054202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:16,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815023298] [2021-08-21 18:56:16,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:16,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:16,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:16,492 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 18:56:16,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 18:56:18,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:56:18,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:18,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:19,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815023298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:19,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:19,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:19,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601829368] [2021-08-21 18:56:19,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:19,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:19,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:19,101 INFO L87 Difference]: Start difference. First operand 6336 states and 16651 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:19,195 INFO L93 Difference]: Finished difference Result 7393 states and 18735 transitions. [2021-08-21 18:56:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:19,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:19,205 INFO L225 Difference]: With dead ends: 7393 [2021-08-21 18:56:19,206 INFO L226 Difference]: Without dead ends: 7386 [2021-08-21 18:56:19,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:19,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7386 states. [2021-08-21 18:56:19,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7386 to 6411. [2021-08-21 18:56:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6411 states, 6410 states have (on average 2.6310452418096726) internal successors, (16865), 6410 states have internal predecessors, (16865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6411 states to 6411 states and 16865 transitions. [2021-08-21 18:56:19,282 INFO L78 Accepts]: Start accepts. Automaton has 6411 states and 16865 transitions. Word has length 32 [2021-08-21 18:56:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:19,282 INFO L470 AbstractCegarLoop]: Abstraction has 6411 states and 16865 transitions. [2021-08-21 18:56:19,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 6411 states and 16865 transitions. [2021-08-21 18:56:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:19,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:19,291 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] [2021-08-21 18:56:19,316 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 18:56:19,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:19,491 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:19,492 INFO L82 PathProgramCache]: Analyzing trace with hash -875513851, now seen corresponding path program 4 times [2021-08-21 18:56:19,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:19,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652903487] [2021-08-21 18:56:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:19,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:19,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:19,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652903487] [2021-08-21 18:56:19,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652903487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:19,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367760600] [2021-08-21 18:56:19,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:19,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:19,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:19,551 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:19,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 18:56:22,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:22,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:22,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:22,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367760600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:22,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:22,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:22,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852542095] [2021-08-21 18:56:22,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:22,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:22,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:22,194 INFO L87 Difference]: Start difference. First operand 6411 states and 16865 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:22,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:22,295 INFO L93 Difference]: Finished difference Result 7373 states and 18801 transitions. [2021-08-21 18:56:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:22,306 INFO L225 Difference]: With dead ends: 7373 [2021-08-21 18:56:22,306 INFO L226 Difference]: Without dead ends: 7366 [2021-08-21 18:56:22,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2021-08-21 18:56:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 6450. [2021-08-21 18:56:22,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 2.6337416653744765) internal successors, (16985), 6449 states have internal predecessors, (16985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 16985 transitions. [2021-08-21 18:56:22,381 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 16985 transitions. Word has length 32 [2021-08-21 18:56:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:22,381 INFO L470 AbstractCegarLoop]: Abstraction has 6450 states and 16985 transitions. [2021-08-21 18:56:22,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 16985 transitions. [2021-08-21 18:56:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:22,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:22,389 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:22,414 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 18:56:22,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:22,589 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:22,590 INFO L82 PathProgramCache]: Analyzing trace with hash -404567287, now seen corresponding path program 11 times [2021-08-21 18:56:22,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:22,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383951823] [2021-08-21 18:56:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:22,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:22,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:22,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383951823] [2021-08-21 18:56:22,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383951823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:22,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247277278] [2021-08-21 18:56:22,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:56:22,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:22,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:22,650 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:22,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 18:56:25,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:56:25,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:25,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247277278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:25,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:25,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:25,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924385979] [2021-08-21 18:56:25,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:25,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:25,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:25,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:25,363 INFO L87 Difference]: Start difference. First operand 6450 states and 16985 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:25,454 INFO L93 Difference]: Finished difference Result 7308 states and 18664 transitions. [2021-08-21 18:56:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:25,464 INFO L225 Difference]: With dead ends: 7308 [2021-08-21 18:56:25,465 INFO L226 Difference]: Without dead ends: 7301 [2021-08-21 18:56:25,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-08-21 18:56:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 6462. [2021-08-21 18:56:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6462 states, 6461 states have (on average 2.6325646184801115) internal successors, (17009), 6461 states have internal predecessors, (17009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:25,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 17009 transitions. [2021-08-21 18:56:25,536 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 17009 transitions. Word has length 32 [2021-08-21 18:56:25,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:25,536 INFO L470 AbstractCegarLoop]: Abstraction has 6462 states and 17009 transitions. [2021-08-21 18:56:25,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:25,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 17009 transitions. [2021-08-21 18:56:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:25,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:25,544 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:25,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-21 18:56:25,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:25,745 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1982856651, now seen corresponding path program 7 times [2021-08-21 18:56:25,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:25,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117872087] [2021-08-21 18:56:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:25,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:25,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:25,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117872087] [2021-08-21 18:56:25,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117872087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:25,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497890255] [2021-08-21 18:56:25,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:56:25,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:25,804 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:25,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 18:56:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:28,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:28,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:28,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497890255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:28,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:28,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:28,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847078118] [2021-08-21 18:56:28,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:28,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:28,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:28,505 INFO L87 Difference]: Start difference. First operand 6462 states and 17009 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:28,593 INFO L93 Difference]: Finished difference Result 7470 states and 19011 transitions. [2021-08-21 18:56:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:28,604 INFO L225 Difference]: With dead ends: 7470 [2021-08-21 18:56:28,604 INFO L226 Difference]: Without dead ends: 7463 [2021-08-21 18:56:28,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7463 states. [2021-08-21 18:56:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7463 to 6479. [2021-08-21 18:56:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 6478 states have (on average 2.6346094473602966) internal successors, (17067), 6478 states have internal predecessors, (17067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 17067 transitions. [2021-08-21 18:56:28,683 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 17067 transitions. Word has length 32 [2021-08-21 18:56:28,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:28,683 INFO L470 AbstractCegarLoop]: Abstraction has 6479 states and 17067 transitions. [2021-08-21 18:56:28,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:28,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 17067 transitions. [2021-08-21 18:56:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:28,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:28,691 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:28,715 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 18:56:28,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:28,892 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash -269415031, now seen corresponding path program 7 times [2021-08-21 18:56:28,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:28,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006694093] [2021-08-21 18:56:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:28,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:28,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:28,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006694093] [2021-08-21 18:56:28,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006694093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:28,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142807226] [2021-08-21 18:56:28,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:56:28,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:28,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:28,952 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:28,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 18:56:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:31,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:31,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142807226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:31,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:31,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:31,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824871879] [2021-08-21 18:56:31,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:31,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:31,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:31,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:31,684 INFO L87 Difference]: Start difference. First operand 6479 states and 17067 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:31,768 INFO L93 Difference]: Finished difference Result 7544 states and 19141 transitions. [2021-08-21 18:56:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:31,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:31,778 INFO L225 Difference]: With dead ends: 7544 [2021-08-21 18:56:31,779 INFO L226 Difference]: Without dead ends: 7533 [2021-08-21 18:56:31,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7533 states. [2021-08-21 18:56:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7533 to 6490. [2021-08-21 18:56:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6490 states, 6489 states have (on average 2.6313761750654954) internal successors, (17075), 6489 states have internal predecessors, (17075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6490 states to 6490 states and 17075 transitions. [2021-08-21 18:56:31,856 INFO L78 Accepts]: Start accepts. Automaton has 6490 states and 17075 transitions. Word has length 32 [2021-08-21 18:56:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:31,856 INFO L470 AbstractCegarLoop]: Abstraction has 6490 states and 17075 transitions. [2021-08-21 18:56:31,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:31,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6490 states and 17075 transitions. [2021-08-21 18:56:31,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:31,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:31,865 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] [2021-08-21 18:56:31,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-21 18:56:32,065 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,SelfDestructingSolverStorable199 [2021-08-21 18:56:32,065 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:32,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:32,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2028790647, now seen corresponding path program 7 times [2021-08-21 18:56:32,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:32,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217290242] [2021-08-21 18:56:32,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:32,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:32,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:32,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217290242] [2021-08-21 18:56:32,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217290242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:32,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277293027] [2021-08-21 18:56:32,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:56:32,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:32,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:32,125 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:32,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 18:56:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:34,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:34,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277293027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:34,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:34,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:34,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742702131] [2021-08-21 18:56:34,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:34,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:34,836 INFO L87 Difference]: Start difference. First operand 6490 states and 17075 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:34,935 INFO L93 Difference]: Finished difference Result 7521 states and 19057 transitions. [2021-08-21 18:56:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:34,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:34,946 INFO L225 Difference]: With dead ends: 7521 [2021-08-21 18:56:34,946 INFO L226 Difference]: Without dead ends: 7514 [2021-08-21 18:56:34,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7514 states. [2021-08-21 18:56:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7514 to 6518. [2021-08-21 18:56:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 2.625901488414915) internal successors, (17113), 6517 states have internal predecessors, (17113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 17113 transitions. [2021-08-21 18:56:35,033 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 17113 transitions. Word has length 32 [2021-08-21 18:56:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:35,034 INFO L470 AbstractCegarLoop]: Abstraction has 6518 states and 17113 transitions. [2021-08-21 18:56:35,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 17113 transitions. [2021-08-21 18:56:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:35,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:35,043 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:35,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:35,244 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,SelfDestructingSolverStorable200 [2021-08-21 18:56:35,244 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:35,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1227697663, now seen corresponding path program 8 times [2021-08-21 18:56:35,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:35,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989126814] [2021-08-21 18:56:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:35,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:35,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:35,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989126814] [2021-08-21 18:56:35,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989126814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:35,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835370764] [2021-08-21 18:56:35,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:35,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:35,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:35,303 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:35,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 18:56:37,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:37,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:56:38,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835370764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:38,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:38,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:38,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510762433] [2021-08-21 18:56:38,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:38,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:38,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:38,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:38,025 INFO L87 Difference]: Start difference. First operand 6518 states and 17113 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:38,128 INFO L93 Difference]: Finished difference Result 7472 states and 19009 transitions. [2021-08-21 18:56:38,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:38,139 INFO L225 Difference]: With dead ends: 7472 [2021-08-21 18:56:38,139 INFO L226 Difference]: Without dead ends: 7465 [2021-08-21 18:56:38,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7465 states. [2021-08-21 18:56:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7465 to 6534. [2021-08-21 18:56:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6534 states, 6533 states have (on average 2.623756314097658) internal successors, (17141), 6533 states have internal predecessors, (17141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6534 states to 6534 states and 17141 transitions. [2021-08-21 18:56:38,214 INFO L78 Accepts]: Start accepts. Automaton has 6534 states and 17141 transitions. Word has length 32 [2021-08-21 18:56:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:38,214 INFO L470 AbstractCegarLoop]: Abstraction has 6534 states and 17141 transitions. [2021-08-21 18:56:38,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:38,214 INFO L276 IsEmpty]: Start isEmpty. Operand 6534 states and 17141 transitions. [2021-08-21 18:56:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:38,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:38,222 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] [2021-08-21 18:56:38,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-21 18:56:38,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:38,423 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:38,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:38,423 INFO L82 PathProgramCache]: Analyzing trace with hash -930907007, now seen corresponding path program 4 times [2021-08-21 18:56:38,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:38,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502695708] [2021-08-21 18:56:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:38,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:38,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:38,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502695708] [2021-08-21 18:56:38,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502695708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:38,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379616274] [2021-08-21 18:56:38,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:38,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:38,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:38,482 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:38,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 18:56:41,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:41,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:41,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:41,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:41,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379616274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:41,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:41,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:41,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107300589] [2021-08-21 18:56:41,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:41,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:41,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:41,248 INFO L87 Difference]: Start difference. First operand 6534 states and 17141 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:41,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:41,332 INFO L93 Difference]: Finished difference Result 7513 states and 19027 transitions. [2021-08-21 18:56:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:41,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:41,343 INFO L225 Difference]: With dead ends: 7513 [2021-08-21 18:56:41,343 INFO L226 Difference]: Without dead ends: 7506 [2021-08-21 18:56:41,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:41,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7506 states. [2021-08-21 18:56:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7506 to 6541. [2021-08-21 18:56:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6541 states, 6540 states have (on average 2.6250764525993886) internal successors, (17168), 6540 states have internal predecessors, (17168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6541 states to 6541 states and 17168 transitions. [2021-08-21 18:56:41,422 INFO L78 Accepts]: Start accepts. Automaton has 6541 states and 17168 transitions. Word has length 32 [2021-08-21 18:56:41,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:41,422 INFO L470 AbstractCegarLoop]: Abstraction has 6541 states and 17168 transitions. [2021-08-21 18:56:41,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 6541 states and 17168 transitions. [2021-08-21 18:56:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:41,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:41,431 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:41,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:41,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-21 18:56:41,631 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:41,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1137271181, now seen corresponding path program 4 times [2021-08-21 18:56:41,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:41,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777302109] [2021-08-21 18:56:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:41,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:41,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:41,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777302109] [2021-08-21 18:56:41,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777302109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:41,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375243048] [2021-08-21 18:56:41,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:56:41,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:41,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:41,692 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:41,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 18:56:44,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:56:44,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:44,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:44,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:44,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375243048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:44,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:44,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:44,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478941693] [2021-08-21 18:56:44,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:44,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:44,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:44,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:44,447 INFO L87 Difference]: Start difference. First operand 6541 states and 17168 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:44,535 INFO L93 Difference]: Finished difference Result 7445 states and 18880 transitions. [2021-08-21 18:56:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:44,547 INFO L225 Difference]: With dead ends: 7445 [2021-08-21 18:56:44,547 INFO L226 Difference]: Without dead ends: 7438 [2021-08-21 18:56:44,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2021-08-21 18:56:44,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 6508. [2021-08-21 18:56:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6508 states, 6507 states have (on average 2.6174888581527584) internal successors, (17032), 6507 states have internal predecessors, (17032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6508 states to 6508 states and 17032 transitions. [2021-08-21 18:56:44,638 INFO L78 Accepts]: Start accepts. Automaton has 6508 states and 17032 transitions. Word has length 32 [2021-08-21 18:56:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:44,638 INFO L470 AbstractCegarLoop]: Abstraction has 6508 states and 17032 transitions. [2021-08-21 18:56:44,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 6508 states and 17032 transitions. [2021-08-21 18:56:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:44,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:44,649 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:44,675 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 18:56:44,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-08-21 18:56:44,850 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:44,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:44,850 INFO L82 PathProgramCache]: Analyzing trace with hash 532237533, now seen corresponding path program 1 times [2021-08-21 18:56:44,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:44,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379698595] [2021-08-21 18:56:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:44,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:56:44,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:44,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379698595] [2021-08-21 18:56:44,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379698595] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:56:44,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:56:44,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:56:44,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168598842] [2021-08-21 18:56:44,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:44,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:44,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:44,934 INFO L87 Difference]: Start difference. First operand 6508 states and 17032 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:45,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:45,016 INFO L93 Difference]: Finished difference Result 7654 states and 19284 transitions. [2021-08-21 18:56:45,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:45,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:45,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:45,028 INFO L225 Difference]: With dead ends: 7654 [2021-08-21 18:56:45,029 INFO L226 Difference]: Without dead ends: 7643 [2021-08-21 18:56:45,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7643 states. [2021-08-21 18:56:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7643 to 6600. [2021-08-21 18:56:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6600 states, 6599 states have (on average 2.6111532050310653) internal successors, (17231), 6599 states have internal predecessors, (17231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 17231 transitions. [2021-08-21 18:56:45,116 INFO L78 Accepts]: Start accepts. Automaton has 6600 states and 17231 transitions. Word has length 32 [2021-08-21 18:56:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:45,117 INFO L470 AbstractCegarLoop]: Abstraction has 6600 states and 17231 transitions. [2021-08-21 18:56:45,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 6600 states and 17231 transitions. [2021-08-21 18:56:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:45,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:45,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:45,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-08-21 18:56:45,127 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:45,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1227138083, now seen corresponding path program 1 times [2021-08-21 18:56:45,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:45,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88079916] [2021-08-21 18:56:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:45,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:56:45,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:45,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88079916] [2021-08-21 18:56:45,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88079916] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:56:45,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:56:45,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:56:45,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311239247] [2021-08-21 18:56:45,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:45,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:45,194 INFO L87 Difference]: Start difference. First operand 6600 states and 17231 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:45,349 INFO L93 Difference]: Finished difference Result 7690 states and 19305 transitions. [2021-08-21 18:56:45,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:45,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:45,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:45,364 INFO L225 Difference]: With dead ends: 7690 [2021-08-21 18:56:45,365 INFO L226 Difference]: Without dead ends: 7683 [2021-08-21 18:56:45,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7683 states. [2021-08-21 18:56:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7683 to 6651. [2021-08-21 18:56:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6651 states, 6650 states have (on average 2.6141353383458648) internal successors, (17384), 6650 states have internal predecessors, (17384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6651 states to 6651 states and 17384 transitions. [2021-08-21 18:56:45,470 INFO L78 Accepts]: Start accepts. Automaton has 6651 states and 17384 transitions. Word has length 32 [2021-08-21 18:56:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:45,471 INFO L470 AbstractCegarLoop]: Abstraction has 6651 states and 17384 transitions. [2021-08-21 18:56:45,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6651 states and 17384 transitions. [2021-08-21 18:56:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:45,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:45,484 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:45,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-08-21 18:56:45,484 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 351692297, now seen corresponding path program 2 times [2021-08-21 18:56:45,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:45,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694005116] [2021-08-21 18:56:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:45,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:45,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:45,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694005116] [2021-08-21 18:56:45,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694005116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:45,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000918120] [2021-08-21 18:56:45,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:45,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:45,559 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:45,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 18:56:48,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:48,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:48,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:48,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000918120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:48,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:48,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:48,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499436901] [2021-08-21 18:56:48,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:48,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:48,470 INFO L87 Difference]: Start difference. First operand 6651 states and 17384 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:48,559 INFO L93 Difference]: Finished difference Result 7603 states and 19196 transitions. [2021-08-21 18:56:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:48,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:48,573 INFO L225 Difference]: With dead ends: 7603 [2021-08-21 18:56:48,574 INFO L226 Difference]: Without dead ends: 7596 [2021-08-21 18:56:48,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7596 states. [2021-08-21 18:56:48,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7596 to 6677. [2021-08-21 18:56:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6676 states have (on average 2.60964649490713) internal successors, (17422), 6676 states have internal predecessors, (17422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 17422 transitions. [2021-08-21 18:56:48,656 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 17422 transitions. Word has length 32 [2021-08-21 18:56:48,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:48,656 INFO L470 AbstractCegarLoop]: Abstraction has 6677 states and 17422 transitions. [2021-08-21 18:56:48,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 17422 transitions. [2021-08-21 18:56:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:48,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:48,665 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:48,691 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 18:56:48,866 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,SelfDestructingSolverStorable206 [2021-08-21 18:56:48,866 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2087837175, now seen corresponding path program 1 times [2021-08-21 18:56:48,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:48,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558531272] [2021-08-21 18:56:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:48,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:56:48,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:48,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558531272] [2021-08-21 18:56:48,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558531272] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:56:48,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:56:48,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:56:48,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132711767] [2021-08-21 18:56:48,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:48,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:48,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:48,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:48,926 INFO L87 Difference]: Start difference. First operand 6677 states and 17422 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:49,011 INFO L93 Difference]: Finished difference Result 7846 states and 19640 transitions. [2021-08-21 18:56:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:49,022 INFO L225 Difference]: With dead ends: 7846 [2021-08-21 18:56:49,022 INFO L226 Difference]: Without dead ends: 7835 [2021-08-21 18:56:49,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7835 states. [2021-08-21 18:56:49,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7835 to 6739. [2021-08-21 18:56:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6739 states, 6738 states have (on average 2.602107450281983) internal successors, (17533), 6738 states have internal predecessors, (17533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6739 states to 6739 states and 17533 transitions. [2021-08-21 18:56:49,144 INFO L78 Accepts]: Start accepts. Automaton has 6739 states and 17533 transitions. Word has length 32 [2021-08-21 18:56:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:49,145 INFO L470 AbstractCegarLoop]: Abstraction has 6739 states and 17533 transitions. [2021-08-21 18:56:49,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6739 states and 17533 transitions. [2021-08-21 18:56:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:49,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:49,154 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:49,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-08-21 18:56:49,155 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:49,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2135196535, now seen corresponding path program 5 times [2021-08-21 18:56:49,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:49,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703871677] [2021-08-21 18:56:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:49,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:49,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:49,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703871677] [2021-08-21 18:56:49,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703871677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:49,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213485999] [2021-08-21 18:56:49,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:56:49,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:49,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:49,216 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:49,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 18:56:51,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:56:51,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:51,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:52,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213485999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:52,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:52,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:52,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905922055] [2021-08-21 18:56:52,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:52,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:52,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:52,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:52,050 INFO L87 Difference]: Start difference. First operand 6739 states and 17533 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:52,147 INFO L93 Difference]: Finished difference Result 7804 states and 19580 transitions. [2021-08-21 18:56:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:52,158 INFO L225 Difference]: With dead ends: 7804 [2021-08-21 18:56:52,158 INFO L226 Difference]: Without dead ends: 7797 [2021-08-21 18:56:52,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2021-08-21 18:56:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 6794. [2021-08-21 18:56:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6794 states, 6793 states have (on average 2.602237597526866) internal successors, (17677), 6793 states have internal predecessors, (17677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6794 states to 6794 states and 17677 transitions. [2021-08-21 18:56:52,253 INFO L78 Accepts]: Start accepts. Automaton has 6794 states and 17677 transitions. Word has length 32 [2021-08-21 18:56:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:52,253 INFO L470 AbstractCegarLoop]: Abstraction has 6794 states and 17677 transitions. [2021-08-21 18:56:52,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:52,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6794 states and 17677 transitions. [2021-08-21 18:56:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:52,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:52,262 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:52,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-21 18:56:52,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:52,463 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:52,463 INFO L82 PathProgramCache]: Analyzing trace with hash -169360507, now seen corresponding path program 9 times [2021-08-21 18:56:52,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:52,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031298914] [2021-08-21 18:56:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:52,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:52,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:52,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031298914] [2021-08-21 18:56:52,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031298914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:52,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548798440] [2021-08-21 18:56:52,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:56:52,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:52,523 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:52,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 18:56:55,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:56:55,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:55,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:55,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548798440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:55,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:55,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:55,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674792706] [2021-08-21 18:56:55,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:55,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:55,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:55,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:55,478 INFO L87 Difference]: Start difference. First operand 6794 states and 17677 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:55,570 INFO L93 Difference]: Finished difference Result 7873 states and 19753 transitions. [2021-08-21 18:56:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:55,582 INFO L225 Difference]: With dead ends: 7873 [2021-08-21 18:56:55,582 INFO L226 Difference]: Without dead ends: 7866 [2021-08-21 18:56:55,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7866 states. [2021-08-21 18:56:55,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7866 to 6857. [2021-08-21 18:56:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6857 states, 6856 states have (on average 2.5996207701283547) internal successors, (17823), 6856 states have internal predecessors, (17823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6857 states to 6857 states and 17823 transitions. [2021-08-21 18:56:55,673 INFO L78 Accepts]: Start accepts. Automaton has 6857 states and 17823 transitions. Word has length 32 [2021-08-21 18:56:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:55,673 INFO L470 AbstractCegarLoop]: Abstraction has 6857 states and 17823 transitions. [2021-08-21 18:56:55,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6857 states and 17823 transitions. [2021-08-21 18:56:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:55,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:55,685 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:55,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-21 18:56:55,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:55,885 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1796475521, now seen corresponding path program 2 times [2021-08-21 18:56:55,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:55,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938352887] [2021-08-21 18:56:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:55,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:55,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:55,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938352887] [2021-08-21 18:56:55,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938352887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:55,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092180047] [2021-08-21 18:56:55,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:55,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:55,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:55,984 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:55,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 18:56:58,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:56:58,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:56:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:56:58,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:56:58,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:58,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092180047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:58,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:56:58,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:56:58,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191586736] [2021-08-21 18:56:58,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:56:58,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:56:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:56:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:58,842 INFO L87 Difference]: Start difference. First operand 6857 states and 17823 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:56:58,932 INFO L93 Difference]: Finished difference Result 7804 states and 19631 transitions. [2021-08-21 18:56:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:56:58,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:56:58,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:56:58,943 INFO L225 Difference]: With dead ends: 7804 [2021-08-21 18:56:58,944 INFO L226 Difference]: Without dead ends: 7797 [2021-08-21 18:56:58,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:56:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2021-08-21 18:56:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 6878. [2021-08-21 18:56:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6878 states, 6877 states have (on average 2.6017158644757887) internal successors, (17892), 6877 states have internal predecessors, (17892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6878 states to 6878 states and 17892 transitions. [2021-08-21 18:56:59,026 INFO L78 Accepts]: Start accepts. Automaton has 6878 states and 17892 transitions. Word has length 32 [2021-08-21 18:56:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:56:59,026 INFO L470 AbstractCegarLoop]: Abstraction has 6878 states and 17892 transitions. [2021-08-21 18:56:59,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:56:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6878 states and 17892 transitions. [2021-08-21 18:56:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:56:59,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:56:59,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:56:59,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-21 18:56:59,235 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,SelfDestructingSolverStorable210 [2021-08-21 18:56:59,235 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:56:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:56:59,236 INFO L82 PathProgramCache]: Analyzing trace with hash -532655747, now seen corresponding path program 2 times [2021-08-21 18:56:59,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:56:59,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089959661] [2021-08-21 18:56:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:56:59,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:56:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:56:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:56:59,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:56:59,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089959661] [2021-08-21 18:56:59,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089959661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:56:59,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673308696] [2021-08-21 18:56:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:56:59,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:56:59,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:56:59,296 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:56:59,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 18:57:02,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:02,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:02,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:02,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:02,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673308696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:02,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:02,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:02,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972348522] [2021-08-21 18:57:02,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:02,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:02,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:02,234 INFO L87 Difference]: Start difference. First operand 6878 states and 17892 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:02,322 INFO L93 Difference]: Finished difference Result 7891 states and 19839 transitions. [2021-08-21 18:57:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:02,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:02,333 INFO L225 Difference]: With dead ends: 7891 [2021-08-21 18:57:02,333 INFO L226 Difference]: Without dead ends: 7884 [2021-08-21 18:57:02,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7884 states. [2021-08-21 18:57:02,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7884 to 6912. [2021-08-21 18:57:02,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6912 states, 6911 states have (on average 2.6012154536246563) internal successors, (17977), 6911 states have internal predecessors, (17977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6912 states to 6912 states and 17977 transitions. [2021-08-21 18:57:02,423 INFO L78 Accepts]: Start accepts. Automaton has 6912 states and 17977 transitions. Word has length 32 [2021-08-21 18:57:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:02,423 INFO L470 AbstractCegarLoop]: Abstraction has 6912 states and 17977 transitions. [2021-08-21 18:57:02,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6912 states and 17977 transitions. [2021-08-21 18:57:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:02,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:02,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:02,457 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 18:57:02,633 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,SelfDestructingSolverStorable211 [2021-08-21 18:57:02,633 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1278489027, now seen corresponding path program 3 times [2021-08-21 18:57:02,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:02,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884970661] [2021-08-21 18:57:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:02,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:02,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:02,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884970661] [2021-08-21 18:57:02,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884970661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:02,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774579895] [2021-08-21 18:57:02,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:02,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:02,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:02,693 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:02,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 18:57:05,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:05,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:05,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:05,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774579895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:05,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:05,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:05,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032357226] [2021-08-21 18:57:05,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:05,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:05,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:05,548 INFO L87 Difference]: Start difference. First operand 6912 states and 17977 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:05,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:05,640 INFO L93 Difference]: Finished difference Result 7904 states and 19885 transitions. [2021-08-21 18:57:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:05,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:05,651 INFO L225 Difference]: With dead ends: 7904 [2021-08-21 18:57:05,651 INFO L226 Difference]: Without dead ends: 7897 [2021-08-21 18:57:05,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7897 states. [2021-08-21 18:57:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7897 to 6929. [2021-08-21 18:57:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6929 states, 6928 states have (on average 2.603204387990762) internal successors, (18035), 6928 states have internal predecessors, (18035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6929 states to 6929 states and 18035 transitions. [2021-08-21 18:57:05,736 INFO L78 Accepts]: Start accepts. Automaton has 6929 states and 18035 transitions. Word has length 32 [2021-08-21 18:57:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:05,736 INFO L470 AbstractCegarLoop]: Abstraction has 6929 states and 18035 transitions. [2021-08-21 18:57:05,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 6929 states and 18035 transitions. [2021-08-21 18:57:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:05,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:05,745 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:05,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-08-21 18:57:05,945 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,SelfDestructingSolverStorable212 [2021-08-21 18:57:05,946 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:05,946 INFO L82 PathProgramCache]: Analyzing trace with hash 434952593, now seen corresponding path program 3 times [2021-08-21 18:57:05,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:05,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191906367] [2021-08-21 18:57:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:05,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:06,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:06,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191906367] [2021-08-21 18:57:06,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191906367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:06,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44054789] [2021-08-21 18:57:06,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:06,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:06,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:06,007 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:06,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 18:57:08,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:08,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:08,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:08,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:08,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44054789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:08,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:08,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:08,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821327279] [2021-08-21 18:57:08,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:08,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:08,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:08,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:08,917 INFO L87 Difference]: Start difference. First operand 6929 states and 18035 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:09,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:09,008 INFO L93 Difference]: Finished difference Result 7989 states and 20045 transitions. [2021-08-21 18:57:09,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:09,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:09,019 INFO L225 Difference]: With dead ends: 7989 [2021-08-21 18:57:09,019 INFO L226 Difference]: Without dead ends: 7978 [2021-08-21 18:57:09,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7978 states. [2021-08-21 18:57:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7978 to 6940. [2021-08-21 18:57:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6940 states, 6939 states have (on average 2.6002305807753276) internal successors, (18043), 6939 states have internal predecessors, (18043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6940 states to 6940 states and 18043 transitions. [2021-08-21 18:57:09,101 INFO L78 Accepts]: Start accepts. Automaton has 6940 states and 18043 transitions. Word has length 32 [2021-08-21 18:57:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:09,101 INFO L470 AbstractCegarLoop]: Abstraction has 6940 states and 18043 transitions. [2021-08-21 18:57:09,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 6940 states and 18043 transitions. [2021-08-21 18:57:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:09,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:09,110 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:09,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-21 18:57:09,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-21 18:57:09,313 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:09,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:09,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1324423023, now seen corresponding path program 10 times [2021-08-21 18:57:09,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:09,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120763985] [2021-08-21 18:57:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:09,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:09,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:09,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120763985] [2021-08-21 18:57:09,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120763985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:09,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459140215] [2021-08-21 18:57:09,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:09,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:09,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:09,384 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:09,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 18:57:12,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:12,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:12,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:12,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:12,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459140215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:12,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:12,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:12,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527964513] [2021-08-21 18:57:12,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:12,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:12,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:12,291 INFO L87 Difference]: Start difference. First operand 6940 states and 18043 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:12,384 INFO L93 Difference]: Finished difference Result 7976 states and 19978 transitions. [2021-08-21 18:57:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:12,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:12,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:12,397 INFO L225 Difference]: With dead ends: 7976 [2021-08-21 18:57:12,397 INFO L226 Difference]: Without dead ends: 7969 [2021-08-21 18:57:12,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7969 states. [2021-08-21 18:57:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7969 to 6968. [2021-08-21 18:57:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6968 states, 6967 states have (on average 2.595234677766614) internal successors, (18081), 6967 states have internal predecessors, (18081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6968 states to 6968 states and 18081 transitions. [2021-08-21 18:57:12,490 INFO L78 Accepts]: Start accepts. Automaton has 6968 states and 18081 transitions. Word has length 32 [2021-08-21 18:57:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:12,491 INFO L470 AbstractCegarLoop]: Abstraction has 6968 states and 18081 transitions. [2021-08-21 18:57:12,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6968 states and 18081 transitions. [2021-08-21 18:57:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:12,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:12,500 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:12,526 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 18:57:12,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-08-21 18:57:12,700 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:12,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1900554633, now seen corresponding path program 6 times [2021-08-21 18:57:12,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:12,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628674761] [2021-08-21 18:57:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:12,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:12,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:12,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628674761] [2021-08-21 18:57:12,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628674761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:12,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112524582] [2021-08-21 18:57:12,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:12,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:12,761 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:57:12,761 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 18:57:15,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:57:15,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:15,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:15,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112524582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:15,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:15,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:15,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395513743] [2021-08-21 18:57:15,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:15,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:15,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:15,726 INFO L87 Difference]: Start difference. First operand 6968 states and 18081 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:15,830 INFO L93 Difference]: Finished difference Result 7834 states and 19744 transitions. [2021-08-21 18:57:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:15,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:15,843 INFO L225 Difference]: With dead ends: 7834 [2021-08-21 18:57:15,843 INFO L226 Difference]: Without dead ends: 7827 [2021-08-21 18:57:15,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7827 states. [2021-08-21 18:57:15,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7827 to 6980. [2021-08-21 18:57:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6980 states, 6979 states have (on average 2.5942112050437025) internal successors, (18105), 6979 states have internal predecessors, (18105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6980 states to 6980 states and 18105 transitions. [2021-08-21 18:57:15,956 INFO L78 Accepts]: Start accepts. Automaton has 6980 states and 18105 transitions. Word has length 32 [2021-08-21 18:57:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:15,956 INFO L470 AbstractCegarLoop]: Abstraction has 6980 states and 18105 transitions. [2021-08-21 18:57:15,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 6980 states and 18105 transitions. [2021-08-21 18:57:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:15,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:15,965 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:15,991 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 18:57:16,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-08-21 18:57:16,166 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:16,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:16,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1489015429, now seen corresponding path program 11 times [2021-08-21 18:57:16,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:16,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050715644] [2021-08-21 18:57:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:16,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:16,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:16,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050715644] [2021-08-21 18:57:16,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050715644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:16,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019672126] [2021-08-21 18:57:16,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:16,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:16,233 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 18:57:16,233 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 18:57:19,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:57:19,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:19,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019672126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:19,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:19,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:19,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999786181] [2021-08-21 18:57:19,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:19,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:19,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:19,194 INFO L87 Difference]: Start difference. First operand 6980 states and 18105 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:19,288 INFO L93 Difference]: Finished difference Result 7863 states and 19796 transitions. [2021-08-21 18:57:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:19,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:19,300 INFO L225 Difference]: With dead ends: 7863 [2021-08-21 18:57:19,300 INFO L226 Difference]: Without dead ends: 7856 [2021-08-21 18:57:19,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7856 states. [2021-08-21 18:57:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7856 to 6996. [2021-08-21 18:57:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.5922802001429592) internal successors, (18133), 6995 states have internal predecessors, (18133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 18133 transitions. [2021-08-21 18:57:19,386 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 18133 transitions. Word has length 32 [2021-08-21 18:57:19,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:19,386 INFO L470 AbstractCegarLoop]: Abstraction has 6996 states and 18133 transitions. [2021-08-21 18:57:19,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 18133 transitions. [2021-08-21 18:57:19,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:19,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:19,395 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:19,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-21 18:57:19,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-08-21 18:57:19,596 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash 421225609, now seen corresponding path program 8 times [2021-08-21 18:57:19,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:19,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740461203] [2021-08-21 18:57:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:19,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:19,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:19,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740461203] [2021-08-21 18:57:19,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740461203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:19,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723500043] [2021-08-21 18:57:19,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:19,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:19,692 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 18:57:19,697 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 18:57:22,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:22,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:22,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:22,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723500043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:22,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:22,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:22,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39725396] [2021-08-21 18:57:22,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:22,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:22,631 INFO L87 Difference]: Start difference. First operand 6996 states and 18133 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:22,713 INFO L93 Difference]: Finished difference Result 7951 states and 20004 transitions. [2021-08-21 18:57:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:22,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:22,726 INFO L225 Difference]: With dead ends: 7951 [2021-08-21 18:57:22,727 INFO L226 Difference]: Without dead ends: 7944 [2021-08-21 18:57:22,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7944 states. [2021-08-21 18:57:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7944 to 7030. [2021-08-21 18:57:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7030 states, 7029 states have (on average 2.5932565087494663) internal successors, (18228), 7029 states have internal predecessors, (18228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7030 states to 7030 states and 18228 transitions. [2021-08-21 18:57:22,827 INFO L78 Accepts]: Start accepts. Automaton has 7030 states and 18228 transitions. Word has length 32 [2021-08-21 18:57:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:22,828 INFO L470 AbstractCegarLoop]: Abstraction has 7030 states and 18228 transitions. [2021-08-21 18:57:22,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 7030 states and 18228 transitions. [2021-08-21 18:57:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:22,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:22,838 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:22,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-21 18:57:23,038 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,SelfDestructingSolverStorable217 [2021-08-21 18:57:23,038 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash -357695339, now seen corresponding path program 9 times [2021-08-21 18:57:23,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:23,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869779692] [2021-08-21 18:57:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:23,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:23,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:23,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869779692] [2021-08-21 18:57:23,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869779692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:23,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122314324] [2021-08-21 18:57:23,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:23,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:23,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:23,105 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 18:57:23,136 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 18:57:26,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:26,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:26,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122314324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:26,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:26,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:26,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774197452] [2021-08-21 18:57:26,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:26,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:26,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:26,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:26,172 INFO L87 Difference]: Start difference. First operand 7030 states and 18228 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:26,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:26,259 INFO L93 Difference]: Finished difference Result 7887 states and 19853 transitions. [2021-08-21 18:57:26,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:26,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:26,273 INFO L225 Difference]: With dead ends: 7887 [2021-08-21 18:57:26,273 INFO L226 Difference]: Without dead ends: 7880 [2021-08-21 18:57:26,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:26,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7880 states. [2021-08-21 18:57:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7880 to 7046. [2021-08-21 18:57:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7045 states have (on average 2.59361249112846) internal successors, (18272), 7045 states have internal predecessors, (18272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 18272 transitions. [2021-08-21 18:57:26,381 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 18272 transitions. Word has length 32 [2021-08-21 18:57:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:26,381 INFO L470 AbstractCegarLoop]: Abstraction has 7046 states and 18272 transitions. [2021-08-21 18:57:26,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 18272 transitions. [2021-08-21 18:57:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:26,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:26,391 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] [2021-08-21 18:57:26,417 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 18:57:26,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:26,591 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2081791675, now seen corresponding path program 3 times [2021-08-21 18:57:26,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:26,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074164670] [2021-08-21 18:57:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:26,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:26,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:26,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074164670] [2021-08-21 18:57:26,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074164670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:26,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129482248] [2021-08-21 18:57:26,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:26,652 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:26,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:26,653 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 18:57:26,653 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 18:57:29,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:29,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:29,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:29,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:29,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129482248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:29,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:29,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:29,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455986736] [2021-08-21 18:57:29,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:29,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:29,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:29,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:29,676 INFO L87 Difference]: Start difference. First operand 7046 states and 18272 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:29,757 INFO L93 Difference]: Finished difference Result 7989 states and 20078 transitions. [2021-08-21 18:57:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:29,769 INFO L225 Difference]: With dead ends: 7989 [2021-08-21 18:57:29,769 INFO L226 Difference]: Without dead ends: 7982 [2021-08-21 18:57:29,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7982 states. [2021-08-21 18:57:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7982 to 7089. [2021-08-21 18:57:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7088 states have (on average 2.5946670428893905) internal successors, (18391), 7088 states have internal predecessors, (18391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 18391 transitions. [2021-08-21 18:57:29,858 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 18391 transitions. Word has length 32 [2021-08-21 18:57:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:29,858 INFO L470 AbstractCegarLoop]: Abstraction has 7089 states and 18391 transitions. [2021-08-21 18:57:29,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 18391 transitions. [2021-08-21 18:57:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:29,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:29,868 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:29,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-21 18:57:30,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:30,068 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash -368350055, now seen corresponding path program 10 times [2021-08-21 18:57:30,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:30,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563016488] [2021-08-21 18:57:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:30,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:30,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:30,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563016488] [2021-08-21 18:57:30,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563016488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:30,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50524741] [2021-08-21 18:57:30,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:30,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:30,162 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 18:57:30,163 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 18:57:33,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:33,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:33,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:33,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50524741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:33,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:33,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:33,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153435530] [2021-08-21 18:57:33,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:33,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:33,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:33,304 INFO L87 Difference]: Start difference. First operand 7089 states and 18391 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:33,377 INFO L93 Difference]: Finished difference Result 8094 states and 20303 transitions. [2021-08-21 18:57:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:33,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:33,389 INFO L225 Difference]: With dead ends: 8094 [2021-08-21 18:57:33,389 INFO L226 Difference]: Without dead ends: 8083 [2021-08-21 18:57:33,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:33,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8083 states. [2021-08-21 18:57:33,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8083 to 7120. [2021-08-21 18:57:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7120 states, 7119 states have (on average 2.591234723978087) internal successors, (18447), 7119 states have internal predecessors, (18447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7120 states to 7120 states and 18447 transitions. [2021-08-21 18:57:33,473 INFO L78 Accepts]: Start accepts. Automaton has 7120 states and 18447 transitions. Word has length 32 [2021-08-21 18:57:33,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:33,473 INFO L470 AbstractCegarLoop]: Abstraction has 7120 states and 18447 transitions. [2021-08-21 18:57:33,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7120 states and 18447 transitions. [2021-08-21 18:57:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:33,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:33,482 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] [2021-08-21 18:57:33,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2021-08-21 18:57:33,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:33,683 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:33,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2127725671, now seen corresponding path program 3 times [2021-08-21 18:57:33,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:33,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598160692] [2021-08-21 18:57:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:33,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:33,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:33,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598160692] [2021-08-21 18:57:33,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598160692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:33,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272634529] [2021-08-21 18:57:33,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:33,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:33,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:33,744 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 18:57:33,744 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 18:57:36,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:57:36,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:36,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:36,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272634529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:36,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:36,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:36,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769711427] [2021-08-21 18:57:36,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:36,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:36,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:36,769 INFO L87 Difference]: Start difference. First operand 7120 states and 18447 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:36,855 INFO L93 Difference]: Finished difference Result 8104 states and 20258 transitions. [2021-08-21 18:57:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:36,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:36,867 INFO L225 Difference]: With dead ends: 8104 [2021-08-21 18:57:36,867 INFO L226 Difference]: Without dead ends: 8097 [2021-08-21 18:57:36,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8097 states. [2021-08-21 18:57:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8097 to 7139. [2021-08-21 18:57:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7139 states, 7138 states have (on average 2.591202017371813) internal successors, (18496), 7138 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7139 states to 7139 states and 18496 transitions. [2021-08-21 18:57:36,986 INFO L78 Accepts]: Start accepts. Automaton has 7139 states and 18496 transitions. Word has length 32 [2021-08-21 18:57:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:36,986 INFO L470 AbstractCegarLoop]: Abstraction has 7139 states and 18496 transitions. [2021-08-21 18:57:36,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:36,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7139 states and 18496 transitions. [2021-08-21 18:57:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:36,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:36,996 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:37,022 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 18:57:37,196 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,SelfDestructingSolverStorable221 [2021-08-21 18:57:37,196 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1125073667, now seen corresponding path program 5 times [2021-08-21 18:57:37,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:37,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108439393] [2021-08-21 18:57:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:37,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:37,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108439393] [2021-08-21 18:57:37,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108439393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399249800] [2021-08-21 18:57:37,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:37,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:37,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:37,258 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 18:57:37,258 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 18:57:40,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:57:40,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:40,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:40,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:40,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399249800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:40,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:40,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:40,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32964974] [2021-08-21 18:57:40,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:40,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:40,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:40,358 INFO L87 Difference]: Start difference. First operand 7139 states and 18496 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:40,459 INFO L93 Difference]: Finished difference Result 8044 states and 20310 transitions. [2021-08-21 18:57:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:40,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:40,473 INFO L225 Difference]: With dead ends: 8044 [2021-08-21 18:57:40,473 INFO L226 Difference]: Without dead ends: 8037 [2021-08-21 18:57:40,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-08-21 18:57:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7165. [2021-08-21 18:57:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7165 states, 7164 states have (on average 2.5928252372975993) internal successors, (18575), 7164 states have internal predecessors, (18575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7165 states to 7165 states and 18575 transitions. [2021-08-21 18:57:40,573 INFO L78 Accepts]: Start accepts. Automaton has 7165 states and 18575 transitions. Word has length 32 [2021-08-21 18:57:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:40,573 INFO L470 AbstractCegarLoop]: Abstraction has 7165 states and 18575 transitions. [2021-08-21 18:57:40,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7165 states and 18575 transitions. [2021-08-21 18:57:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:40,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:40,583 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:40,609 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 18:57:40,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:40,784 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:40,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1055221905, now seen corresponding path program 6 times [2021-08-21 18:57:40,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:40,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444117797] [2021-08-21 18:57:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:40,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:40,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:40,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444117797] [2021-08-21 18:57:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444117797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:40,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519611702] [2021-08-21 18:57:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:57:40,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:40,846 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 18:57:40,846 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 18:57:43,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:57:43,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:43,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:43,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519611702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:43,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:43,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:43,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696882223] [2021-08-21 18:57:43,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:43,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:43,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:43,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:43,894 INFO L87 Difference]: Start difference. First operand 7165 states and 18575 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:43,986 INFO L93 Difference]: Finished difference Result 7995 states and 20181 transitions. [2021-08-21 18:57:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:43,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:43,998 INFO L225 Difference]: With dead ends: 7995 [2021-08-21 18:57:43,998 INFO L226 Difference]: Without dead ends: 7988 [2021-08-21 18:57:43,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7988 states. [2021-08-21 18:57:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7988 to 7173. [2021-08-21 18:57:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 2.5927216954824317) internal successors, (18595), 7172 states have internal predecessors, (18595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 18595 transitions. [2021-08-21 18:57:44,087 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 18595 transitions. Word has length 32 [2021-08-21 18:57:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:44,087 INFO L470 AbstractCegarLoop]: Abstraction has 7173 states and 18595 transitions. [2021-08-21 18:57:44,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 18595 transitions. [2021-08-21 18:57:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:44,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:44,097 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:44,123 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 18:57:44,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-21 18:57:44,298 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:44,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:44,299 INFO L82 PathProgramCache]: Analyzing trace with hash -997887103, now seen corresponding path program 8 times [2021-08-21 18:57:44,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:44,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533850639] [2021-08-21 18:57:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:44,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:44,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:44,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533850639] [2021-08-21 18:57:44,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533850639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:44,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695569383] [2021-08-21 18:57:44,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:57:44,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:44,375 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 18:57:44,411 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 18:57:47,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:57:47,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:47,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:47,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695569383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:47,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:47,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:47,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318629864] [2021-08-21 18:57:47,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:47,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:47,519 INFO L87 Difference]: Start difference. First operand 7173 states and 18595 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:47,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:47,606 INFO L93 Difference]: Finished difference Result 8066 states and 20364 transitions. [2021-08-21 18:57:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:47,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:47,621 INFO L225 Difference]: With dead ends: 8066 [2021-08-21 18:57:47,621 INFO L226 Difference]: Without dead ends: 8059 [2021-08-21 18:57:47,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-08-21 18:57:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 7181. [2021-08-21 18:57:47,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7181 states, 7180 states have (on average 2.5926183844011144) internal successors, (18615), 7180 states have internal predecessors, (18615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7181 states to 7181 states and 18615 transitions. [2021-08-21 18:57:47,724 INFO L78 Accepts]: Start accepts. Automaton has 7181 states and 18615 transitions. Word has length 32 [2021-08-21 18:57:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:47,724 INFO L470 AbstractCegarLoop]: Abstraction has 7181 states and 18615 transitions. [2021-08-21 18:57:47,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 7181 states and 18615 transitions. [2021-08-21 18:57:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:47,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:47,733 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:47,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2021-08-21 18:57:47,933 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,SelfDestructingSolverStorable224 [2021-08-21 18:57:47,933 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1776808051, now seen corresponding path program 9 times [2021-08-21 18:57:47,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:47,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901845453] [2021-08-21 18:57:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:47,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:47,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:47,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901845453] [2021-08-21 18:57:47,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901845453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:47,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87170254] [2021-08-21 18:57:47,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:47,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:47,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:47,995 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 18:57:47,995 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 18:57:50,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:57:50,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:50,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:50,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:51,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87170254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:51,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:51,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:51,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550146871] [2021-08-21 18:57:51,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:51,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:51,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:51,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:51,016 INFO L87 Difference]: Start difference. First operand 7181 states and 18615 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:51,104 INFO L93 Difference]: Finished difference Result 8017 states and 20233 transitions. [2021-08-21 18:57:51,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:51,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:51,117 INFO L225 Difference]: With dead ends: 8017 [2021-08-21 18:57:51,117 INFO L226 Difference]: Without dead ends: 8010 [2021-08-21 18:57:51,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2021-08-21 18:57:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 7189. [2021-08-21 18:57:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7189 states, 7188 states have (on average 2.5925153032832498) internal successors, (18635), 7188 states have internal predecessors, (18635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7189 states to 7189 states and 18635 transitions. [2021-08-21 18:57:51,270 INFO L78 Accepts]: Start accepts. Automaton has 7189 states and 18635 transitions. Word has length 32 [2021-08-21 18:57:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:51,270 INFO L470 AbstractCegarLoop]: Abstraction has 7189 states and 18635 transitions. [2021-08-21 18:57:51,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:51,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7189 states and 18635 transitions. [2021-08-21 18:57:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:51,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:51,282 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:51,308 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 18:57:51,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-08-21 18:57:51,482 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1252260231, now seen corresponding path program 4 times [2021-08-21 18:57:51,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:51,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172041061] [2021-08-21 18:57:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:51,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:51,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:51,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172041061] [2021-08-21 18:57:51,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172041061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:51,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044997751] [2021-08-21 18:57:51,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:57:51,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:51,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:51,543 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 18:57:51,543 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 18:57:54,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:57:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:54,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:54,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044997751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:54,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:54,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:54,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72247576] [2021-08-21 18:57:54,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:54,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:54,586 INFO L87 Difference]: Start difference. First operand 7189 states and 18635 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:54,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:54,680 INFO L93 Difference]: Finished difference Result 8083 states and 20388 transitions. [2021-08-21 18:57:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:54,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:54,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:54,692 INFO L225 Difference]: With dead ends: 8083 [2021-08-21 18:57:54,693 INFO L226 Difference]: Without dead ends: 8076 [2021-08-21 18:57:54,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-08-21 18:57:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 7197. [2021-08-21 18:57:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 2.592412451361868) internal successors, (18655), 7196 states have internal predecessors, (18655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 18655 transitions. [2021-08-21 18:57:54,784 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 18655 transitions. Word has length 32 [2021-08-21 18:57:54,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:54,784 INFO L470 AbstractCegarLoop]: Abstraction has 7197 states and 18655 transitions. [2021-08-21 18:57:54,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:54,784 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 18655 transitions. [2021-08-21 18:57:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:54,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:54,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:54,818 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 18:57:54,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:54,993 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash -407715435, now seen corresponding path program 5 times [2021-08-21 18:57:54,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:54,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781695033] [2021-08-21 18:57:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:54,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:55,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:55,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781695033] [2021-08-21 18:57:55,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781695033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:55,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549320359] [2021-08-21 18:57:55,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:57:55,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:55,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:55,061 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 18:57:55,061 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 18:57:58,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:57:58,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:57:58,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:57:58,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:57:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:57:58,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549320359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:58,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:57:58,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:57:58,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481848545] [2021-08-21 18:57:58,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:57:58,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:57:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:57:58,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:58,183 INFO L87 Difference]: Start difference. First operand 7197 states and 18655 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:58,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:57:58,284 INFO L93 Difference]: Finished difference Result 8034 states and 20261 transitions. [2021-08-21 18:57:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:57:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:57:58,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:57:58,298 INFO L225 Difference]: With dead ends: 8034 [2021-08-21 18:57:58,298 INFO L226 Difference]: Without dead ends: 8027 [2021-08-21 18:57:58,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:57:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-08-21 18:57:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 7205. [2021-08-21 18:57:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7205 states, 7204 states have (on average 2.592309827873404) internal successors, (18675), 7204 states have internal predecessors, (18675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 18675 transitions. [2021-08-21 18:57:58,390 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 18675 transitions. Word has length 32 [2021-08-21 18:57:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:57:58,390 INFO L470 AbstractCegarLoop]: Abstraction has 7205 states and 18675 transitions. [2021-08-21 18:57:58,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:57:58,391 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 18675 transitions. [2021-08-21 18:57:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:57:58,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:57:58,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:57:58,425 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 18:57:58,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:58,601 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:57:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:57:58,601 INFO L82 PathProgramCache]: Analyzing trace with hash -643780275, now seen corresponding path program 3 times [2021-08-21 18:57:58,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:57:58,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326904544] [2021-08-21 18:57:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:57:58,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:57:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:57:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:57:58,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:57:58,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326904544] [2021-08-21 18:57:58,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326904544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:57:58,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531662725] [2021-08-21 18:57:58,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:57:58,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:57:58,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:57:58,661 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 18:57:58,661 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 18:58:01,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:58:01,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:01,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:01,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531662725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:01,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:01,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:01,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669147508] [2021-08-21 18:58:01,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:01,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:01,843 INFO L87 Difference]: Start difference. First operand 7205 states and 18675 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:01,926 INFO L93 Difference]: Finished difference Result 8156 states and 20529 transitions. [2021-08-21 18:58:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:01,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:01,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:01,938 INFO L225 Difference]: With dead ends: 8156 [2021-08-21 18:58:01,938 INFO L226 Difference]: Without dead ends: 8149 [2021-08-21 18:58:01,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:01,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2021-08-21 18:58:02,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 7222. [2021-08-21 18:58:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7222 states, 7221 states have (on average 2.5942390250657805) internal successors, (18733), 7221 states have internal predecessors, (18733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7222 states to 7222 states and 18733 transitions. [2021-08-21 18:58:02,025 INFO L78 Accepts]: Start accepts. Automaton has 7222 states and 18733 transitions. Word has length 32 [2021-08-21 18:58:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:02,025 INFO L470 AbstractCegarLoop]: Abstraction has 7222 states and 18733 transitions. [2021-08-21 18:58:02,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 7222 states and 18733 transitions. [2021-08-21 18:58:02,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:02,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:02,035 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:02,061 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 18:58:02,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:02,237 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:02,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1069661345, now seen corresponding path program 10 times [2021-08-21 18:58:02,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:02,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608505186] [2021-08-21 18:58:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:02,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:02,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:02,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608505186] [2021-08-21 18:58:02,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608505186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:02,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735255888] [2021-08-21 18:58:02,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:02,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:02,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:02,298 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 18:58:02,299 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 18:58:05,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:05,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:05,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735255888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:05,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:05,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:05,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325798844] [2021-08-21 18:58:05,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:05,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:05,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:05,411 INFO L87 Difference]: Start difference. First operand 7222 states and 18733 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:05,490 INFO L93 Difference]: Finished difference Result 8246 states and 20691 transitions. [2021-08-21 18:58:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:05,502 INFO L225 Difference]: With dead ends: 8246 [2021-08-21 18:58:05,502 INFO L226 Difference]: Without dead ends: 8235 [2021-08-21 18:58:05,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8235 states. [2021-08-21 18:58:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8235 to 7233. [2021-08-21 18:58:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7233 states, 7232 states have (on average 2.5913993362831858) internal successors, (18741), 7232 states have internal predecessors, (18741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7233 states to 7233 states and 18741 transitions. [2021-08-21 18:58:05,595 INFO L78 Accepts]: Start accepts. Automaton has 7233 states and 18741 transitions. Word has length 32 [2021-08-21 18:58:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:05,595 INFO L470 AbstractCegarLoop]: Abstraction has 7233 states and 18741 transitions. [2021-08-21 18:58:05,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 7233 states and 18741 transitions. [2021-08-21 18:58:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:05,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:05,605 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 18:58:05,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2021-08-21 18:58:05,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:05,805 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:05,806 INFO L82 PathProgramCache]: Analyzing trace with hash -689714271, now seen corresponding path program 6 times [2021-08-21 18:58:05,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:05,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723212114] [2021-08-21 18:58:05,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:05,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:05,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:05,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723212114] [2021-08-21 18:58:05,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723212114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:05,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163808144] [2021-08-21 18:58:05,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:58:05,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:05,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:05,867 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 18:58:05,867 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 18:58:08,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:58:08,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:08,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:08,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:09,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163808144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:09,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:09,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:09,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844241037] [2021-08-21 18:58:09,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:09,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:09,035 INFO L87 Difference]: Start difference. First operand 7233 states and 18741 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:09,123 INFO L93 Difference]: Finished difference Result 8206 states and 20572 transitions. [2021-08-21 18:58:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:09,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:09,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:09,135 INFO L225 Difference]: With dead ends: 8206 [2021-08-21 18:58:09,135 INFO L226 Difference]: Without dead ends: 8199 [2021-08-21 18:58:09,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:09,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8199 states. [2021-08-21 18:58:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8199 to 7245. [2021-08-21 18:58:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7245 states, 7244 states have (on average 2.5901435670900055) internal successors, (18763), 7244 states have internal predecessors, (18763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7245 states to 7245 states and 18763 transitions. [2021-08-21 18:58:09,226 INFO L78 Accepts]: Start accepts. Automaton has 7245 states and 18763 transitions. Word has length 32 [2021-08-21 18:58:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:09,226 INFO L470 AbstractCegarLoop]: Abstraction has 7245 states and 18763 transitions. [2021-08-21 18:58:09,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 7245 states and 18763 transitions. [2021-08-21 18:58:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:09,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:09,236 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:09,263 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 18:58:09,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:09,436 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1467115831, now seen corresponding path program 8 times [2021-08-21 18:58:09,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:09,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337474234] [2021-08-21 18:58:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:09,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:09,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:09,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337474234] [2021-08-21 18:58:09,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337474234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:09,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171744080] [2021-08-21 18:58:09,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:09,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:09,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:09,500 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 18:58:09,500 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 18:58:12,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:12,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:12,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:12,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171744080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:12,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:12,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:12,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136667126] [2021-08-21 18:58:12,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:12,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:12,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:12,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:12,671 INFO L87 Difference]: Start difference. First operand 7245 states and 18763 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:12,759 INFO L93 Difference]: Finished difference Result 8139 states and 20507 transitions. [2021-08-21 18:58:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:12,771 INFO L225 Difference]: With dead ends: 8139 [2021-08-21 18:58:12,771 INFO L226 Difference]: Without dead ends: 8132 [2021-08-21 18:58:12,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-08-21 18:58:12,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 7266. [2021-08-21 18:58:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7266 states, 7265 states have (on average 2.5918788713007572) internal successors, (18830), 7265 states have internal predecessors, (18830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7266 states to 7266 states and 18830 transitions. [2021-08-21 18:58:12,859 INFO L78 Accepts]: Start accepts. Automaton has 7266 states and 18830 transitions. Word has length 32 [2021-08-21 18:58:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:12,860 INFO L470 AbstractCegarLoop]: Abstraction has 7266 states and 18830 transitions. [2021-08-21 18:58:12,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 7266 states and 18830 transitions. [2021-08-21 18:58:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:12,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:12,869 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:12,895 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 18:58:13,069 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,SelfDestructingSolverStorable231 [2021-08-21 18:58:13,069 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:13,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:13,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2003342907, now seen corresponding path program 9 times [2021-08-21 18:58:13,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:13,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444180626] [2021-08-21 18:58:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:13,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:13,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:13,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444180626] [2021-08-21 18:58:13,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444180626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:13,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273497152] [2021-08-21 18:58:13,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:13,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:13,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:13,133 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 18:58:13,134 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 18:58:16,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:58:16,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:16,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273497152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:16,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:16,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:16,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763875165] [2021-08-21 18:58:16,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 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 7 interpolants. [2021-08-21 18:58:16,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:16,390 INFO L87 Difference]: Start difference. First operand 7266 states and 18830 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:16,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:16,525 INFO L93 Difference]: Finished difference Result 8086 states and 20378 transitions. [2021-08-21 18:58:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:16,526 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:16,537 INFO L225 Difference]: With dead ends: 8086 [2021-08-21 18:58:16,537 INFO L226 Difference]: Without dead ends: 8079 [2021-08-21 18:58:16,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-08-21 18:58:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7253. [2021-08-21 18:58:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7253 states, 7252 states have (on average 2.589492553778268) internal successors, (18779), 7252 states have internal predecessors, (18779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7253 states to 7253 states and 18779 transitions. [2021-08-21 18:58:16,618 INFO L78 Accepts]: Start accepts. Automaton has 7253 states and 18779 transitions. Word has length 32 [2021-08-21 18:58:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:16,619 INFO L470 AbstractCegarLoop]: Abstraction has 7253 states and 18779 transitions. [2021-08-21 18:58:16,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 7253 states and 18779 transitions. [2021-08-21 18:58:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:16,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:16,628 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:16,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-21 18:58:16,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:16,828 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:16,829 INFO L82 PathProgramCache]: Analyzing trace with hash -291254087, now seen corresponding path program 10 times [2021-08-21 18:58:16,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:16,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836383893] [2021-08-21 18:58:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:16,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:16,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:16,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836383893] [2021-08-21 18:58:16,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836383893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:16,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700013197] [2021-08-21 18:58:16,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:16,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:16,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:16,891 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 18:58:16,891 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 18:58:19,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:19,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:19,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:20,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700013197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:20,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:20,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:20,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260677562] [2021-08-21 18:58:20,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:20,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:20,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:20,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:20,068 INFO L87 Difference]: Start difference. First operand 7253 states and 18779 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:20,147 INFO L93 Difference]: Finished difference Result 8141 states and 20491 transitions. [2021-08-21 18:58:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:20,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:20,159 INFO L225 Difference]: With dead ends: 8141 [2021-08-21 18:58:20,159 INFO L226 Difference]: Without dead ends: 8134 [2021-08-21 18:58:20,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8134 states. [2021-08-21 18:58:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8134 to 7275. [2021-08-21 18:58:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7275 states, 7274 states have (on average 2.5894968380533405) internal successors, (18836), 7274 states have internal predecessors, (18836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7275 states to 7275 states and 18836 transitions. [2021-08-21 18:58:20,246 INFO L78 Accepts]: Start accepts. Automaton has 7275 states and 18836 transitions. Word has length 32 [2021-08-21 18:58:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:20,246 INFO L470 AbstractCegarLoop]: Abstraction has 7275 states and 18836 transitions. [2021-08-21 18:58:20,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7275 states and 18836 transitions. [2021-08-21 18:58:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:20,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:20,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:20,283 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 18:58:20,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-21 18:58:20,457 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:20,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1422187533, now seen corresponding path program 4 times [2021-08-21 18:58:20,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:20,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842225744] [2021-08-21 18:58:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:20,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:20,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:20,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842225744] [2021-08-21 18:58:20,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842225744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:20,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941818717] [2021-08-21 18:58:20,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:20,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:20,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:20,518 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 18:58:20,519 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 18:58:23,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:23,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:23,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:23,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:23,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941818717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:23,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:23,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:23,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879901453] [2021-08-21 18:58:23,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:23,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:23,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:23,783 INFO L87 Difference]: Start difference. First operand 7275 states and 18836 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:23,872 INFO L93 Difference]: Finished difference Result 8203 states and 20609 transitions. [2021-08-21 18:58:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:23,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:23,889 INFO L225 Difference]: With dead ends: 8203 [2021-08-21 18:58:23,889 INFO L226 Difference]: Without dead ends: 8192 [2021-08-21 18:58:23,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8192 states. [2021-08-21 18:58:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8192 to 7270. [2021-08-21 18:58:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7270 states, 7269 states have (on average 2.5877011968633923) internal successors, (18810), 7269 states have internal predecessors, (18810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7270 states to 7270 states and 18810 transitions. [2021-08-21 18:58:24,010 INFO L78 Accepts]: Start accepts. Automaton has 7270 states and 18810 transitions. Word has length 32 [2021-08-21 18:58:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:24,010 INFO L470 AbstractCegarLoop]: Abstraction has 7270 states and 18810 transitions. [2021-08-21 18:58:24,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7270 states and 18810 transitions. [2021-08-21 18:58:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:24,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:24,023 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:24,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-21 18:58:24,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-08-21 18:58:24,223 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:24,224 INFO L82 PathProgramCache]: Analyzing trace with hash -337188083, now seen corresponding path program 3 times [2021-08-21 18:58:24,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:24,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308036714] [2021-08-21 18:58:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:24,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:24,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:24,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308036714] [2021-08-21 18:58:24,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308036714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:24,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401673599] [2021-08-21 18:58:24,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:24,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:24,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:24,289 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 18:58:24,290 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 18:58:27,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:58:27,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:27,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:27,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401673599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:27,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:27,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:27,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375849077] [2021-08-21 18:58:27,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:27,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:27,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:27,570 INFO L87 Difference]: Start difference. First operand 7270 states and 18810 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:27,666 INFO L93 Difference]: Finished difference Result 8172 states and 20459 transitions. [2021-08-21 18:58:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:27,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:27,679 INFO L225 Difference]: With dead ends: 8172 [2021-08-21 18:58:27,679 INFO L226 Difference]: Without dead ends: 8165 [2021-08-21 18:58:27,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8165 states. [2021-08-21 18:58:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8165 to 7243. [2021-08-21 18:58:27,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7243 states, 7242 states have (on average 2.58119304059652) internal successors, (18693), 7242 states have internal predecessors, (18693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7243 states to 7243 states and 18693 transitions. [2021-08-21 18:58:27,771 INFO L78 Accepts]: Start accepts. Automaton has 7243 states and 18693 transitions. Word has length 32 [2021-08-21 18:58:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:27,771 INFO L470 AbstractCegarLoop]: Abstraction has 7243 states and 18693 transitions. [2021-08-21 18:58:27,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7243 states and 18693 transitions. [2021-08-21 18:58:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:27,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:27,781 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:27,807 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 18:58:27,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-21 18:58:27,981 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1067280311, now seen corresponding path program 5 times [2021-08-21 18:58:27,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:27,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850231453] [2021-08-21 18:58:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:27,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:28,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:28,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850231453] [2021-08-21 18:58:28,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850231453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:28,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484366623] [2021-08-21 18:58:28,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:58:28,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:28,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:28,051 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 18:58:28,052 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 18:58:31,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:58:31,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:31,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:31,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:31,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484366623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:31,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:31,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:31,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377506025] [2021-08-21 18:58:31,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:31,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:31,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:31,470 INFO L87 Difference]: Start difference. First operand 7243 states and 18693 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:31,568 INFO L93 Difference]: Finished difference Result 8071 states and 20264 transitions. [2021-08-21 18:58:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:31,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:31,583 INFO L225 Difference]: With dead ends: 8071 [2021-08-21 18:58:31,583 INFO L226 Difference]: Without dead ends: 8064 [2021-08-21 18:58:31,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2021-08-21 18:58:31,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7235. [2021-08-21 18:58:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 2.5804534144318496) internal successors, (18667), 7234 states have internal predecessors, (18667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 18667 transitions. [2021-08-21 18:58:31,687 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 18667 transitions. Word has length 32 [2021-08-21 18:58:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:31,688 INFO L470 AbstractCegarLoop]: Abstraction has 7235 states and 18667 transitions. [2021-08-21 18:58:31,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 18667 transitions. [2021-08-21 18:58:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:31,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:31,698 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] [2021-08-21 18:58:31,727 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 18:58:31,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:31,899 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:31,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:31,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1603507387, now seen corresponding path program 6 times [2021-08-21 18:58:31,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:31,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250528851] [2021-08-21 18:58:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:31,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:31,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:31,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250528851] [2021-08-21 18:58:31,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250528851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:31,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156449869] [2021-08-21 18:58:31,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:58:31,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:31,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:31,966 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 18:58:31,967 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 18:58:35,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:58:35,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:35,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:35,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156449869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:35,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:35,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:35,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328973265] [2021-08-21 18:58:35,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:35,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:35,299 INFO L87 Difference]: Start difference. First operand 7235 states and 18667 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:35,391 INFO L93 Difference]: Finished difference Result 7957 states and 20022 transitions. [2021-08-21 18:58:35,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:35,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:35,409 INFO L225 Difference]: With dead ends: 7957 [2021-08-21 18:58:35,409 INFO L226 Difference]: Without dead ends: 7950 [2021-08-21 18:58:35,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2021-08-21 18:58:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 7217. [2021-08-21 18:58:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7217 states, 7216 states have (on average 2.5756651884700665) internal successors, (18586), 7216 states have internal predecessors, (18586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7217 states to 7217 states and 18586 transitions. [2021-08-21 18:58:35,526 INFO L78 Accepts]: Start accepts. Automaton has 7217 states and 18586 transitions. Word has length 32 [2021-08-21 18:58:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:35,526 INFO L470 AbstractCegarLoop]: Abstraction has 7217 states and 18586 transitions. [2021-08-21 18:58:35,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 7217 states and 18586 transitions. [2021-08-21 18:58:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:35,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:35,539 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:35,567 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 18:58:35,740 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,SelfDestructingSolverStorable237 [2021-08-21 18:58:35,741 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:35,741 INFO L82 PathProgramCache]: Analyzing trace with hash 666741067, now seen corresponding path program 8 times [2021-08-21 18:58:35,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:35,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443397592] [2021-08-21 18:58:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:35,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:35,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:35,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443397592] [2021-08-21 18:58:35,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443397592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:35,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4726950] [2021-08-21 18:58:35,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:58:35,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:35,805 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 18:58:35,806 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 18:58:38,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:58:38,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:38,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:39,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4726950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:39,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106990304] [2021-08-21 18:58:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:39,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:39,151 INFO L87 Difference]: Start difference. First operand 7217 states and 18586 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:39,266 INFO L93 Difference]: Finished difference Result 8104 states and 20319 transitions. [2021-08-21 18:58:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:39,282 INFO L225 Difference]: With dead ends: 8104 [2021-08-21 18:58:39,283 INFO L226 Difference]: Without dead ends: 8097 [2021-08-21 18:58:39,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8097 states. [2021-08-21 18:58:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8097 to 7232. [2021-08-21 18:58:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7232 states, 7231 states have (on average 2.5772368966947865) internal successors, (18636), 7231 states have internal predecessors, (18636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7232 states to 7232 states and 18636 transitions. [2021-08-21 18:58:39,403 INFO L78 Accepts]: Start accepts. Automaton has 7232 states and 18636 transitions. Word has length 32 [2021-08-21 18:58:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:39,403 INFO L470 AbstractCegarLoop]: Abstraction has 7232 states and 18636 transitions. [2021-08-21 18:58:39,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 7232 states and 18636 transitions. [2021-08-21 18:58:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:39,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:39,416 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:39,444 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 18:58:39,616 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,SelfDestructingSolverStorable238 [2021-08-21 18:58:39,616 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:39,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:39,616 INFO L82 PathProgramCache]: Analyzing trace with hash 422666197, now seen corresponding path program 5 times [2021-08-21 18:58:39,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:39,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719814016] [2021-08-21 18:58:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:39,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:39,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:39,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719814016] [2021-08-21 18:58:39,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719814016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:39,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138685868] [2021-08-21 18:58:39,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:58:39,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:39,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:39,683 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 18:58:39,684 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 18:58:42,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:58:42,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:42,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:43,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138685868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:43,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:43,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:43,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45619172] [2021-08-21 18:58:43,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:43,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:43,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:43,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:43,018 INFO L87 Difference]: Start difference. First operand 7232 states and 18636 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:43,111 INFO L93 Difference]: Finished difference Result 8040 states and 20196 transitions. [2021-08-21 18:58:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:43,123 INFO L225 Difference]: With dead ends: 8040 [2021-08-21 18:58:43,123 INFO L226 Difference]: Without dead ends: 8033 [2021-08-21 18:58:43,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8033 states. [2021-08-21 18:58:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8033 to 7236. [2021-08-21 18:58:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 2.5774706288873532) internal successors, (18648), 7235 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:43,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 18648 transitions. [2021-08-21 18:58:43,223 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 18648 transitions. Word has length 32 [2021-08-21 18:58:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:43,223 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 18648 transitions. [2021-08-21 18:58:43,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 18648 transitions. [2021-08-21 18:58:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:43,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:43,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:43,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2021-08-21 18:58:43,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-08-21 18:58:43,433 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1542122935, now seen corresponding path program 6 times [2021-08-21 18:58:43,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:43,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210174640] [2021-08-21 18:58:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:43,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:43,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:43,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210174640] [2021-08-21 18:58:43,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210174640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:43,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143535718] [2021-08-21 18:58:43,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:58:43,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:43,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:43,498 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 18:58:43,499 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 18:58:46,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:58:46,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:46,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:46,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:46,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143535718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:46,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:46,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:46,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798677747] [2021-08-21 18:58:46,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:46,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:46,899 INFO L87 Difference]: Start difference. First operand 7236 states and 18648 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:47,001 INFO L93 Difference]: Finished difference Result 8011 states and 20127 transitions. [2021-08-21 18:58:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:47,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:47,017 INFO L225 Difference]: With dead ends: 8011 [2021-08-21 18:58:47,017 INFO L226 Difference]: Without dead ends: 8004 [2021-08-21 18:58:47,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:47,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8004 states. [2021-08-21 18:58:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8004 to 7225. [2021-08-21 18:58:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7225 states, 7224 states have (on average 2.573920265780731) internal successors, (18594), 7224 states have internal predecessors, (18594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7225 states to 7225 states and 18594 transitions. [2021-08-21 18:58:47,127 INFO L78 Accepts]: Start accepts. Automaton has 7225 states and 18594 transitions. Word has length 32 [2021-08-21 18:58:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:47,127 INFO L470 AbstractCegarLoop]: Abstraction has 7225 states and 18594 transitions. [2021-08-21 18:58:47,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 7225 states and 18594 transitions. [2021-08-21 18:58:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:47,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:47,138 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:47,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-08-21 18:58:47,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:47,339 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:47,339 INFO L82 PathProgramCache]: Analyzing trace with hash 11126993, now seen corresponding path program 9 times [2021-08-21 18:58:47,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:47,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728450186] [2021-08-21 18:58:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:47,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:47,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:47,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728450186] [2021-08-21 18:58:47,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728450186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:47,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681150062] [2021-08-21 18:58:47,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:58:47,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:47,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:47,404 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 18:58:47,407 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 18:58:50,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:58:50,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:50,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:50,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681150062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:50,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:50,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:50,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135459931] [2021-08-21 18:58:50,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:50,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:50,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:50,779 INFO L87 Difference]: Start difference. First operand 7225 states and 18594 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:50,875 INFO L93 Difference]: Finished difference Result 8036 states and 20161 transitions. [2021-08-21 18:58:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:50,892 INFO L225 Difference]: With dead ends: 8036 [2021-08-21 18:58:50,892 INFO L226 Difference]: Without dead ends: 8029 [2021-08-21 18:58:50,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2021-08-21 18:58:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 7229. [2021-08-21 18:58:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7229 states, 7228 states have (on average 2.5741560597675703) internal successors, (18606), 7228 states have internal predecessors, (18606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7229 states to 7229 states and 18606 transitions. [2021-08-21 18:58:51,006 INFO L78 Accepts]: Start accepts. Automaton has 7229 states and 18606 transitions. Word has length 32 [2021-08-21 18:58:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:51,006 INFO L470 AbstractCegarLoop]: Abstraction has 7229 states and 18606 transitions. [2021-08-21 18:58:51,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7229 states and 18606 transitions. [2021-08-21 18:58:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:51,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:51,018 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:51,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-08-21 18:58:51,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:51,218 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash -525100083, now seen corresponding path program 10 times [2021-08-21 18:58:51,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:51,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71714763] [2021-08-21 18:58:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:51,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:51,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:51,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71714763] [2021-08-21 18:58:51,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71714763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:51,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985096405] [2021-08-21 18:58:51,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:51,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:51,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:51,287 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 18:58:51,288 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 18:58:54,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:54,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:54,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:54,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:58:54,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985096405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:54,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:54,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:54,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810354864] [2021-08-21 18:58:54,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:54,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:54,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:54,643 INFO L87 Difference]: Start difference. First operand 7229 states and 18606 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:54,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:54,750 INFO L93 Difference]: Finished difference Result 8007 states and 20091 transitions. [2021-08-21 18:58:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:54,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:54,768 INFO L225 Difference]: With dead ends: 8007 [2021-08-21 18:58:54,768 INFO L226 Difference]: Without dead ends: 8000 [2021-08-21 18:58:54,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8000 states. [2021-08-21 18:58:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8000 to 7213. [2021-08-21 18:58:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7213 states, 7212 states have (on average 2.571547420965058) internal successors, (18546), 7212 states have internal predecessors, (18546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7213 states to 7213 states and 18546 transitions. [2021-08-21 18:58:54,932 INFO L78 Accepts]: Start accepts. Automaton has 7213 states and 18546 transitions. Word has length 32 [2021-08-21 18:58:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:54,932 INFO L470 AbstractCegarLoop]: Abstraction has 7213 states and 18546 transitions. [2021-08-21 18:58:54,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 7213 states and 18546 transitions. [2021-08-21 18:58:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:54,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:54,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:54,974 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 18:58:55,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:55,145 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash 914385669, now seen corresponding path program 4 times [2021-08-21 18:58:55,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:55,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471990640] [2021-08-21 18:58:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:55,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:55,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:55,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471990640] [2021-08-21 18:58:55,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471990640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:55,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147080540] [2021-08-21 18:58:55,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:55,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:55,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:55,209 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 18:58:55,210 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 18:58:58,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:58:58,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:58:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:58:58,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:58:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:58,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147080540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:58,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:58:58,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:58:58,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67600436] [2021-08-21 18:58:58,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:58:58,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:58:58,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:58:58,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:58,570 INFO L87 Difference]: Start difference. First operand 7213 states and 18546 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:58:58,658 INFO L93 Difference]: Finished difference Result 8135 states and 20297 transitions. [2021-08-21 18:58:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:58:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:58:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:58:58,669 INFO L225 Difference]: With dead ends: 8135 [2021-08-21 18:58:58,669 INFO L226 Difference]: Without dead ends: 8124 [2021-08-21 18:58:58,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:58:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8124 states. [2021-08-21 18:58:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8124 to 7199. [2021-08-21 18:58:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7199 states, 7198 states have (on average 2.568908030008336) internal successors, (18491), 7198 states have internal predecessors, (18491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7199 states to 7199 states and 18491 transitions. [2021-08-21 18:58:58,752 INFO L78 Accepts]: Start accepts. Automaton has 7199 states and 18491 transitions. Word has length 32 [2021-08-21 18:58:58,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:58:58,753 INFO L470 AbstractCegarLoop]: Abstraction has 7199 states and 18491 transitions. [2021-08-21 18:58:58,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:58:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7199 states and 18491 transitions. [2021-08-21 18:58:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:58:58,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:58:58,762 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:58:58,789 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 18:58:58,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-08-21 18:58:58,969 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:58:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:58:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash -844989947, now seen corresponding path program 4 times [2021-08-21 18:58:58,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:58:58,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067168461] [2021-08-21 18:58:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:58:58,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:58:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:58:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:58:59,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:58:59,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067168461] [2021-08-21 18:58:59,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067168461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:58:59,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402621877] [2021-08-21 18:58:59,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:58:59,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:58:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:58:59,072 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 18:58:59,073 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 18:59:02,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:02,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:02,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:02,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:02,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402621877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:02,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:02,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:02,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990911157] [2021-08-21 18:59:02,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:02,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:02,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:02,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:02,461 INFO L87 Difference]: Start difference. First operand 7199 states and 18491 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:02,560 INFO L93 Difference]: Finished difference Result 8066 states and 20081 transitions. [2021-08-21 18:59:02,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:02,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:02,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:02,576 INFO L225 Difference]: With dead ends: 8066 [2021-08-21 18:59:02,576 INFO L226 Difference]: Without dead ends: 8059 [2021-08-21 18:59:02,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-08-21 18:59:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 7172. [2021-08-21 18:59:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7172 states, 7171 states have (on average 2.561288523218519) internal successors, (18367), 7171 states have internal predecessors, (18367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7172 states to 7172 states and 18367 transitions. [2021-08-21 18:59:02,690 INFO L78 Accepts]: Start accepts. Automaton has 7172 states and 18367 transitions. Word has length 32 [2021-08-21 18:59:02,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:02,690 INFO L470 AbstractCegarLoop]: Abstraction has 7172 states and 18367 transitions. [2021-08-21 18:59:02,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7172 states and 18367 transitions. [2021-08-21 18:59:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:02,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:02,702 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:02,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2021-08-21 18:59:02,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-08-21 18:59:02,903 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:02,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:02,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1460430913, now seen corresponding path program 5 times [2021-08-21 18:59:02,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:02,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475347483] [2021-08-21 18:59:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:02,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:02,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:02,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475347483] [2021-08-21 18:59:02,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475347483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:02,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588676321] [2021-08-21 18:59:02,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:02,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:02,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:02,969 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 18:59:02,969 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 18:59:06,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:59:06,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:06,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:06,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588676321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:06,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:06,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:06,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319398880] [2021-08-21 18:59:06,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:06,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:06,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:06,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:06,416 INFO L87 Difference]: Start difference. First operand 7172 states and 18367 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:06,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:06,527 INFO L93 Difference]: Finished difference Result 7966 states and 19870 transitions. [2021-08-21 18:59:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:06,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:06,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:06,542 INFO L225 Difference]: With dead ends: 7966 [2021-08-21 18:59:06,543 INFO L226 Difference]: Without dead ends: 7959 [2021-08-21 18:59:06,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7959 states. [2021-08-21 18:59:06,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7959 to 7176. [2021-08-21 18:59:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 2.561533101045296) internal successors, (18379), 7175 states have internal predecessors, (18379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 18379 transitions. [2021-08-21 18:59:06,658 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 18379 transitions. Word has length 32 [2021-08-21 18:59:06,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:06,658 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 18379 transitions. [2021-08-21 18:59:06,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 18379 transitions. [2021-08-21 18:59:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:06,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:06,670 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] [2021-08-21 18:59:06,700 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 18:59:06,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-21 18:59:06,871 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash 410962513, now seen corresponding path program 5 times [2021-08-21 18:59:06,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:06,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656468284] [2021-08-21 18:59:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:06,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:06,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:06,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656468284] [2021-08-21 18:59:06,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656468284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:06,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20753942] [2021-08-21 18:59:06,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:06,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:06,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:06,938 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 18:59:06,938 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 18:59:10,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:59:10,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:10,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:10,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:10,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20753942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:10,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:10,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:10,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377277828] [2021-08-21 18:59:10,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:10,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:10,412 INFO L87 Difference]: Start difference. First operand 7176 states and 18379 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:10,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:10,501 INFO L93 Difference]: Finished difference Result 7941 states and 19852 transitions. [2021-08-21 18:59:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:10,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:10,514 INFO L225 Difference]: With dead ends: 7941 [2021-08-21 18:59:10,515 INFO L226 Difference]: Without dead ends: 7934 [2021-08-21 18:59:10,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7934 states. [2021-08-21 18:59:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7934 to 7170. [2021-08-21 18:59:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 7169 states have (on average 2.559910726740131) internal successors, (18352), 7169 states have internal predecessors, (18352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:10,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 18352 transitions. [2021-08-21 18:59:10,596 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 18352 transitions. Word has length 32 [2021-08-21 18:59:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:10,596 INFO L470 AbstractCegarLoop]: Abstraction has 7170 states and 18352 transitions. [2021-08-21 18:59:10,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:10,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 18352 transitions. [2021-08-21 18:59:10,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:10,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:10,605 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 18:59:10,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-08-21 18:59:10,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-21 18:59:10,806 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash -125264563, now seen corresponding path program 6 times [2021-08-21 18:59:10,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:10,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221288746] [2021-08-21 18:59:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:10,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:10,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:10,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221288746] [2021-08-21 18:59:10,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221288746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:10,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72803914] [2021-08-21 18:59:10,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:10,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:10,874 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 18:59:10,875 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 18:59:14,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:59:14,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:14,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:14,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:14,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72803914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:14,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:14,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:14,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922750378] [2021-08-21 18:59:14,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:14,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:14,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:14,344 INFO L87 Difference]: Start difference. First operand 7170 states and 18352 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:14,433 INFO L93 Difference]: Finished difference Result 7859 states and 19670 transitions. [2021-08-21 18:59:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:14,449 INFO L225 Difference]: With dead ends: 7859 [2021-08-21 18:59:14,449 INFO L226 Difference]: Without dead ends: 7852 [2021-08-21 18:59:14,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2021-08-21 18:59:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 7169. [2021-08-21 18:59:14,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7169 states, 7168 states have (on average 2.5587332589285716) internal successors, (18341), 7168 states have internal predecessors, (18341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7169 states to 7169 states and 18341 transitions. [2021-08-21 18:59:14,539 INFO L78 Accepts]: Start accepts. Automaton has 7169 states and 18341 transitions. Word has length 32 [2021-08-21 18:59:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:14,539 INFO L470 AbstractCegarLoop]: Abstraction has 7169 states and 18341 transitions. [2021-08-21 18:59:14,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 7169 states and 18341 transitions. [2021-08-21 18:59:14,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:14,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:14,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:14,576 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 18:59:14,749 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,SelfDestructingSolverStorable247 [2021-08-21 18:59:14,749 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:14,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:14,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1735821509, now seen corresponding path program 6 times [2021-08-21 18:59:14,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:14,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803073632] [2021-08-21 18:59:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:14,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:14,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:14,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803073632] [2021-08-21 18:59:14,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803073632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:14,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518285831] [2021-08-21 18:59:14,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:59:14,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:14,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:14,816 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 18:59:14,816 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 18:59:18,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:59:18,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:18,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:18,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:18,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518285831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:18,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:18,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:18,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172975426] [2021-08-21 18:59:18,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:18,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:18,307 INFO L87 Difference]: Start difference. First operand 7169 states and 18341 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:18,415 INFO L93 Difference]: Finished difference Result 7928 states and 19761 transitions. [2021-08-21 18:59:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:18,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:18,426 INFO L225 Difference]: With dead ends: 7928 [2021-08-21 18:59:18,426 INFO L226 Difference]: Without dead ends: 7921 [2021-08-21 18:59:18,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:18,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7921 states. [2021-08-21 18:59:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7921 to 7140. [2021-08-21 18:59:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 2.5497968903207733) internal successors, (18203), 7139 states have internal predecessors, (18203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 18203 transitions. [2021-08-21 18:59:18,510 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 18203 transitions. Word has length 32 [2021-08-21 18:59:18,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:18,510 INFO L470 AbstractCegarLoop]: Abstraction has 7140 states and 18203 transitions. [2021-08-21 18:59:18,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:18,510 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 18203 transitions. [2021-08-21 18:59:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:18,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:18,519 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:18,547 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 18:59:18,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:18,720 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash 769458109, now seen corresponding path program 1 times [2021-08-21 18:59:18,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:18,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103742227] [2021-08-21 18:59:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:18,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 18:59:18,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:18,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103742227] [2021-08-21 18:59:18,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103742227] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:59:18,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:59:18,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:59:18,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316961759] [2021-08-21 18:59:18,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:18,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:18,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:18,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:18,783 INFO L87 Difference]: Start difference. First operand 7140 states and 18203 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:18,863 INFO L93 Difference]: Finished difference Result 8216 states and 20262 transitions. [2021-08-21 18:59:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:18,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:18,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:18,875 INFO L225 Difference]: With dead ends: 8216 [2021-08-21 18:59:18,875 INFO L226 Difference]: Without dead ends: 8205 [2021-08-21 18:59:18,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8205 states. [2021-08-21 18:59:18,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8205 to 7204. [2021-08-21 18:59:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7204 states, 7203 states have (on average 2.5472719700124946) internal successors, (18348), 7203 states have internal predecessors, (18348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 18348 transitions. [2021-08-21 18:59:18,957 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 18348 transitions. Word has length 32 [2021-08-21 18:59:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:18,957 INFO L470 AbstractCegarLoop]: Abstraction has 7204 states and 18348 transitions. [2021-08-21 18:59:18,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 18348 transitions. [2021-08-21 18:59:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:18,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:18,967 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:18,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249 [2021-08-21 18:59:18,967 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash 722098749, now seen corresponding path program 4 times [2021-08-21 18:59:18,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:18,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157529188] [2021-08-21 18:59:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:18,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:19,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:19,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:19,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157529188] [2021-08-21 18:59:19,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157529188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:19,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387380020] [2021-08-21 18:59:19,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:19,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:19,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:19,036 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 18:59:19,036 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 18:59:22,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:22,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:22,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:22,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387380020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:22,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:22,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:22,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171861869] [2021-08-21 18:59:22,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:22,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:22,551 INFO L87 Difference]: Start difference. First operand 7204 states and 18348 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:22,652 INFO L93 Difference]: Finished difference Result 8168 states and 20153 transitions. [2021-08-21 18:59:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:22,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:22,667 INFO L225 Difference]: With dead ends: 8168 [2021-08-21 18:59:22,668 INFO L226 Difference]: Without dead ends: 8161 [2021-08-21 18:59:22,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:22,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8161 states. [2021-08-21 18:59:22,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8161 to 7234. [2021-08-21 18:59:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7234 states, 7233 states have (on average 2.5499792617171297) internal successors, (18444), 7233 states have internal predecessors, (18444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7234 states to 7234 states and 18444 transitions. [2021-08-21 18:59:22,755 INFO L78 Accepts]: Start accepts. Automaton has 7234 states and 18444 transitions. Word has length 32 [2021-08-21 18:59:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:22,755 INFO L470 AbstractCegarLoop]: Abstraction has 7234 states and 18444 transitions. [2021-08-21 18:59:22,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 7234 states and 18444 transitions. [2021-08-21 18:59:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:22,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:22,764 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:22,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-21 18:59:22,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:22,964 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:22,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:22,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1607032519, now seen corresponding path program 7 times [2021-08-21 18:59:22,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:22,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934619007] [2021-08-21 18:59:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:22,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:23,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:23,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934619007] [2021-08-21 18:59:23,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934619007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:23,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086786704] [2021-08-21 18:59:23,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:59:23,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:23,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:23,031 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 18:59:23,031 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 18:59:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:26,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:26,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086786704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:26,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:26,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:26,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843709291] [2021-08-21 18:59:26,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:26,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:26,587 INFO L87 Difference]: Start difference. First operand 7234 states and 18444 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:26,671 INFO L93 Difference]: Finished difference Result 8204 states and 20269 transitions. [2021-08-21 18:59:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:26,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:26,685 INFO L225 Difference]: With dead ends: 8204 [2021-08-21 18:59:26,685 INFO L226 Difference]: Without dead ends: 8197 [2021-08-21 18:59:26,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8197 states. [2021-08-21 18:59:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8197 to 7259. [2021-08-21 18:59:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7259 states, 7258 states have (on average 2.551391567925048) internal successors, (18518), 7258 states have internal predecessors, (18518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 18518 transitions. [2021-08-21 18:59:26,772 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 18518 transitions. Word has length 32 [2021-08-21 18:59:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:26,772 INFO L470 AbstractCegarLoop]: Abstraction has 7259 states and 18518 transitions. [2021-08-21 18:59:26,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 18518 transitions. [2021-08-21 18:59:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:26,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:26,781 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:26,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2021-08-21 18:59:26,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:26,982 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:26,982 INFO L82 PathProgramCache]: Analyzing trace with hash 358803509, now seen corresponding path program 8 times [2021-08-21 18:59:26,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:26,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799204527] [2021-08-21 18:59:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:26,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:27,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:27,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799204527] [2021-08-21 18:59:27,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799204527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:27,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866181177] [2021-08-21 18:59:27,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:59:27,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:27,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:27,061 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 18:59:27,062 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 18:59:30,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:30,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:30,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:30,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866181177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:30,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:30,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:30,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789893603] [2021-08-21 18:59:30,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:30,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:30,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:30,691 INFO L87 Difference]: Start difference. First operand 7259 states and 18518 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:30,772 INFO L93 Difference]: Finished difference Result 8151 states and 20206 transitions. [2021-08-21 18:59:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:30,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:30,784 INFO L225 Difference]: With dead ends: 8151 [2021-08-21 18:59:30,784 INFO L226 Difference]: Without dead ends: 8144 [2021-08-21 18:59:30,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8144 states. [2021-08-21 18:59:30,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8144 to 7284. [2021-08-21 18:59:30,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7284 states, 7283 states have (on average 2.5525195661128657) internal successors, (18590), 7283 states have internal predecessors, (18590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7284 states to 7284 states and 18590 transitions. [2021-08-21 18:59:30,869 INFO L78 Accepts]: Start accepts. Automaton has 7284 states and 18590 transitions. Word has length 32 [2021-08-21 18:59:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:30,869 INFO L470 AbstractCegarLoop]: Abstraction has 7284 states and 18590 transitions. [2021-08-21 18:59:30,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 7284 states and 18590 transitions. [2021-08-21 18:59:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:30,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:30,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:30,906 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 18:59:31,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:31,079 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1970327759, now seen corresponding path program 2 times [2021-08-21 18:59:31,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:31,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656310714] [2021-08-21 18:59:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:31,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:31,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:31,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656310714] [2021-08-21 18:59:31,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656310714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:31,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425516754] [2021-08-21 18:59:31,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:59:31,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:31,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:31,157 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 18:59:31,158 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 18:59:34,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:59:34,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:34,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:34,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425516754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:34,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:34,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:34,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311070820] [2021-08-21 18:59:34,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:34,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:34,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:34,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:34,740 INFO L87 Difference]: Start difference. First operand 7284 states and 18590 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:34,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:34,821 INFO L93 Difference]: Finished difference Result 8216 states and 20328 transitions. [2021-08-21 18:59:34,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:34,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:34,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:34,833 INFO L225 Difference]: With dead ends: 8216 [2021-08-21 18:59:34,833 INFO L226 Difference]: Without dead ends: 8209 [2021-08-21 18:59:34,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8209 states. [2021-08-21 18:59:34,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8209 to 7301. [2021-08-21 18:59:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7301 states, 7300 states have (on average 2.5526027397260274) internal successors, (18634), 7300 states have internal predecessors, (18634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7301 states to 7301 states and 18634 transitions. [2021-08-21 18:59:34,921 INFO L78 Accepts]: Start accepts. Automaton has 7301 states and 18634 transitions. Word has length 32 [2021-08-21 18:59:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:34,921 INFO L470 AbstractCegarLoop]: Abstraction has 7301 states and 18634 transitions. [2021-08-21 18:59:34,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 7301 states and 18634 transitions. [2021-08-21 18:59:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:34,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:34,931 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:34,959 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 18:59:35,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:35,137 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1518450193, now seen corresponding path program 7 times [2021-08-21 18:59:35,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:35,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970174344] [2021-08-21 18:59:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:35,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:35,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:35,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970174344] [2021-08-21 18:59:35,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970174344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:35,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256943515] [2021-08-21 18:59:35,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:59:35,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:35,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:35,201 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 18:59:35,202 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 18:59:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:38,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:38,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:38,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256943515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:38,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:38,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:38,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087143076] [2021-08-21 18:59:38,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:38,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:38,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:38,832 INFO L87 Difference]: Start difference. First operand 7301 states and 18634 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:38,904 INFO L93 Difference]: Finished difference Result 8222 states and 20354 transitions. [2021-08-21 18:59:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:38,916 INFO L225 Difference]: With dead ends: 8222 [2021-08-21 18:59:38,917 INFO L226 Difference]: Without dead ends: 8187 [2021-08-21 18:59:38,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:38,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8187 states. [2021-08-21 18:59:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8187 to 7326. [2021-08-21 18:59:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7326 states, 7325 states have (on average 2.5474402730375427) internal successors, (18660), 7325 states have internal predecessors, (18660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7326 states to 7326 states and 18660 transitions. [2021-08-21 18:59:39,005 INFO L78 Accepts]: Start accepts. Automaton has 7326 states and 18660 transitions. Word has length 32 [2021-08-21 18:59:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:39,005 INFO L470 AbstractCegarLoop]: Abstraction has 7326 states and 18660 transitions. [2021-08-21 18:59:39,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7326 states and 18660 transitions. [2021-08-21 18:59:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:39,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:39,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:39,043 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 18:59:39,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-08-21 18:59:39,217 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash -240925423, now seen corresponding path program 3 times [2021-08-21 18:59:39,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:39,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192115126] [2021-08-21 18:59:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:39,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:39,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:39,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192115126] [2021-08-21 18:59:39,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192115126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:39,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606907490] [2021-08-21 18:59:39,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:59:39,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:39,292 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 18:59:39,292 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 18:59:42,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:59:42,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:42,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:42,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606907490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:42,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:42,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:42,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607432235] [2021-08-21 18:59:42,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:42,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:42,947 INFO L87 Difference]: Start difference. First operand 7326 states and 18660 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:43,036 INFO L93 Difference]: Finished difference Result 8200 states and 20250 transitions. [2021-08-21 18:59:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:43,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:43,050 INFO L225 Difference]: With dead ends: 8200 [2021-08-21 18:59:43,050 INFO L226 Difference]: Without dead ends: 8193 [2021-08-21 18:59:43,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8193 states. [2021-08-21 18:59:43,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8193 to 7289. [2021-08-21 18:59:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7289 states, 7288 states have (on average 2.54198682766191) internal successors, (18526), 7288 states have internal predecessors, (18526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 18526 transitions. [2021-08-21 18:59:43,146 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 18526 transitions. Word has length 32 [2021-08-21 18:59:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:43,146 INFO L470 AbstractCegarLoop]: Abstraction has 7289 states and 18526 transitions. [2021-08-21 18:59:43,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 18526 transitions. [2021-08-21 18:59:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:43,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:43,157 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:43,185 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 18:59:43,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-21 18:59:43,360 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1495855215, now seen corresponding path program 4 times [2021-08-21 18:59:43,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:43,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922204857] [2021-08-21 18:59:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:43,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:43,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:43,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922204857] [2021-08-21 18:59:43,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922204857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:43,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154661572] [2021-08-21 18:59:43,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:43,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:43,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:43,427 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 18:59:43,428 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 18:59:46,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:46,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:46,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:59:47,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154661572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:47,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:47,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:47,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664365632] [2021-08-21 18:59:47,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:47,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:47,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:47,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:47,183 INFO L87 Difference]: Start difference. First operand 7289 states and 18526 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:47,268 INFO L93 Difference]: Finished difference Result 8323 states and 20472 transitions. [2021-08-21 18:59:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:47,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:47,279 INFO L225 Difference]: With dead ends: 8323 [2021-08-21 18:59:47,279 INFO L226 Difference]: Without dead ends: 8312 [2021-08-21 18:59:47,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8312 states. [2021-08-21 18:59:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8312 to 7313. [2021-08-21 18:59:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7313 states, 7312 states have (on average 2.539660831509847) internal successors, (18570), 7312 states have internal predecessors, (18570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:47,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7313 states to 7313 states and 18570 transitions. [2021-08-21 18:59:47,364 INFO L78 Accepts]: Start accepts. Automaton has 7313 states and 18570 transitions. Word has length 32 [2021-08-21 18:59:47,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:47,364 INFO L470 AbstractCegarLoop]: Abstraction has 7313 states and 18570 transitions. [2021-08-21 18:59:47,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7313 states and 18570 transitions. [2021-08-21 18:59:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:47,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:47,375 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:47,401 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 18:59:47,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-21 18:59:47,575 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:47,575 INFO L82 PathProgramCache]: Analyzing trace with hash 422621453, now seen corresponding path program 10 times [2021-08-21 18:59:47,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:47,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237604278] [2021-08-21 18:59:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:47,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:47,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:47,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237604278] [2021-08-21 18:59:47,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237604278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:47,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263767674] [2021-08-21 18:59:47,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:59:47,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:47,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:47,643 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 18:59:47,644 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 18:59:51,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:59:51,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:51,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:51,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263767674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:51,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:51,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:51,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134937003] [2021-08-21 18:59:51,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:51,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:51,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:51,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:51,276 INFO L87 Difference]: Start difference. First operand 7313 states and 18570 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:51,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:51,367 INFO L93 Difference]: Finished difference Result 8256 states and 20378 transitions. [2021-08-21 18:59:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:51,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:51,378 INFO L225 Difference]: With dead ends: 8256 [2021-08-21 18:59:51,379 INFO L226 Difference]: Without dead ends: 8249 [2021-08-21 18:59:51,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:51,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8249 states. [2021-08-21 18:59:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8249 to 7329. [2021-08-21 18:59:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7329 states, 7328 states have (on average 2.539028384279476) internal successors, (18606), 7328 states have internal predecessors, (18606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7329 states to 7329 states and 18606 transitions. [2021-08-21 18:59:51,477 INFO L78 Accepts]: Start accepts. Automaton has 7329 states and 18606 transitions. Word has length 32 [2021-08-21 18:59:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:51,477 INFO L470 AbstractCegarLoop]: Abstraction has 7329 states and 18606 transitions. [2021-08-21 18:59:51,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:51,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7329 states and 18606 transitions. [2021-08-21 18:59:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:51,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:51,489 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:51,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2021-08-21 18:59:51,689 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,SelfDestructingSolverStorable257 [2021-08-21 18:59:51,690 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:51,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:51,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1906509815, now seen corresponding path program 5 times [2021-08-21 18:59:51,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:51,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241884737] [2021-08-21 18:59:51,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:51,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:51,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:51,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241884737] [2021-08-21 18:59:51,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241884737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:51,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266284319] [2021-08-21 18:59:51,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:51,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:51,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:51,757 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 18:59:51,757 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 18:59:55,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:59:55,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:55,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:55,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:55,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266284319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:55,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:55,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:55,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321708432] [2021-08-21 18:59:55,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:55,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:55,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:55,445 INFO L87 Difference]: Start difference. First operand 7329 states and 18606 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:55,544 INFO L93 Difference]: Finished difference Result 8174 states and 20215 transitions. [2021-08-21 18:59:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:55,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:55,560 INFO L225 Difference]: With dead ends: 8174 [2021-08-21 18:59:55,560 INFO L226 Difference]: Without dead ends: 8167 [2021-08-21 18:59:55,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8167 states. [2021-08-21 18:59:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8167 to 7337. [2021-08-21 18:59:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7337 states, 7336 states have (on average 2.5395310796074155) internal successors, (18630), 7336 states have internal predecessors, (18630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7337 states to 7337 states and 18630 transitions. [2021-08-21 18:59:55,675 INFO L78 Accepts]: Start accepts. Automaton has 7337 states and 18630 transitions. Word has length 32 [2021-08-21 18:59:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:55,675 INFO L470 AbstractCegarLoop]: Abstraction has 7337 states and 18630 transitions. [2021-08-21 18:59:55,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 7337 states and 18630 transitions. [2021-08-21 18:59:55,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:55,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:55,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:55,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2021-08-21 18:59:55,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:55,887 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 18:59:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:59:55,888 INFO L82 PathProgramCache]: Analyzing trace with hash 59326213, now seen corresponding path program 5 times [2021-08-21 18:59:55,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:59:55,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937623906] [2021-08-21 18:59:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:59:55,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:59:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:59:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:55,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:59:55,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937623906] [2021-08-21 18:59:55,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937623906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:55,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71906497] [2021-08-21 18:59:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:59:55,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:59:55,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:59:55,957 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 18:59:55,957 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 18:59:59,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:59:59,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:59:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:59:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:59:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:59:59,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71906497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:59:59,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:59:59,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 18:59:59,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711472486] [2021-08-21 18:59:59,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 18:59:59,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:59:59,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 18:59:59,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:59,734 INFO L87 Difference]: Start difference. First operand 7337 states and 18630 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:59,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:59:59,823 INFO L93 Difference]: Finished difference Result 8234 states and 20356 transitions. [2021-08-21 18:59:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:59:59,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 18:59:59,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:59:59,835 INFO L225 Difference]: With dead ends: 8234 [2021-08-21 18:59:59,835 INFO L226 Difference]: Without dead ends: 8227 [2021-08-21 18:59:59,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:59:59,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-08-21 18:59:59,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 7349. [2021-08-21 18:59:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 7348 states have (on average 2.539738704409363) internal successors, (18662), 7348 states have internal predecessors, (18662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 18662 transitions. [2021-08-21 18:59:59,928 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 18662 transitions. Word has length 32 [2021-08-21 18:59:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:59:59,928 INFO L470 AbstractCegarLoop]: Abstraction has 7349 states and 18662 transitions. [2021-08-21 18:59:59,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:59:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 18662 transitions. [2021-08-21 18:59:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 18:59:59,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:59:59,937 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:59:59,966 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 19:00:00,137 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,SelfDestructingSolverStorable259 [2021-08-21 19:00:00,138 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:00,138 INFO L82 PathProgramCache]: Analyzing trace with hash -10318191, now seen corresponding path program 11 times [2021-08-21 19:00:00,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:00,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081774256] [2021-08-21 19:00:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:00,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:00,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:00,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081774256] [2021-08-21 19:00:00,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081774256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:00,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126079306] [2021-08-21 19:00:00,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:00:00,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:00,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:00,208 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 19:00:00,209 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 19:00:03,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:00:03,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:03,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:03,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:04,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126079306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:04,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:04,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:04,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894386134] [2021-08-21 19:00:04,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:04,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:04,013 INFO L87 Difference]: Start difference. First operand 7349 states and 18662 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:04,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:04,116 INFO L93 Difference]: Finished difference Result 8197 states and 20256 transitions. [2021-08-21 19:00:04,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:04,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:04,134 INFO L225 Difference]: With dead ends: 8197 [2021-08-21 19:00:04,134 INFO L226 Difference]: Without dead ends: 8190 [2021-08-21 19:00:04,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8190 states. [2021-08-21 19:00:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8190 to 7365. [2021-08-21 19:00:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7365 states, 7364 states have (on average 2.5391091797935905) internal successors, (18698), 7364 states have internal predecessors, (18698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 18698 transitions. [2021-08-21 19:00:04,261 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 18698 transitions. Word has length 32 [2021-08-21 19:00:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:04,261 INFO L470 AbstractCegarLoop]: Abstraction has 7365 states and 18698 transitions. [2021-08-21 19:00:04,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 18698 transitions. [2021-08-21 19:00:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:04,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:04,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:04,306 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 19:00:04,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:04,476 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash 801056533, now seen corresponding path program 6 times [2021-08-21 19:00:04,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:04,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640198677] [2021-08-21 19:00:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:04,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:04,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:04,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640198677] [2021-08-21 19:00:04,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640198677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:04,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235741567] [2021-08-21 19:00:04,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:00:04,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:04,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:04,554 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 19:00:04,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-21 19:00:08,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:00:08,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:08,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:08,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:08,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235741567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:08,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:08,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:08,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730251514] [2021-08-21 19:00:08,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:08,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:08,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:08,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:08,666 INFO L87 Difference]: Start difference. First operand 7365 states and 18698 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:08,769 INFO L93 Difference]: Finished difference Result 8149 states and 20157 transitions. [2021-08-21 19:00:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:08,782 INFO L225 Difference]: With dead ends: 8149 [2021-08-21 19:00:08,783 INFO L226 Difference]: Without dead ends: 8142 [2021-08-21 19:00:08,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8142 states. [2021-08-21 19:00:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8142 to 7373. [2021-08-21 19:00:08,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7373 states, 7372 states have (on average 2.539609332609875) internal successors, (18722), 7372 states have internal predecessors, (18722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7373 states to 7373 states and 18722 transitions. [2021-08-21 19:00:08,894 INFO L78 Accepts]: Start accepts. Automaton has 7373 states and 18722 transitions. Word has length 32 [2021-08-21 19:00:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:08,894 INFO L470 AbstractCegarLoop]: Abstraction has 7373 states and 18722 transitions. [2021-08-21 19:00:08,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7373 states and 18722 transitions. [2021-08-21 19:00:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:08,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:08,905 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:08,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-21 19:00:09,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:09,106 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1612431257, now seen corresponding path program 6 times [2021-08-21 19:00:09,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:09,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327242600] [2021-08-21 19:00:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:09,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:09,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:09,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327242600] [2021-08-21 19:00:09,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327242600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:09,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782872935] [2021-08-21 19:00:09,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:00:09,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:09,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:09,175 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:09,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-21 19:00:12,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:00:12,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:12,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:12,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:13,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782872935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:13,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:13,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:13,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579360525] [2021-08-21 19:00:13,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:13,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:13,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:13,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:13,016 INFO L87 Difference]: Start difference. First operand 7373 states and 18722 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:13,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:13,110 INFO L93 Difference]: Finished difference Result 8193 states and 20261 transitions. [2021-08-21 19:00:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:13,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:13,124 INFO L225 Difference]: With dead ends: 8193 [2021-08-21 19:00:13,124 INFO L226 Difference]: Without dead ends: 8186 [2021-08-21 19:00:13,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:13,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8186 states. [2021-08-21 19:00:13,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8186 to 7365. [2021-08-21 19:00:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7365 states, 7364 states have (on average 2.535306898424769) internal successors, (18670), 7364 states have internal predecessors, (18670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 18670 transitions. [2021-08-21 19:00:13,223 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 18670 transitions. Word has length 32 [2021-08-21 19:00:13,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:13,223 INFO L470 AbstractCegarLoop]: Abstraction has 7365 states and 18670 transitions. [2021-08-21 19:00:13,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 18670 transitions. [2021-08-21 19:00:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:13,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:13,234 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:13,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:13,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:13,435 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:13,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:13,435 INFO L82 PathProgramCache]: Analyzing trace with hash 846173973, now seen corresponding path program 7 times [2021-08-21 19:00:13,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:13,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669698655] [2021-08-21 19:00:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:13,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:13,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:13,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669698655] [2021-08-21 19:00:13,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669698655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:13,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71705265] [2021-08-21 19:00:13,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:00:13,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:13,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:13,502 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:13,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-21 19:00:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:17,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:17,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:17,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71705265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:17,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:17,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:17,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581865828] [2021-08-21 19:00:17,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:17,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:17,492 INFO L87 Difference]: Start difference. First operand 7365 states and 18670 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:17,584 INFO L93 Difference]: Finished difference Result 8398 states and 20618 transitions. [2021-08-21 19:00:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:17,600 INFO L225 Difference]: With dead ends: 8398 [2021-08-21 19:00:17,601 INFO L226 Difference]: Without dead ends: 8387 [2021-08-21 19:00:17,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8387 states. [2021-08-21 19:00:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8387 to 7389. [2021-08-21 19:00:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7389 states, 7388 states have (on average 2.533026529507309) internal successors, (18714), 7388 states have internal predecessors, (18714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7389 states to 7389 states and 18714 transitions. [2021-08-21 19:00:17,721 INFO L78 Accepts]: Start accepts. Automaton has 7389 states and 18714 transitions. Word has length 32 [2021-08-21 19:00:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:17,721 INFO L470 AbstractCegarLoop]: Abstraction has 7389 states and 18714 transitions. [2021-08-21 19:00:17,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7389 states and 18714 transitions. [2021-08-21 19:00:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:17,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:17,733 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:17,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2021-08-21 19:00:17,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:17,934 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:17,934 INFO L82 PathProgramCache]: Analyzing trace with hash 435519373, now seen corresponding path program 9 times [2021-08-21 19:00:17,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:17,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140474708] [2021-08-21 19:00:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:17,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:18,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:18,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140474708] [2021-08-21 19:00:18,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140474708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:18,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997363009] [2021-08-21 19:00:18,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:00:18,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:18,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:18,004 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:18,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-21 19:00:21,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:00:21,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:21,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:21,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:21,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997363009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:21,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:21,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:21,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926815088] [2021-08-21 19:00:21,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:21,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:21,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:21,883 INFO L87 Difference]: Start difference. First operand 7389 states and 18714 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:21,978 INFO L93 Difference]: Finished difference Result 8234 states and 20327 transitions. [2021-08-21 19:00:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:21,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:21,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:21,994 INFO L225 Difference]: With dead ends: 8234 [2021-08-21 19:00:21,994 INFO L226 Difference]: Without dead ends: 8227 [2021-08-21 19:00:21,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-08-21 19:00:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 7397. [2021-08-21 19:00:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7397 states, 7396 states have (on average 2.5335316387236344) internal successors, (18738), 7396 states have internal predecessors, (18738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7397 states to 7397 states and 18738 transitions. [2021-08-21 19:00:22,114 INFO L78 Accepts]: Start accepts. Automaton has 7397 states and 18738 transitions. Word has length 32 [2021-08-21 19:00:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:22,114 INFO L470 AbstractCegarLoop]: Abstraction has 7397 states and 18738 transitions. [2021-08-21 19:00:22,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7397 states and 18738 transitions. [2021-08-21 19:00:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:22,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:22,127 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:22,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2021-08-21 19:00:22,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-08-21 19:00:22,328 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:22,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:22,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1893611895, now seen corresponding path program 8 times [2021-08-21 19:00:22,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:22,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203489378] [2021-08-21 19:00:22,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:22,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:22,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:22,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203489378] [2021-08-21 19:00:22,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203489378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:22,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076751705] [2021-08-21 19:00:22,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:00:22,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:22,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:22,399 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:22,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-21 19:00:26,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:00:26,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:26,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:26,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076751705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:26,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:26,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:26,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389084504] [2021-08-21 19:00:26,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:26,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:26,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:26,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:26,305 INFO L87 Difference]: Start difference. First operand 7397 states and 18738 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:26,400 INFO L93 Difference]: Finished difference Result 8295 states and 20468 transitions. [2021-08-21 19:00:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:26,417 INFO L225 Difference]: With dead ends: 8295 [2021-08-21 19:00:26,417 INFO L226 Difference]: Without dead ends: 8288 [2021-08-21 19:00:26,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2021-08-21 19:00:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 7409. [2021-08-21 19:00:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7409 states, 7408 states have (on average 2.5337473002159827) internal successors, (18770), 7408 states have internal predecessors, (18770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7409 states to 7409 states and 18770 transitions. [2021-08-21 19:00:26,536 INFO L78 Accepts]: Start accepts. Automaton has 7409 states and 18770 transitions. Word has length 32 [2021-08-21 19:00:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:26,536 INFO L470 AbstractCegarLoop]: Abstraction has 7409 states and 18770 transitions. [2021-08-21 19:00:26,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 7409 states and 18770 transitions. [2021-08-21 19:00:26,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:26,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:26,549 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:26,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:26,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-21 19:00:26,749 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:26,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:26,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2579729, now seen corresponding path program 10 times [2021-08-21 19:00:26,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:26,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425829356] [2021-08-21 19:00:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:26,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:26,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:26,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425829356] [2021-08-21 19:00:26,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425829356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:26,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303592071] [2021-08-21 19:00:26,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:26,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:26,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:26,820 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:26,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-21 19:00:30,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:30,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:30,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:30,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:30,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303592071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:30,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:30,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:30,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273206471] [2021-08-21 19:00:30,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:30,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:30,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:30,736 INFO L87 Difference]: Start difference. First operand 7409 states and 18770 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:30,843 INFO L93 Difference]: Finished difference Result 8195 states and 20234 transitions. [2021-08-21 19:00:30,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:30,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:30,854 INFO L225 Difference]: With dead ends: 8195 [2021-08-21 19:00:30,854 INFO L226 Difference]: Without dead ends: 8188 [2021-08-21 19:00:30,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2021-08-21 19:00:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 7417. [2021-08-21 19:00:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7417 states, 7416 states have (on average 2.534250269687163) internal successors, (18794), 7416 states have internal predecessors, (18794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7417 states to 7417 states and 18794 transitions. [2021-08-21 19:00:30,937 INFO L78 Accepts]: Start accepts. Automaton has 7417 states and 18794 transitions. Word has length 32 [2021-08-21 19:00:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:30,937 INFO L470 AbstractCegarLoop]: Abstraction has 7417 states and 18794 transitions. [2021-08-21 19:00:30,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:30,937 INFO L276 IsEmpty]: Start isEmpty. Operand 7417 states and 18794 transitions. [2021-08-21 19:00:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:30,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:30,946 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:30,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-21 19:00:31,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:31,147 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash 813954453, now seen corresponding path program 9 times [2021-08-21 19:00:31,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:31,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768618089] [2021-08-21 19:00:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:31,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:31,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:31,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768618089] [2021-08-21 19:00:31,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768618089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:31,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911967194] [2021-08-21 19:00:31,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:00:31,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:31,216 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:31,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-21 19:00:34,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:00:34,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:34,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:34,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:35,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911967194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:35,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:35,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:35,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819555507] [2021-08-21 19:00:35,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:35,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:35,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:35,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:35,103 INFO L87 Difference]: Start difference. First operand 7417 states and 18794 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:35,197 INFO L93 Difference]: Finished difference Result 8239 states and 20335 transitions. [2021-08-21 19:00:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:35,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:35,211 INFO L225 Difference]: With dead ends: 8239 [2021-08-21 19:00:35,211 INFO L226 Difference]: Without dead ends: 8232 [2021-08-21 19:00:35,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2021-08-21 19:00:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 7404. [2021-08-21 19:00:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7404 states, 7403 states have (on average 2.531406186681075) internal successors, (18740), 7403 states have internal predecessors, (18740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7404 states to 7404 states and 18740 transitions. [2021-08-21 19:00:35,305 INFO L78 Accepts]: Start accepts. Automaton has 7404 states and 18740 transitions. Word has length 32 [2021-08-21 19:00:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:35,305 INFO L470 AbstractCegarLoop]: Abstraction has 7404 states and 18740 transitions. [2021-08-21 19:00:35,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 7404 states and 18740 transitions. [2021-08-21 19:00:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:35,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:35,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:35,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-21 19:00:35,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-08-21 19:00:35,515 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:35,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:35,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1106764135, now seen corresponding path program 4 times [2021-08-21 19:00:35,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:35,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76863145] [2021-08-21 19:00:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:35,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:35,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:35,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76863145] [2021-08-21 19:00:35,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76863145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:35,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157346836] [2021-08-21 19:00:35,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:35,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:35,590 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:35,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-21 19:00:39,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:39,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:39,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:39,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:39,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157346836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:39,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:39,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:39,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901392415] [2021-08-21 19:00:39,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:39,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:39,495 INFO L87 Difference]: Start difference. First operand 7404 states and 18740 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:39,595 INFO L93 Difference]: Finished difference Result 8335 states and 20496 transitions. [2021-08-21 19:00:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:39,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:39,611 INFO L225 Difference]: With dead ends: 8335 [2021-08-21 19:00:39,611 INFO L226 Difference]: Without dead ends: 8324 [2021-08-21 19:00:39,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8324 states. [2021-08-21 19:00:39,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8324 to 7420. [2021-08-21 19:00:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7420 states, 7419 states have (on average 2.5302601428763984) internal successors, (18772), 7419 states have internal predecessors, (18772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7420 states to 7420 states and 18772 transitions. [2021-08-21 19:00:39,725 INFO L78 Accepts]: Start accepts. Automaton has 7420 states and 18772 transitions. Word has length 32 [2021-08-21 19:00:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:39,725 INFO L470 AbstractCegarLoop]: Abstraction has 7420 states and 18772 transitions. [2021-08-21 19:00:39,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 7420 states and 18772 transitions. [2021-08-21 19:00:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:39,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:39,737 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:39,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2021-08-21 19:00:39,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-08-21 19:00:39,937 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:39,938 INFO L82 PathProgramCache]: Analyzing trace with hash 448417293, now seen corresponding path program 5 times [2021-08-21 19:00:39,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:39,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877135513] [2021-08-21 19:00:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:39,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:40,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:40,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877135513] [2021-08-21 19:00:40,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877135513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:40,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889374222] [2021-08-21 19:00:40,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:00:40,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:40,021 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:40,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-21 19:00:43,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:00:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:43,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:43,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889374222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:43,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:43,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:43,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787866185] [2021-08-21 19:00:43,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:43,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:43,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:43,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:43,996 INFO L87 Difference]: Start difference. First operand 7420 states and 18772 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:44,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:44,081 INFO L93 Difference]: Finished difference Result 8226 states and 20305 transitions. [2021-08-21 19:00:44,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:44,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:44,093 INFO L225 Difference]: With dead ends: 8226 [2021-08-21 19:00:44,093 INFO L226 Difference]: Without dead ends: 8219 [2021-08-21 19:00:44,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8219 states. [2021-08-21 19:00:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8219 to 7428. [2021-08-21 19:00:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7428 states, 7427 states have (on average 2.53076612360307) internal successors, (18796), 7427 states have internal predecessors, (18796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7428 states to 7428 states and 18796 transitions. [2021-08-21 19:00:44,209 INFO L78 Accepts]: Start accepts. Automaton has 7428 states and 18796 transitions. Word has length 32 [2021-08-21 19:00:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:44,209 INFO L470 AbstractCegarLoop]: Abstraction has 7428 states and 18796 transitions. [2021-08-21 19:00:44,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand 7428 states and 18796 transitions. [2021-08-21 19:00:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:44,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:44,218 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:44,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2021-08-21 19:00:44,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-08-21 19:00:44,419 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:44,419 INFO L82 PathProgramCache]: Analyzing trace with hash 15477649, now seen corresponding path program 6 times [2021-08-21 19:00:44,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:44,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528128729] [2021-08-21 19:00:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:44,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:44,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:44,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528128729] [2021-08-21 19:00:44,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528128729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:44,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758721168] [2021-08-21 19:00:44,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:00:44,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:44,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:44,487 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:44,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-21 19:00:48,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:00:48,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:48,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:48,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758721168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:48,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:48,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:48,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645913525] [2021-08-21 19:00:48,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:48,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:48,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:48,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:48,472 INFO L87 Difference]: Start difference. First operand 7428 states and 18796 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:48,570 INFO L93 Difference]: Finished difference Result 8135 states and 20110 transitions. [2021-08-21 19:00:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:48,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:48,582 INFO L225 Difference]: With dead ends: 8135 [2021-08-21 19:00:48,582 INFO L226 Difference]: Without dead ends: 8128 [2021-08-21 19:00:48,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8128 states. [2021-08-21 19:00:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8128 to 7424. [2021-08-21 19:00:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7424 states, 7423 states have (on average 2.5286272396605147) internal successors, (18770), 7423 states have internal predecessors, (18770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7424 states to 7424 states and 18770 transitions. [2021-08-21 19:00:48,668 INFO L78 Accepts]: Start accepts. Automaton has 7424 states and 18770 transitions. Word has length 32 [2021-08-21 19:00:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:48,668 INFO L470 AbstractCegarLoop]: Abstraction has 7424 states and 18770 transitions. [2021-08-21 19:00:48,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7424 states and 18770 transitions. [2021-08-21 19:00:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:48,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:48,677 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:48,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2021-08-21 19:00:48,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:48,878 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:48,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1235265053, now seen corresponding path program 10 times [2021-08-21 19:00:48,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:48,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234906782] [2021-08-21 19:00:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:48,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:49,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:49,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234906782] [2021-08-21 19:00:49,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234906782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:49,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562661375] [2021-08-21 19:00:49,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:00:49,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:49,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:49,013 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:49,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-21 19:00:52,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:00:52,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:52,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:52,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:52,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562661375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:52,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:52,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:52,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359757445] [2021-08-21 19:00:52,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:52,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:52,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:52,910 INFO L87 Difference]: Start difference. First operand 7424 states and 18770 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:52,991 INFO L93 Difference]: Finished difference Result 8411 states and 20614 transitions. [2021-08-21 19:00:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:53,004 INFO L225 Difference]: With dead ends: 8411 [2021-08-21 19:00:53,005 INFO L226 Difference]: Without dead ends: 8400 [2021-08-21 19:00:53,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:53,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8400 states. [2021-08-21 19:00:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8400 to 7372. [2021-08-21 19:00:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7372 states, 7371 states have (on average 2.51661918328585) internal successors, (18550), 7371 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:53,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7372 states to 7372 states and 18550 transitions. [2021-08-21 19:00:53,103 INFO L78 Accepts]: Start accepts. Automaton has 7372 states and 18550 transitions. Word has length 32 [2021-08-21 19:00:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:53,103 INFO L470 AbstractCegarLoop]: Abstraction has 7372 states and 18550 transitions. [2021-08-21 19:00:53,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:53,103 INFO L276 IsEmpty]: Start isEmpty. Operand 7372 states and 18550 transitions. [2021-08-21 19:00:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:53,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:53,114 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:53,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-21 19:00:53,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-08-21 19:00:53,315 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:53,315 INFO L82 PathProgramCache]: Analyzing trace with hash 228215525, now seen corresponding path program 12 times [2021-08-21 19:00:53,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:53,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720970690] [2021-08-21 19:00:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:53,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:53,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:53,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720970690] [2021-08-21 19:00:53,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720970690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:53,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152253634] [2021-08-21 19:00:53,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:00:53,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:53,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:53,448 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:53,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-21 19:00:57,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:00:57,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:00:57,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:00:57,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:00:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:00:57,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152253634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:57,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:00:57,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:00:57,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045491899] [2021-08-21 19:00:57,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:00:57,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:00:57,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:00:57,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:57,394 INFO L87 Difference]: Start difference. First operand 7372 states and 18550 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:57,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:00:57,493 INFO L93 Difference]: Finished difference Result 8496 states and 21088 transitions. [2021-08-21 19:00:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:00:57,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:00:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:00:57,508 INFO L225 Difference]: With dead ends: 8496 [2021-08-21 19:00:57,508 INFO L226 Difference]: Without dead ends: 8489 [2021-08-21 19:00:57,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:00:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8489 states. [2021-08-21 19:00:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8489 to 7582. [2021-08-21 19:00:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.551642263553621) internal successors, (19344), 7581 states have internal predecessors, (19344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 19344 transitions. [2021-08-21 19:00:57,616 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 19344 transitions. Word has length 32 [2021-08-21 19:00:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:00:57,617 INFO L470 AbstractCegarLoop]: Abstraction has 7582 states and 19344 transitions. [2021-08-21 19:00:57,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:00:57,617 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 19344 transitions. [2021-08-21 19:00:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:00:57,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:00:57,627 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:00:57,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2021-08-21 19:00:57,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:57,828 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:00:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:00:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash -916034543, now seen corresponding path program 7 times [2021-08-21 19:00:57,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:00:57,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638005816] [2021-08-21 19:00:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:00:57,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:00:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:00:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:00:57,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:00:57,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638005816] [2021-08-21 19:00:57,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638005816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:00:57,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722657877] [2021-08-21 19:00:57,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:00:57,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:00:57,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:00:57,899 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:00:57,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-21 19:01:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:01,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:01,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:02,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722657877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:02,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:02,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:02,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295264121] [2021-08-21 19:01:02,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:02,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:02,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:02,075 INFO L87 Difference]: Start difference. First operand 7582 states and 19344 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:02,165 INFO L93 Difference]: Finished difference Result 8740 states and 21725 transitions. [2021-08-21 19:01:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:02,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:02,178 INFO L225 Difference]: With dead ends: 8740 [2021-08-21 19:01:02,178 INFO L226 Difference]: Without dead ends: 8733 [2021-08-21 19:01:02,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8733 states. [2021-08-21 19:01:02,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8733 to 7672. [2021-08-21 19:01:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7672 states, 7671 states have (on average 2.563159953070004) internal successors, (19662), 7671 states have internal predecessors, (19662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7672 states to 7672 states and 19662 transitions. [2021-08-21 19:01:02,269 INFO L78 Accepts]: Start accepts. Automaton has 7672 states and 19662 transitions. Word has length 32 [2021-08-21 19:01:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:02,269 INFO L470 AbstractCegarLoop]: Abstraction has 7672 states and 19662 transitions. [2021-08-21 19:01:02,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 7672 states and 19662 transitions. [2021-08-21 19:01:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:02,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:02,279 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:02,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2021-08-21 19:01:02,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:02,480 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:02,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:02,480 INFO L82 PathProgramCache]: Analyzing trace with hash 797407077, now seen corresponding path program 7 times [2021-08-21 19:01:02,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:02,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173864279] [2021-08-21 19:01:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:02,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:02,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:02,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173864279] [2021-08-21 19:01:02,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173864279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:02,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522729237] [2021-08-21 19:01:02,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:01:02,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:02,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:02,547 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:02,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-21 19:01:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:06,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:06,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522729237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:06,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:06,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:06,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330204655] [2021-08-21 19:01:06,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:06,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:06,514 INFO L87 Difference]: Start difference. First operand 7672 states and 19662 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:06,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:06,609 INFO L93 Difference]: Finished difference Result 8944 states and 22194 transitions. [2021-08-21 19:01:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:06,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:06,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:06,623 INFO L225 Difference]: With dead ends: 8944 [2021-08-21 19:01:06,623 INFO L226 Difference]: Without dead ends: 8933 [2021-08-21 19:01:06,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-08-21 19:01:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 7811. [2021-08-21 19:01:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7811 states, 7810 states have (on average 2.5661971830985917) internal successors, (20042), 7810 states have internal predecessors, (20042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7811 states to 7811 states and 20042 transitions. [2021-08-21 19:01:06,752 INFO L78 Accepts]: Start accepts. Automaton has 7811 states and 20042 transitions. Word has length 32 [2021-08-21 19:01:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:06,752 INFO L470 AbstractCegarLoop]: Abstraction has 7811 states and 20042 transitions. [2021-08-21 19:01:06,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:06,752 INFO L276 IsEmpty]: Start isEmpty. Operand 7811 states and 20042 transitions. [2021-08-21 19:01:06,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:06,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:06,765 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:06,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:06,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:06,966 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:06,966 INFO L82 PathProgramCache]: Analyzing trace with hash -961968539, now seen corresponding path program 7 times [2021-08-21 19:01:06,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:06,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525089434] [2021-08-21 19:01:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:06,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:07,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:07,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525089434] [2021-08-21 19:01:07,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525089434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:07,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841837861] [2021-08-21 19:01:07,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:01:07,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:07,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:07,044 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:07,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-21 19:01:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:11,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841837861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:11,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:11,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:11,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672872471] [2021-08-21 19:01:11,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:11,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:11,054 INFO L87 Difference]: Start difference. First operand 7811 states and 20042 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:11,156 INFO L93 Difference]: Finished difference Result 9066 states and 22722 transitions. [2021-08-21 19:01:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:11,172 INFO L225 Difference]: With dead ends: 9066 [2021-08-21 19:01:11,172 INFO L226 Difference]: Without dead ends: 9059 [2021-08-21 19:01:11,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9059 states. [2021-08-21 19:01:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9059 to 8005. [2021-08-21 19:01:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8005 states, 8004 states have (on average 2.5987006496751626) internal successors, (20800), 8004 states have internal predecessors, (20800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8005 states to 8005 states and 20800 transitions. [2021-08-21 19:01:11,287 INFO L78 Accepts]: Start accepts. Automaton has 8005 states and 20800 transitions. Word has length 32 [2021-08-21 19:01:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:11,288 INFO L470 AbstractCegarLoop]: Abstraction has 8005 states and 20800 transitions. [2021-08-21 19:01:11,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:11,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8005 states and 20800 transitions. [2021-08-21 19:01:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:11,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:11,300 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:11,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2021-08-21 19:01:11,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:11,500 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash -160875555, now seen corresponding path program 8 times [2021-08-21 19:01:11,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:11,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250236880] [2021-08-21 19:01:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:11,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:11,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:11,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250236880] [2021-08-21 19:01:11,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250236880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:11,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036835585] [2021-08-21 19:01:11,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:11,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:11,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:11,567 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:11,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-21 19:01:15,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:15,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:15,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:15,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036835585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:15,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:15,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:15,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038209287] [2021-08-21 19:01:15,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:15,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:15,663 INFO L87 Difference]: Start difference. First operand 8005 states and 20800 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:15,768 INFO L93 Difference]: Finished difference Result 9096 states and 23122 transitions. [2021-08-21 19:01:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:15,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:15,783 INFO L225 Difference]: With dead ends: 9096 [2021-08-21 19:01:15,783 INFO L226 Difference]: Without dead ends: 9089 [2021-08-21 19:01:15,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9089 states. [2021-08-21 19:01:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9089 to 8118. [2021-08-21 19:01:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8118 states, 8117 states have (on average 2.6174695084390787) internal successors, (21246), 8117 states have internal predecessors, (21246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8118 states to 8118 states and 21246 transitions. [2021-08-21 19:01:15,889 INFO L78 Accepts]: Start accepts. Automaton has 8118 states and 21246 transitions. Word has length 32 [2021-08-21 19:01:15,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:15,889 INFO L470 AbstractCegarLoop]: Abstraction has 8118 states and 21246 transitions. [2021-08-21 19:01:15,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 8118 states and 21246 transitions. [2021-08-21 19:01:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:15,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:15,901 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:15,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:16,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:16,101 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash 310071009, now seen corresponding path program 13 times [2021-08-21 19:01:16,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:16,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856684048] [2021-08-21 19:01:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:16,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:16,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:16,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856684048] [2021-08-21 19:01:16,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856684048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:16,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162250978] [2021-08-21 19:01:16,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:01:16,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:16,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:16,170 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:16,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-21 19:01:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:20,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:20,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162250978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:20,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:20,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:20,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239436195] [2021-08-21 19:01:20,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:20,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:20,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:20,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:20,245 INFO L87 Difference]: Start difference. First operand 8118 states and 21246 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:20,352 INFO L93 Difference]: Finished difference Result 9085 states and 23216 transitions. [2021-08-21 19:01:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:20,369 INFO L225 Difference]: With dead ends: 9085 [2021-08-21 19:01:20,369 INFO L226 Difference]: Without dead ends: 9078 [2021-08-21 19:01:20,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9078 states. [2021-08-21 19:01:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9078 to 8172. [2021-08-21 19:01:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 8171 states have (on average 2.6236690735528088) internal successors, (21438), 8171 states have internal predecessors, (21438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:20,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 21438 transitions. [2021-08-21 19:01:20,561 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 21438 transitions. Word has length 32 [2021-08-21 19:01:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:20,561 INFO L470 AbstractCegarLoop]: Abstraction has 8172 states and 21438 transitions. [2021-08-21 19:01:20,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:20,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 21438 transitions. [2021-08-21 19:01:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:20,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:20,573 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 19:01:20,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:20,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-08-21 19:01:20,774 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1268218355, now seen corresponding path program 7 times [2021-08-21 19:01:20,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:20,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979433579] [2021-08-21 19:01:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:20,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:20,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:20,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979433579] [2021-08-21 19:01:20,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979433579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:20,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265953871] [2021-08-21 19:01:20,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:01:20,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:20,848 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:20,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-21 19:01:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:24,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:24,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265953871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:24,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:24,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:24,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069495688] [2021-08-21 19:01:24,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:24,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:24,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:24,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:24,919 INFO L87 Difference]: Start difference. First operand 8172 states and 21438 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:25,020 INFO L93 Difference]: Finished difference Result 9310 states and 23737 transitions. [2021-08-21 19:01:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:25,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:25,039 INFO L225 Difference]: With dead ends: 9310 [2021-08-21 19:01:25,039 INFO L226 Difference]: Without dead ends: 9303 [2021-08-21 19:01:25,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:25,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9303 states. [2021-08-21 19:01:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9303 to 8207. [2021-08-21 19:01:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8207 states, 8206 states have (on average 2.628564465025591) internal successors, (21570), 8206 states have internal predecessors, (21570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8207 states to 8207 states and 21570 transitions. [2021-08-21 19:01:25,152 INFO L78 Accepts]: Start accepts. Automaton has 8207 states and 21570 transitions. Word has length 32 [2021-08-21 19:01:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:25,152 INFO L470 AbstractCegarLoop]: Abstraction has 8207 states and 21570 transitions. [2021-08-21 19:01:25,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 8207 states and 21570 transitions. [2021-08-21 19:01:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:25,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:25,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:25,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2021-08-21 19:01:25,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-08-21 19:01:25,366 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash 445223265, now seen corresponding path program 7 times [2021-08-21 19:01:25,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:25,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367817058] [2021-08-21 19:01:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:25,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:25,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:25,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367817058] [2021-08-21 19:01:25,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367817058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:25,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801870724] [2021-08-21 19:01:25,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:01:25,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:25,435 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:25,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-21 19:01:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:29,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:29,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:29,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801870724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:29,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:29,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:29,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116774859] [2021-08-21 19:01:29,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:29,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:29,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:29,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:29,563 INFO L87 Difference]: Start difference. First operand 8207 states and 21570 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:29,659 INFO L93 Difference]: Finished difference Result 9429 states and 23961 transitions. [2021-08-21 19:01:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:29,676 INFO L225 Difference]: With dead ends: 9429 [2021-08-21 19:01:29,676 INFO L226 Difference]: Without dead ends: 9418 [2021-08-21 19:01:29,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9418 states. [2021-08-21 19:01:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9418 to 8254. [2021-08-21 19:01:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8254 states, 8253 states have (on average 2.628135223555071) internal successors, (21690), 8253 states have internal predecessors, (21690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8254 states to 8254 states and 21690 transitions. [2021-08-21 19:01:29,797 INFO L78 Accepts]: Start accepts. Automaton has 8254 states and 21690 transitions. Word has length 32 [2021-08-21 19:01:29,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:29,797 INFO L470 AbstractCegarLoop]: Abstraction has 8254 states and 21690 transitions. [2021-08-21 19:01:29,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 8254 states and 21690 transitions. [2021-08-21 19:01:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:29,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:29,808 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:29,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:30,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-08-21 19:01:30,009 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:30,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1314152351, now seen corresponding path program 7 times [2021-08-21 19:01:30,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:30,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937342531] [2021-08-21 19:01:30,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:30,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:30,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:30,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937342531] [2021-08-21 19:01:30,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937342531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:30,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423330107] [2021-08-21 19:01:30,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:01:30,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:30,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:30,080 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:30,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-21 19:01:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:34,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:34,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:34,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423330107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:34,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:34,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:34,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818610443] [2021-08-21 19:01:34,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:34,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:34,230 INFO L87 Difference]: Start difference. First operand 8254 states and 21690 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:34,333 INFO L93 Difference]: Finished difference Result 9436 states and 24038 transitions. [2021-08-21 19:01:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:34,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:34,349 INFO L225 Difference]: With dead ends: 9436 [2021-08-21 19:01:34,349 INFO L226 Difference]: Without dead ends: 9429 [2021-08-21 19:01:34,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9429 states. [2021-08-21 19:01:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9429 to 8337. [2021-08-21 19:01:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8337 states, 8336 states have (on average 2.6365163147792705) internal successors, (21978), 8336 states have internal predecessors, (21978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8337 states to 8337 states and 21978 transitions. [2021-08-21 19:01:34,467 INFO L78 Accepts]: Start accepts. Automaton has 8337 states and 21978 transitions. Word has length 32 [2021-08-21 19:01:34,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:34,467 INFO L470 AbstractCegarLoop]: Abstraction has 8337 states and 21978 transitions. [2021-08-21 19:01:34,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 8337 states and 21978 transitions. [2021-08-21 19:01:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:34,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:34,480 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:34,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:34,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:34,680 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:34,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:34,680 INFO L82 PathProgramCache]: Analyzing trace with hash -513059367, now seen corresponding path program 8 times [2021-08-21 19:01:34,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:34,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298886077] [2021-08-21 19:01:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:34,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:34,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:34,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298886077] [2021-08-21 19:01:34,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298886077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:34,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051811572] [2021-08-21 19:01:34,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:34,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:34,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:34,750 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:34,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-21 19:01:38,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:38,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:38,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:38,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:01:39,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051811572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:39,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:39,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:39,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583715339] [2021-08-21 19:01:39,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:39,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:39,032 INFO L87 Difference]: Start difference. First operand 8337 states and 21978 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:39,151 INFO L93 Difference]: Finished difference Result 9418 states and 24204 transitions. [2021-08-21 19:01:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:39,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:39,168 INFO L225 Difference]: With dead ends: 9418 [2021-08-21 19:01:39,168 INFO L226 Difference]: Without dead ends: 9411 [2021-08-21 19:01:39,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-08-21 19:01:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 8412. [2021-08-21 19:01:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8412 states, 8411 states have (on average 2.6422541909404353) internal successors, (22224), 8411 states have internal predecessors, (22224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8412 states to 8412 states and 22224 transitions. [2021-08-21 19:01:39,296 INFO L78 Accepts]: Start accepts. Automaton has 8412 states and 22224 transitions. Word has length 32 [2021-08-21 19:01:39,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:39,296 INFO L470 AbstractCegarLoop]: Abstraction has 8412 states and 22224 transitions. [2021-08-21 19:01:39,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 8412 states and 22224 transitions. [2021-08-21 19:01:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:39,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:39,308 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] [2021-08-21 19:01:39,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2021-08-21 19:01:39,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-08-21 19:01:39,508 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:39,508 INFO L82 PathProgramCache]: Analyzing trace with hash 800754141, now seen corresponding path program 8 times [2021-08-21 19:01:39,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:39,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712769353] [2021-08-21 19:01:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:39,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:39,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:39,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712769353] [2021-08-21 19:01:39,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712769353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:39,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051730337] [2021-08-21 19:01:39,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:39,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:39,576 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:39,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-21 19:01:43,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:43,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:43,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:43,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051730337] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:43,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:43,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:43,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770842068] [2021-08-21 19:01:43,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:43,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:43,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:43,675 INFO L87 Difference]: Start difference. First operand 8412 states and 22224 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:43,774 INFO L93 Difference]: Finished difference Result 9432 states and 24182 transitions. [2021-08-21 19:01:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:43,884 INFO L225 Difference]: With dead ends: 9432 [2021-08-21 19:01:43,884 INFO L226 Difference]: Without dead ends: 9425 [2021-08-21 19:01:43,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9425 states. [2021-08-21 19:01:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9425 to 8422. [2021-08-21 19:01:43,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8422 states, 8421 states have (on average 2.643035268970431) internal successors, (22257), 8421 states have internal predecessors, (22257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8422 states to 8422 states and 22257 transitions. [2021-08-21 19:01:43,989 INFO L78 Accepts]: Start accepts. Automaton has 8422 states and 22257 transitions. Word has length 32 [2021-08-21 19:01:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:43,989 INFO L470 AbstractCegarLoop]: Abstraction has 8422 states and 22257 transitions. [2021-08-21 19:01:43,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 8422 states and 22257 transitions. [2021-08-21 19:01:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:44,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:44,001 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 19:01:44,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2021-08-21 19:01:44,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-08-21 19:01:44,202 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:44,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1053432673, now seen corresponding path program 8 times [2021-08-21 19:01:44,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:44,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024461798] [2021-08-21 19:01:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:44,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:44,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:44,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024461798] [2021-08-21 19:01:44,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024461798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:44,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000362909] [2021-08-21 19:01:44,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:44,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:44,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:44,272 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:44,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-21 19:01:48,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:48,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:48,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:48,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:48,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000362909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:48,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:48,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:48,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665549656] [2021-08-21 19:01:48,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:48,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:48,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:48,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:48,382 INFO L87 Difference]: Start difference. First operand 8422 states and 22257 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:48,482 INFO L93 Difference]: Finished difference Result 9369 states and 24047 transitions. [2021-08-21 19:01:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:48,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:48,499 INFO L225 Difference]: With dead ends: 9369 [2021-08-21 19:01:48,499 INFO L226 Difference]: Without dead ends: 9362 [2021-08-21 19:01:48,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9362 states. [2021-08-21 19:01:48,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9362 to 8418. [2021-08-21 19:01:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 2.6425092075561363) internal successors, (22242), 8417 states have internal predecessors, (22242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 22242 transitions. [2021-08-21 19:01:48,696 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 22242 transitions. Word has length 32 [2021-08-21 19:01:48,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:48,696 INFO L470 AbstractCegarLoop]: Abstraction has 8418 states and 22242 transitions. [2021-08-21 19:01:48,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:48,696 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 22242 transitions. [2021-08-21 19:01:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:48,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:48,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:48,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2021-08-21 19:01:48,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:48,908 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1246875829, now seen corresponding path program 1 times [2021-08-21 19:01:48,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:48,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035502748] [2021-08-21 19:01:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:48,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:01:48,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:48,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035502748] [2021-08-21 19:01:48,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035502748] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:01:48,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:01:48,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:01:48,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248686095] [2021-08-21 19:01:48,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:48,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:48,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:48,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:48,976 INFO L87 Difference]: Start difference. First operand 8418 states and 22242 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:49,067 INFO L93 Difference]: Finished difference Result 9821 states and 25035 transitions. [2021-08-21 19:01:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:49,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:49,085 INFO L225 Difference]: With dead ends: 9821 [2021-08-21 19:01:49,085 INFO L226 Difference]: Without dead ends: 9810 [2021-08-21 19:01:49,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-08-21 19:01:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 8592. [2021-08-21 19:01:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8591 states have (on average 2.6371784425561633) internal successors, (22656), 8591 states have internal predecessors, (22656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 22656 transitions. [2021-08-21 19:01:49,217 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 22656 transitions. Word has length 32 [2021-08-21 19:01:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:49,217 INFO L470 AbstractCegarLoop]: Abstraction has 8592 states and 22656 transitions. [2021-08-21 19:01:49,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 22656 transitions. [2021-08-21 19:01:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:49,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:49,230 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:49,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284 [2021-08-21 19:01:49,230 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:49,230 INFO L82 PathProgramCache]: Analyzing trace with hash -512499787, now seen corresponding path program 1 times [2021-08-21 19:01:49,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:49,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611448351] [2021-08-21 19:01:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:49,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:01:49,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:49,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611448351] [2021-08-21 19:01:49,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611448351] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:01:49,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:01:49,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:01:49,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819411276] [2021-08-21 19:01:49,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:49,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:49,298 INFO L87 Difference]: Start difference. First operand 8592 states and 22656 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:49,397 INFO L93 Difference]: Finished difference Result 9898 states and 25223 transitions. [2021-08-21 19:01:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:49,414 INFO L225 Difference]: With dead ends: 9898 [2021-08-21 19:01:49,414 INFO L226 Difference]: Without dead ends: 9891 [2021-08-21 19:01:49,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9891 states. [2021-08-21 19:01:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9891 to 8697. [2021-08-21 19:01:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8697 states, 8696 states have (on average 2.6483440662373505) internal successors, (23030), 8696 states have internal predecessors, (23030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8697 states to 8697 states and 23030 transitions. [2021-08-21 19:01:49,533 INFO L78 Accepts]: Start accepts. Automaton has 8697 states and 23030 transitions. Word has length 32 [2021-08-21 19:01:49,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:49,533 INFO L470 AbstractCegarLoop]: Abstraction has 8697 states and 23030 transitions. [2021-08-21 19:01:49,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:49,534 INFO L276 IsEmpty]: Start isEmpty. Operand 8697 states and 23030 transitions. [2021-08-21 19:01:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:49,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:49,546 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:49,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285 [2021-08-21 19:01:49,546 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:49,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1066330593, now seen corresponding path program 2 times [2021-08-21 19:01:49,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:49,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094996339] [2021-08-21 19:01:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:49,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:49,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:49,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094996339] [2021-08-21 19:01:49,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094996339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:49,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707628050] [2021-08-21 19:01:49,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:01:49,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:49,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:49,614 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:49,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-21 19:01:53,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:01:53,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:53,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:53,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707628050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:53,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:53,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:53,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328153487] [2021-08-21 19:01:53,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:53,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:53,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:53,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:53,880 INFO L87 Difference]: Start difference. First operand 8697 states and 23030 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:53,974 INFO L93 Difference]: Finished difference Result 9854 states and 25277 transitions. [2021-08-21 19:01:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:53,990 INFO L225 Difference]: With dead ends: 9854 [2021-08-21 19:01:53,991 INFO L226 Difference]: Without dead ends: 9847 [2021-08-21 19:01:53,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9847 states. [2021-08-21 19:01:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9847 to 8784. [2021-08-21 19:01:54,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8784 states, 8783 states have (on average 2.646476147102357) internal successors, (23244), 8783 states have internal predecessors, (23244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8784 states to 8784 states and 23244 transitions. [2021-08-21 19:01:54,117 INFO L78 Accepts]: Start accepts. Automaton has 8784 states and 23244 transitions. Word has length 32 [2021-08-21 19:01:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:54,117 INFO L470 AbstractCegarLoop]: Abstraction has 8784 states and 23244 transitions. [2021-08-21 19:01:54,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 8784 states and 23244 transitions. [2021-08-21 19:01:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:54,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:54,131 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] [2021-08-21 19:01:54,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2021-08-21 19:01:54,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:54,331 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1373198879, now seen corresponding path program 1 times [2021-08-21 19:01:54,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:54,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602152342] [2021-08-21 19:01:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:54,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 19:01:54,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:54,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602152342] [2021-08-21 19:01:54,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602152342] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 19:01:54,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 19:01:54,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 19:01:54,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995000860] [2021-08-21 19:01:54,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:54,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:54,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:54,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:54,403 INFO L87 Difference]: Start difference. First operand 8784 states and 23244 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:54,503 INFO L93 Difference]: Finished difference Result 10210 states and 25985 transitions. [2021-08-21 19:01:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:54,520 INFO L225 Difference]: With dead ends: 10210 [2021-08-21 19:01:54,521 INFO L226 Difference]: Without dead ends: 10199 [2021-08-21 19:01:54,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10199 states. [2021-08-21 19:01:54,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10199 to 8937. [2021-08-21 19:01:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8937 states, 8936 states have (on average 2.645702775290958) internal successors, (23642), 8936 states have internal predecessors, (23642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8937 states to 8937 states and 23642 transitions. [2021-08-21 19:01:54,645 INFO L78 Accepts]: Start accepts. Automaton has 8937 states and 23642 transitions. Word has length 32 [2021-08-21 19:01:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:54,645 INFO L470 AbstractCegarLoop]: Abstraction has 8937 states and 23642 transitions. [2021-08-21 19:01:54,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:54,645 INFO L276 IsEmpty]: Start isEmpty. Operand 8937 states and 23642 transitions. [2021-08-21 19:01:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:54,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:54,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:01:54,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287 [2021-08-21 19:01:54,660 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:54,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1420558239, now seen corresponding path program 9 times [2021-08-21 19:01:54,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:54,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365726038] [2021-08-21 19:01:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:54,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:54,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:54,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365726038] [2021-08-21 19:01:54,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365726038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:54,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750017394] [2021-08-21 19:01:54,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:54,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:54,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:54,730 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:54,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-21 19:01:58,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 19:01:58,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:01:58,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:01:58,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:01:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750017394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:59,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:01:59,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:01:59,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321853814] [2021-08-21 19:01:59,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:01:59,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:01:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:01:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:59,025 INFO L87 Difference]: Start difference. First operand 8937 states and 23642 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:59,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:01:59,129 INFO L93 Difference]: Finished difference Result 10197 states and 26192 transitions. [2021-08-21 19:01:59,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:01:59,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:01:59,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:01:59,145 INFO L225 Difference]: With dead ends: 10197 [2021-08-21 19:01:59,145 INFO L226 Difference]: Without dead ends: 10190 [2021-08-21 19:01:59,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:01:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-08-21 19:01:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 9083. [2021-08-21 19:01:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9083 states, 9082 states have (on average 2.6643911032812158) internal successors, (24198), 9082 states have internal predecessors, (24198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9083 states to 9083 states and 24198 transitions. [2021-08-21 19:01:59,282 INFO L78 Accepts]: Start accepts. Automaton has 9083 states and 24198 transitions. Word has length 32 [2021-08-21 19:01:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:01:59,282 INFO L470 AbstractCegarLoop]: Abstraction has 9083 states and 24198 transitions. [2021-08-21 19:01:59,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:01:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9083 states and 24198 transitions. [2021-08-21 19:01:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:01:59,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:01:59,296 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] [2021-08-21 19:01:59,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2021-08-21 19:01:59,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-08-21 19:01:59,497 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:01:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:01:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash 545277789, now seen corresponding path program 9 times [2021-08-21 19:01:59,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:01:59,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665702899] [2021-08-21 19:01:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:01:59,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:01:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:01:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:01:59,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:01:59,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665702899] [2021-08-21 19:01:59,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665702899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:01:59,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028702283] [2021-08-21 19:01:59,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:01:59,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:01:59,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:01:59,565 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:01:59,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-21 19:02:03,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:02:03,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:03,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028702283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:03,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:03,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:03,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364202708] [2021-08-21 19:02:03,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:03,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:03,921 INFO L87 Difference]: Start difference. First operand 9083 states and 24198 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:04,031 INFO L93 Difference]: Finished difference Result 10371 states and 26790 transitions. [2021-08-21 19:02:04,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:04,031 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:04,051 INFO L225 Difference]: With dead ends: 10371 [2021-08-21 19:02:04,051 INFO L226 Difference]: Without dead ends: 10364 [2021-08-21 19:02:04,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10364 states. [2021-08-21 19:02:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10364 to 9245. [2021-08-21 19:02:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9245 states, 9244 states have (on average 2.6769796624837734) internal successors, (24746), 9244 states have internal predecessors, (24746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9245 states to 9245 states and 24746 transitions. [2021-08-21 19:02:04,253 INFO L78 Accepts]: Start accepts. Automaton has 9245 states and 24746 transitions. Word has length 32 [2021-08-21 19:02:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:04,254 INFO L470 AbstractCegarLoop]: Abstraction has 9245 states and 24746 transitions. [2021-08-21 19:02:04,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 9245 states and 24746 transitions. [2021-08-21 19:02:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:04,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:04,268 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:04,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2021-08-21 19:02:04,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-08-21 19:02:04,469 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:04,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1783853479, now seen corresponding path program 2 times [2021-08-21 19:02:04,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:04,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517197016] [2021-08-21 19:02:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:04,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:04,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:04,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517197016] [2021-08-21 19:02:04,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517197016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:04,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305680809] [2021-08-21 19:02:04,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:02:04,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:04,596 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:04,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-21 19:02:08,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:08,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:08,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:08,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305680809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:08,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:08,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:08,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073203002] [2021-08-21 19:02:08,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:08,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:08,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:08,755 INFO L87 Difference]: Start difference. First operand 9245 states and 24746 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:08,867 INFO L93 Difference]: Finished difference Result 10369 states and 26950 transitions. [2021-08-21 19:02:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:08,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:08,887 INFO L225 Difference]: With dead ends: 10369 [2021-08-21 19:02:08,887 INFO L226 Difference]: Without dead ends: 10362 [2021-08-21 19:02:08,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10362 states. [2021-08-21 19:02:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10362 to 9303. [2021-08-21 19:02:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9303 states, 9302 states have (on average 2.686089013115459) internal successors, (24986), 9302 states have internal predecessors, (24986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9303 states to 9303 states and 24986 transitions. [2021-08-21 19:02:09,028 INFO L78 Accepts]: Start accepts. Automaton has 9303 states and 24986 transitions. Word has length 32 [2021-08-21 19:02:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:09,028 INFO L470 AbstractCegarLoop]: Abstraction has 9303 states and 24986 transitions. [2021-08-21 19:02:09,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9303 states and 24986 transitions. [2021-08-21 19:02:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:09,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:09,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:09,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2021-08-21 19:02:09,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:09,242 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 181982549, now seen corresponding path program 2 times [2021-08-21 19:02:09,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:09,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805669971] [2021-08-21 19:02:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:09,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:09,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:09,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805669971] [2021-08-21 19:02:09,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805669971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:09,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15028986] [2021-08-21 19:02:09,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:02:09,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:09,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:09,398 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:09,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-21 19:02:13,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:13,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:13,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:13,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15028986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:13,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:13,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:13,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119069945] [2021-08-21 19:02:13,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:13,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:13,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:13,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:13,583 INFO L87 Difference]: Start difference. First operand 9303 states and 24986 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:13,688 INFO L93 Difference]: Finished difference Result 10514 states and 27385 transitions. [2021-08-21 19:02:13,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:13,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:13,706 INFO L225 Difference]: With dead ends: 10514 [2021-08-21 19:02:13,707 INFO L226 Difference]: Without dead ends: 10507 [2021-08-21 19:02:13,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2021-08-21 19:02:13,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 9405. [2021-08-21 19:02:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9405 states, 9404 states have (on average 2.6956614206720544) internal successors, (25350), 9404 states have internal predecessors, (25350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9405 states to 9405 states and 25350 transitions. [2021-08-21 19:02:13,946 INFO L78 Accepts]: Start accepts. Automaton has 9405 states and 25350 transitions. Word has length 32 [2021-08-21 19:02:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:13,946 INFO L470 AbstractCegarLoop]: Abstraction has 9405 states and 25350 transitions. [2021-08-21 19:02:13,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 9405 states and 25350 transitions. [2021-08-21 19:02:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:13,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:13,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:13,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2021-08-21 19:02:14,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:14,161 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:14,161 INFO L82 PathProgramCache]: Analyzing trace with hash -563850731, now seen corresponding path program 3 times [2021-08-21 19:02:14,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:14,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106468404] [2021-08-21 19:02:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:14,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:14,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:14,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106468404] [2021-08-21 19:02:14,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106468404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:14,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353374573] [2021-08-21 19:02:14,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:14,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:14,235 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:14,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-21 19:02:18,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:02:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:18,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:18,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:18,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353374573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:18,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:18,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:18,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496442437] [2021-08-21 19:02:18,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:18,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:18,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:18,524 INFO L87 Difference]: Start difference. First operand 9405 states and 25350 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:18,753 INFO L93 Difference]: Finished difference Result 10578 states and 27644 transitions. [2021-08-21 19:02:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:18,775 INFO L225 Difference]: With dead ends: 10578 [2021-08-21 19:02:18,775 INFO L226 Difference]: Without dead ends: 10571 [2021-08-21 19:02:18,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10571 states. [2021-08-21 19:02:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10571 to 9440. [2021-08-21 19:02:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9440 states, 9439 states have (on average 2.700497934103189) internal successors, (25490), 9439 states have internal predecessors, (25490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9440 states to 9440 states and 25490 transitions. [2021-08-21 19:02:18,928 INFO L78 Accepts]: Start accepts. Automaton has 9440 states and 25490 transitions. Word has length 32 [2021-08-21 19:02:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:18,928 INFO L470 AbstractCegarLoop]: Abstraction has 9440 states and 25490 transitions. [2021-08-21 19:02:18,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 9440 states and 25490 transitions. [2021-08-21 19:02:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:18,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:18,947 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:18,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2021-08-21 19:02:19,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:19,147 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:19,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:19,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1149590889, now seen corresponding path program 3 times [2021-08-21 19:02:19,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:19,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596600390] [2021-08-21 19:02:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:19,148 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:19,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:19,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596600390] [2021-08-21 19:02:19,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596600390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:19,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631982003] [2021-08-21 19:02:19,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:19,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:19,218 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:19,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-21 19:02:23,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:02:23,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:23,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:23,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:23,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631982003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:23,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:23,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:23,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756639649] [2021-08-21 19:02:23,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:23,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:23,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:23,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:23,510 INFO L87 Difference]: Start difference. First operand 9440 states and 25490 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:23,612 INFO L93 Difference]: Finished difference Result 10709 states and 27927 transitions. [2021-08-21 19:02:23,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:23,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:23,631 INFO L225 Difference]: With dead ends: 10709 [2021-08-21 19:02:23,631 INFO L226 Difference]: Without dead ends: 10698 [2021-08-21 19:02:23,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10698 states. [2021-08-21 19:02:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10698 to 9487. [2021-08-21 19:02:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9487 states, 9486 states have (on average 2.7014547754585707) internal successors, (25626), 9486 states have internal predecessors, (25626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9487 states to 9487 states and 25626 transitions. [2021-08-21 19:02:23,768 INFO L78 Accepts]: Start accepts. Automaton has 9487 states and 25626 transitions. Word has length 32 [2021-08-21 19:02:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:23,768 INFO L470 AbstractCegarLoop]: Abstraction has 9487 states and 25626 transitions. [2021-08-21 19:02:23,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 9487 states and 25626 transitions. [2021-08-21 19:02:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:23,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:23,782 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:23,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2021-08-21 19:02:23,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:23,982 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:23,982 INFO L82 PathProgramCache]: Analyzing trace with hash -609784727, now seen corresponding path program 10 times [2021-08-21 19:02:23,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:23,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361525416] [2021-08-21 19:02:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:23,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:24,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:24,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361525416] [2021-08-21 19:02:24,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361525416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:24,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360319296] [2021-08-21 19:02:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:02:24,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:24,148 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:24,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-21 19:02:28,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:02:28,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:28,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:28,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:28,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360319296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:28,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:28,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:28,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354915750] [2021-08-21 19:02:28,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:28,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:28,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:28,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:28,365 INFO L87 Difference]: Start difference. First operand 9487 states and 25626 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:28,483 INFO L93 Difference]: Finished difference Result 10729 states and 28019 transitions. [2021-08-21 19:02:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:28,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:28,572 INFO L225 Difference]: With dead ends: 10729 [2021-08-21 19:02:28,572 INFO L226 Difference]: Without dead ends: 10722 [2021-08-21 19:02:28,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10722 states. [2021-08-21 19:02:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10722 to 9570. [2021-08-21 19:02:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9570 states, 9569 states have (on average 2.7108370780645834) internal successors, (25940), 9569 states have internal predecessors, (25940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9570 states to 9570 states and 25940 transitions. [2021-08-21 19:02:28,754 INFO L78 Accepts]: Start accepts. Automaton has 9570 states and 25940 transitions. Word has length 32 [2021-08-21 19:02:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:28,754 INFO L470 AbstractCegarLoop]: Abstraction has 9570 states and 25940 transitions. [2021-08-21 19:02:28,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 9570 states and 25940 transitions. [2021-08-21 19:02:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:28,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:28,769 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:28,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2021-08-21 19:02:28,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:28,969 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:28,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1679774367, now seen corresponding path program 11 times [2021-08-21 19:02:28,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:28,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453914317] [2021-08-21 19:02:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:28,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:29,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:29,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453914317] [2021-08-21 19:02:29,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453914317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:29,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146846791] [2021-08-21 19:02:29,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:02:29,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:29,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:29,039 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:29,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-21 19:02:33,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:02:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:33,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:33,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146846791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:33,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:33,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:33,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557660383] [2021-08-21 19:02:33,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:33,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:33,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:33,337 INFO L87 Difference]: Start difference. First operand 9570 states and 25940 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:33,449 INFO L93 Difference]: Finished difference Result 10574 states and 27960 transitions. [2021-08-21 19:02:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:33,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:33,467 INFO L225 Difference]: With dead ends: 10574 [2021-08-21 19:02:33,467 INFO L226 Difference]: Without dead ends: 10567 [2021-08-21 19:02:33,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10567 states. [2021-08-21 19:02:33,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10567 to 9624. [2021-08-21 19:02:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9624 states, 9623 states have (on average 2.718071287540268) internal successors, (26156), 9623 states have internal predecessors, (26156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9624 states to 9624 states and 26156 transitions. [2021-08-21 19:02:33,684 INFO L78 Accepts]: Start accepts. Automaton has 9624 states and 26156 transitions. Word has length 32 [2021-08-21 19:02:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:33,684 INFO L470 AbstractCegarLoop]: Abstraction has 9624 states and 26156 transitions. [2021-08-21 19:02:33,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 9624 states and 26156 transitions. [2021-08-21 19:02:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:33,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:33,697 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:33,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2021-08-21 19:02:33,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:33,898 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:33,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:33,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2091313571, now seen corresponding path program 10 times [2021-08-21 19:02:33,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:33,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057447931] [2021-08-21 19:02:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:33,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:33,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:33,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057447931] [2021-08-21 19:02:33,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057447931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:33,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211731643] [2021-08-21 19:02:33,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:02:33,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:33,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:33,968 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:33,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-21 19:02:38,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:02:38,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:38,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:38,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211731643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:38,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:38,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:38,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083219843] [2021-08-21 19:02:38,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:38,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:38,205 INFO L87 Difference]: Start difference. First operand 9624 states and 26156 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:38,428 INFO L93 Difference]: Finished difference Result 10645 states and 28204 transitions. [2021-08-21 19:02:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:38,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:38,447 INFO L225 Difference]: With dead ends: 10645 [2021-08-21 19:02:38,448 INFO L226 Difference]: Without dead ends: 10638 [2021-08-21 19:02:38,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:38,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10638 states. [2021-08-21 19:02:38,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10638 to 9685. [2021-08-21 19:02:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9685 states, 9684 states have (on average 2.7236679058240396) internal successors, (26376), 9684 states have internal predecessors, (26376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9685 states to 9685 states and 26376 transitions. [2021-08-21 19:02:38,590 INFO L78 Accepts]: Start accepts. Automaton has 9685 states and 26376 transitions. Word has length 32 [2021-08-21 19:02:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:38,590 INFO L470 AbstractCegarLoop]: Abstraction has 9685 states and 26376 transitions. [2021-08-21 19:02:38,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 9685 states and 26376 transitions. [2021-08-21 19:02:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:38,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:38,606 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] [2021-08-21 19:02:38,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:38,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:38,806 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:38,807 INFO L82 PathProgramCache]: Analyzing trace with hash 61324569, now seen corresponding path program 7 times [2021-08-21 19:02:38,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:38,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009178851] [2021-08-21 19:02:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:38,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:38,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:38,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009178851] [2021-08-21 19:02:38,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009178851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:38,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221191892] [2021-08-21 19:02:38,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:02:38,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:38,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:38,879 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:38,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2021-08-21 19:02:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:43,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:43,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221191892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:43,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:43,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:43,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006631122] [2021-08-21 19:02:43,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:43,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:43,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:43,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:43,240 INFO L87 Difference]: Start difference. First operand 9685 states and 26376 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:43,339 INFO L93 Difference]: Finished difference Result 10714 states and 28359 transitions. [2021-08-21 19:02:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:43,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:43,358 INFO L225 Difference]: With dead ends: 10714 [2021-08-21 19:02:43,358 INFO L226 Difference]: Without dead ends: 10707 [2021-08-21 19:02:43,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10707 states. [2021-08-21 19:02:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10707 to 9747. [2021-08-21 19:02:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9747 states, 9746 states have (on average 2.7222450235994256) internal successors, (26531), 9746 states have internal predecessors, (26531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 26531 transitions. [2021-08-21 19:02:43,498 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 26531 transitions. Word has length 32 [2021-08-21 19:02:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:43,498 INFO L470 AbstractCegarLoop]: Abstraction has 9747 states and 26531 transitions. [2021-08-21 19:02:43,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 26531 transitions. [2021-08-21 19:02:43,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:43,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:43,512 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:43,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:43,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:43,713 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:43,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:43,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1774766189, now seen corresponding path program 11 times [2021-08-21 19:02:43,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:43,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126947043] [2021-08-21 19:02:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:43,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:43,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:43,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126947043] [2021-08-21 19:02:43,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126947043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:43,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804849749] [2021-08-21 19:02:43,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:02:43,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:43,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:43,783 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:43,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2021-08-21 19:02:48,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:48,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:48,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:48,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804849749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:48,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:48,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:48,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579405701] [2021-08-21 19:02:48,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:48,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:48,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:48,199 INFO L87 Difference]: Start difference. First operand 9747 states and 26531 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:48,297 INFO L93 Difference]: Finished difference Result 10849 states and 28652 transitions. [2021-08-21 19:02:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:48,317 INFO L225 Difference]: With dead ends: 10849 [2021-08-21 19:02:48,317 INFO L226 Difference]: Without dead ends: 10838 [2021-08-21 19:02:48,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10838 states. [2021-08-21 19:02:48,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10838 to 9821. [2021-08-21 19:02:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9821 states, 9820 states have (on average 2.7181262729124236) internal successors, (26692), 9820 states have internal predecessors, (26692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9821 states to 9821 states and 26692 transitions. [2021-08-21 19:02:48,458 INFO L78 Accepts]: Start accepts. Automaton has 9821 states and 26692 transitions. Word has length 32 [2021-08-21 19:02:48,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:48,458 INFO L470 AbstractCegarLoop]: Abstraction has 9821 states and 26692 transitions. [2021-08-21 19:02:48,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9821 states and 26692 transitions. [2021-08-21 19:02:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:48,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:48,473 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:48,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:48,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-08-21 19:02:48,673 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash 15390573, now seen corresponding path program 7 times [2021-08-21 19:02:48,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:48,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332745019] [2021-08-21 19:02:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:48,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:48,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:48,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332745019] [2021-08-21 19:02:48,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332745019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:48,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175247652] [2021-08-21 19:02:48,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 19:02:48,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:48,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:48,857 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:48,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2021-08-21 19:02:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:52,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:52,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:02:53,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175247652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:53,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:53,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:53,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956362904] [2021-08-21 19:02:53,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:53,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:53,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:53,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:53,121 INFO L87 Difference]: Start difference. First operand 9821 states and 26692 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:53,227 INFO L93 Difference]: Finished difference Result 10896 states and 28702 transitions. [2021-08-21 19:02:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:53,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:53,323 INFO L225 Difference]: With dead ends: 10896 [2021-08-21 19:02:53,324 INFO L226 Difference]: Without dead ends: 10889 [2021-08-21 19:02:53,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10889 states. [2021-08-21 19:02:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10889 to 9855. [2021-08-21 19:02:53,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9855 states, 9854 states have (on average 2.7173736553683785) internal successors, (26777), 9854 states have internal predecessors, (26777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9855 states to 9855 states and 26777 transitions. [2021-08-21 19:02:53,510 INFO L78 Accepts]: Start accepts. Automaton has 9855 states and 26777 transitions. Word has length 32 [2021-08-21 19:02:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:53,510 INFO L470 AbstractCegarLoop]: Abstraction has 9855 states and 26777 transitions. [2021-08-21 19:02:53,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9855 states and 26777 transitions. [2021-08-21 19:02:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:53,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:53,525 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:53,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2021-08-21 19:02:53,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-08-21 19:02:53,726 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:53,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:53,726 INFO L82 PathProgramCache]: Analyzing trace with hash -410435371, now seen corresponding path program 8 times [2021-08-21 19:02:53,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:53,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163824032] [2021-08-21 19:02:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:53,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:53,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:53,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163824032] [2021-08-21 19:02:53,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163824032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:53,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292517689] [2021-08-21 19:02:53,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:02:53,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:53,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:53,796 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:53,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2021-08-21 19:02:57,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 19:02:57,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:02:58,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:02:58,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:02:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:58,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292517689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:58,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:02:58,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:02:58,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044636752] [2021-08-21 19:02:58,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:02:58,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:02:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:02:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:58,133 INFO L87 Difference]: Start difference. First operand 9855 states and 26777 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:02:58,238 INFO L93 Difference]: Finished difference Result 10921 states and 28987 transitions. [2021-08-21 19:02:58,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:02:58,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:02:58,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:02:58,260 INFO L225 Difference]: With dead ends: 10921 [2021-08-21 19:02:58,260 INFO L226 Difference]: Without dead ends: 10914 [2021-08-21 19:02:58,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:02:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states. [2021-08-21 19:02:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10914 to 9927. [2021-08-21 19:02:58,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9927 states, 9926 states have (on average 2.722647592182148) internal successors, (27025), 9926 states have internal predecessors, (27025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9927 states to 9927 states and 27025 transitions. [2021-08-21 19:02:58,493 INFO L78 Accepts]: Start accepts. Automaton has 9927 states and 27025 transitions. Word has length 32 [2021-08-21 19:02:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:02:58,493 INFO L470 AbstractCegarLoop]: Abstraction has 9927 states and 27025 transitions. [2021-08-21 19:02:58,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:02:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 9927 states and 27025 transitions. [2021-08-21 19:02:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:02:58,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:02:58,508 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:02:58,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2021-08-21 19:02:58,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-08-21 19:02:58,708 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:02:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:02:58,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1769860201, now seen corresponding path program 9 times [2021-08-21 19:02:58,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:02:58,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984330926] [2021-08-21 19:02:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:02:58,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:02:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:02:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:02:58,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:02:58,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984330926] [2021-08-21 19:02:58,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984330926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:02:58,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068358160] [2021-08-21 19:02:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:02:58,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:02:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:02:58,782 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:02:58,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2021-08-21 19:03:03,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:03,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:03,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:03:03,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:03,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068358160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:03,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:03,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:03:03,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953212110] [2021-08-21 19:03:03,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:03,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:03,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:03,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:03,255 INFO L87 Difference]: Start difference. First operand 9927 states and 27025 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:03,360 INFO L93 Difference]: Finished difference Result 10904 states and 28979 transitions. [2021-08-21 19:03:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:03,360 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:03,381 INFO L225 Difference]: With dead ends: 10904 [2021-08-21 19:03:03,381 INFO L226 Difference]: Without dead ends: 10897 [2021-08-21 19:03:03,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10897 states. [2021-08-21 19:03:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10897 to 9963. [2021-08-21 19:03:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9962 states have (on average 2.726259787191327) internal successors, (27159), 9962 states have internal predecessors, (27159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:03,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 27159 transitions. [2021-08-21 19:03:03,526 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 27159 transitions. Word has length 32 [2021-08-21 19:03:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:03,527 INFO L470 AbstractCegarLoop]: Abstraction has 9963 states and 27159 transitions. [2021-08-21 19:03:03,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 27159 transitions. [2021-08-21 19:03:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:03,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:03,542 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:03,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2021-08-21 19:03:03,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable301,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:03,742 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:03,742 INFO L82 PathProgramCache]: Analyzing trace with hash -283248807, now seen corresponding path program 9 times [2021-08-21 19:03:03,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:03,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363390864] [2021-08-21 19:03:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:03,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:03,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:03,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363390864] [2021-08-21 19:03:03,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363390864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:03,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259434364] [2021-08-21 19:03:03,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:03,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:03,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:03,812 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:03,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2021-08-21 19:03:08,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:08,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:08,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:03:08,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:08,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259434364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:08,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:08,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:03:08,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334062448] [2021-08-21 19:03:08,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:08,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:08,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:08,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:08,282 INFO L87 Difference]: Start difference. First operand 9963 states and 27159 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:08,398 INFO L93 Difference]: Finished difference Result 11014 states and 29285 transitions. [2021-08-21 19:03:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:08,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:08,419 INFO L225 Difference]: With dead ends: 11014 [2021-08-21 19:03:08,420 INFO L226 Difference]: Without dead ends: 11007 [2021-08-21 19:03:08,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:08,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11007 states. [2021-08-21 19:03:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11007 to 10007. [2021-08-21 19:03:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10007 states, 10006 states have (on average 2.7276634019588246) internal successors, (27293), 10006 states have internal predecessors, (27293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:08,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 27293 transitions. [2021-08-21 19:03:08,568 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 27293 transitions. Word has length 32 [2021-08-21 19:03:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:08,568 INFO L470 AbstractCegarLoop]: Abstraction has 10007 states and 27293 transitions. [2021-08-21 19:03:08,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 27293 transitions. [2021-08-21 19:03:08,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:08,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:08,583 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:08,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2021-08-21 19:03:08,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-08-21 19:03:08,784 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:08,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1062169755, now seen corresponding path program 10 times [2021-08-21 19:03:08,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:08,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009201871] [2021-08-21 19:03:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:08,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:08,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:08,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009201871] [2021-08-21 19:03:08,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009201871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:08,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843707971] [2021-08-21 19:03:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:03:08,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:08,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:08,854 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:08,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2021-08-21 19:03:13,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:03:13,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:03:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:13,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843707971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:13,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:13,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:03:13,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949174247] [2021-08-21 19:03:13,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:13,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:13,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:13,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:13,331 INFO L87 Difference]: Start difference. First operand 10007 states and 27293 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:13,438 INFO L93 Difference]: Finished difference Result 10993 states and 29258 transitions. [2021-08-21 19:03:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:13,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:13,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:13,457 INFO L225 Difference]: With dead ends: 10993 [2021-08-21 19:03:13,457 INFO L226 Difference]: Without dead ends: 10986 [2021-08-21 19:03:13,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10986 states. [2021-08-21 19:03:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10986 to 10043. [2021-08-21 19:03:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10043 states, 10042 states have (on average 2.7304321848237403) internal successors, (27419), 10042 states have internal predecessors, (27419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10043 states to 10043 states and 27419 transitions. [2021-08-21 19:03:13,610 INFO L78 Accepts]: Start accepts. Automaton has 10043 states and 27419 transitions. Word has length 32 [2021-08-21 19:03:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 10043 states and 27419 transitions. [2021-08-21 19:03:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10043 states and 27419 transitions. [2021-08-21 19:03:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:13,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:13,626 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:13,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2021-08-21 19:03:13,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-08-21 19:03:13,827 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:13,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:13,827 INFO L82 PathProgramCache]: Analyzing trace with hash -537621935, now seen corresponding path program 4 times [2021-08-21 19:03:13,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:13,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399979352] [2021-08-21 19:03:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:13,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:13,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:13,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399979352] [2021-08-21 19:03:13,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399979352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:13,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028547342] [2021-08-21 19:03:13,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:03:13,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:13,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:13,896 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:13,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2021-08-21 19:03:18,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:03:18,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:03:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:18,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028547342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:18,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:18,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:03:18,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793830238] [2021-08-21 19:03:18,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:18,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:18,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:18,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:18,413 INFO L87 Difference]: Start difference. First operand 10043 states and 27419 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:18,518 INFO L93 Difference]: Finished difference Result 11101 states and 29544 transitions. [2021-08-21 19:03:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:18,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:18,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:18,536 INFO L225 Difference]: With dead ends: 11101 [2021-08-21 19:03:18,536 INFO L226 Difference]: Without dead ends: 11094 [2021-08-21 19:03:18,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11094 states. [2021-08-21 19:03:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11094 to 10087. [2021-08-21 19:03:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10087 states, 10086 states have (on average 2.733392821733095) internal successors, (27569), 10086 states have internal predecessors, (27569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10087 states to 10087 states and 27569 transitions. [2021-08-21 19:03:18,681 INFO L78 Accepts]: Start accepts. Automaton has 10087 states and 27569 transitions. Word has length 32 [2021-08-21 19:03:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:18,681 INFO L470 AbstractCegarLoop]: Abstraction has 10087 states and 27569 transitions. [2021-08-21 19:03:18,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 10087 states and 27569 transitions. [2021-08-21 19:03:18,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:18,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:18,698 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] [2021-08-21 19:03:18,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2021-08-21 19:03:18,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-08-21 19:03:18,898 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:18,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:18,899 INFO L82 PathProgramCache]: Analyzing trace with hash 306922861, now seen corresponding path program 5 times [2021-08-21 19:03:18,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:18,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748352151] [2021-08-21 19:03:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:18,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:19,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:19,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748352151] [2021-08-21 19:03:19,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748352151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:19,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813033794] [2021-08-21 19:03:19,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:03:19,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:19,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:19,080 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:19,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2021-08-21 19:03:23,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:03:23,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:23,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:03:23,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 19:03:23,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813033794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:23,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:23,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:03:23,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625121209] [2021-08-21 19:03:23,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:23,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:23,578 INFO L87 Difference]: Start difference. First operand 10087 states and 27569 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:23,690 INFO L93 Difference]: Finished difference Result 11076 states and 29530 transitions. [2021-08-21 19:03:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:23,712 INFO L225 Difference]: With dead ends: 11076 [2021-08-21 19:03:23,713 INFO L226 Difference]: Without dead ends: 11069 [2021-08-21 19:03:23,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11069 states. [2021-08-21 19:03:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11069 to 10123. [2021-08-21 19:03:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10123 states, 10122 states have (on average 2.737700059276823) internal successors, (27711), 10122 states have internal predecessors, (27711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10123 states to 10123 states and 27711 transitions. [2021-08-21 19:03:23,867 INFO L78 Accepts]: Start accepts. Automaton has 10123 states and 27711 transitions. Word has length 32 [2021-08-21 19:03:23,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:23,867 INFO L470 AbstractCegarLoop]: Abstraction has 10123 states and 27711 transitions. [2021-08-21 19:03:23,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:23,867 INFO L276 IsEmpty]: Start isEmpty. Operand 10123 states and 27711 transitions. [2021-08-21 19:03:23,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:23,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:23,883 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:23,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:24,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-08-21 19:03:24,083 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:24,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:24,083 INFO L82 PathProgramCache]: Analyzing trace with hash 70858021, now seen corresponding path program 3 times [2021-08-21 19:03:24,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:24,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376139325] [2021-08-21 19:03:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:24,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:24,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:24,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376139325] [2021-08-21 19:03:24,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376139325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:24,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164940778] [2021-08-21 19:03:24,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 19:03:24,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:24,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:24,155 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:24,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2021-08-21 19:03:28,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 19:03:28,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:28,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:03:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:28,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164940778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:28,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:28,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:03:28,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305084116] [2021-08-21 19:03:28,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:28,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:28,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:28,711 INFO L87 Difference]: Start difference. First operand 10123 states and 27711 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:28,818 INFO L93 Difference]: Finished difference Result 11278 states and 29991 transitions. [2021-08-21 19:03:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:28,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:28,841 INFO L225 Difference]: With dead ends: 11278 [2021-08-21 19:03:28,841 INFO L226 Difference]: Without dead ends: 11271 [2021-08-21 19:03:28,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11271 states. [2021-08-21 19:03:28,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11271 to 10158. [2021-08-21 19:03:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 10157 states have (on average 2.740474549571724) internal successors, (27835), 10157 states have internal predecessors, (27835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 27835 transitions. [2021-08-21 19:03:28,999 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 27835 transitions. Word has length 32 [2021-08-21 19:03:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:28,999 INFO L470 AbstractCegarLoop]: Abstraction has 10158 states and 27835 transitions. [2021-08-21 19:03:28,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 27835 transitions. [2021-08-21 19:03:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:29,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:29,014 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:29,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2021-08-21 19:03:29,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:29,215 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:29,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:29,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1784299641, now seen corresponding path program 10 times [2021-08-21 19:03:29,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:29,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220898576] [2021-08-21 19:03:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:29,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:29,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:29,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220898576] [2021-08-21 19:03:29,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220898576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:29,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577166808] [2021-08-21 19:03:29,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 19:03:29,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:29,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:29,288 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:29,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2021-08-21 19:03:33,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 19:03:33,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:33,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:03:33,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:33,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577166808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:33,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:33,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:03:33,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829426724] [2021-08-21 19:03:33,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:33,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:33,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:33,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:33,841 INFO L87 Difference]: Start difference. First operand 10158 states and 27835 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:33,940 INFO L93 Difference]: Finished difference Result 11415 states and 30256 transitions. [2021-08-21 19:03:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:33,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:33,962 INFO L225 Difference]: With dead ends: 11415 [2021-08-21 19:03:33,962 INFO L226 Difference]: Without dead ends: 11404 [2021-08-21 19:03:33,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:33,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2021-08-21 19:03:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 10205. [2021-08-21 19:03:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 2.73843590748726) internal successors, (27943), 10204 states have internal predecessors, (27943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 27943 transitions. [2021-08-21 19:03:34,118 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 27943 transitions. Word has length 32 [2021-08-21 19:03:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:34,118 INFO L470 AbstractCegarLoop]: Abstraction has 10205 states and 27943 transitions. [2021-08-21 19:03:34,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 27943 transitions. [2021-08-21 19:03:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:34,134 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:34,134 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:34,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2021-08-21 19:03:34,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-08-21 19:03:34,334 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:34,335 INFO L82 PathProgramCache]: Analyzing trace with hash 24924025, now seen corresponding path program 6 times [2021-08-21 19:03:34,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:34,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723642230] [2021-08-21 19:03:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:34,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:34,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:34,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723642230] [2021-08-21 19:03:34,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723642230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:34,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942462306] [2021-08-21 19:03:34,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 19:03:34,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:34,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:34,406 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:34,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2021-08-21 19:03:38,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 19:03:38,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:38,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:03:38,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:38,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942462306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:38,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:38,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:03:38,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053497297] [2021-08-21 19:03:38,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:38,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:38,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:38,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:38,974 INFO L87 Difference]: Start difference. First operand 10205 states and 27943 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:39,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:39,077 INFO L93 Difference]: Finished difference Result 11399 states and 30235 transitions. [2021-08-21 19:03:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:39,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:39,097 INFO L225 Difference]: With dead ends: 11399 [2021-08-21 19:03:39,097 INFO L226 Difference]: Without dead ends: 11392 [2021-08-21 19:03:39,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11392 states. [2021-08-21 19:03:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11392 to 10253. [2021-08-21 19:03:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 2.743757315645728) internal successors, (28129), 10252 states have internal predecessors, (28129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 28129 transitions. [2021-08-21 19:03:39,251 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 28129 transitions. Word has length 32 [2021-08-21 19:03:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:39,251 INFO L470 AbstractCegarLoop]: Abstraction has 10253 states and 28129 transitions. [2021-08-21 19:03:39,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 28129 transitions. [2021-08-21 19:03:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:39,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:39,268 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 19:03:39,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2021-08-21 19:03:39,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:39,469 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1470198507, now seen corresponding path program 11 times [2021-08-21 19:03:39,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:39,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799821253] [2021-08-21 19:03:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:39,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:39,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:39,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799821253] [2021-08-21 19:03:39,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799821253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:39,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076405847] [2021-08-21 19:03:39,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 19:03:39,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:39,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:39,544 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:39,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2021-08-21 19:03:44,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 19:03:44,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 19:03:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 19:03:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 19:03:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:44,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076405847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:44,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 19:03:44,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 19:03:44,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716637385] [2021-08-21 19:03:44,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 19:03:44,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 19:03:44,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 19:03:44,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:44,138 INFO L87 Difference]: Start difference. First operand 10253 states and 28129 transitions. Second operand has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 19:03:44,237 INFO L93 Difference]: Finished difference Result 11218 states and 29989 transitions. [2021-08-21 19:03:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 19:03:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 19:03:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 19:03:44,260 INFO L225 Difference]: With dead ends: 11218 [2021-08-21 19:03:44,260 INFO L226 Difference]: Without dead ends: 11211 [2021-08-21 19:03:44,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 19:03:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11211 states. [2021-08-21 19:03:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11211 to 10294. [2021-08-21 19:03:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10294 states, 10293 states have (on average 2.743806470416788) internal successors, (28242), 10293 states have internal predecessors, (28242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10294 states to 10294 states and 28242 transitions. [2021-08-21 19:03:44,423 INFO L78 Accepts]: Start accepts. Automaton has 10294 states and 28242 transitions. Word has length 32 [2021-08-21 19:03:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 19:03:44,423 INFO L470 AbstractCegarLoop]: Abstraction has 10294 states and 28242 transitions. [2021-08-21 19:03:44,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 19:03:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10294 states and 28242 transitions. [2021-08-21 19:03:44,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 19:03:44,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 19:03:44,438 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] [2021-08-21 19:03:44,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2021-08-21 19:03:44,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-08-21 19:03:44,639 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-08-21 19:03:44,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 19:03:44,639 INFO L82 PathProgramCache]: Analyzing trace with hash 243243113, now seen corresponding path program 8 times [2021-08-21 19:03:44,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 19:03:44,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517460474] [2021-08-21 19:03:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 19:03:44,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 19:03:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 19:03:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 19:03:44,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 19:03:44,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517460474] [2021-08-21 19:03:44,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517460474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 19:03:44,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130256718] [2021-08-21 19:03:44,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 19:03:44,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 19:03:44,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 19:03:44,710 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 19:03:44,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 19:03:47,609 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 19:03:47,609 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 19:03:48,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Ended with exit code 0 [2021-08-21 19:03:48,645 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 19:03:48,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310 [2021-08-21 19:03:48,645 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 1,while executing Executor. [2021-08-21 19:03:48,646 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 19:03:48,646 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 19:03:48,646 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 19:03:48,646 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-21 19:03:48,646 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4INUSE_VIOLATION [2021-08-21 19:03:48,646 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5INUSE_VIOLATION [2021-08-21 19:03:48,649 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 19:03:48,649 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 19:03:48,651 INFO L202 PluginConnector]: Adding new model add-sub06.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:03:48 BasicIcfg [2021-08-21 19:03:48,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 19:03:48,653 INFO L168 Benchmark]: Toolchain (without parser) took 718828.12 ms. Allocated memory was 191.9 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 172.0 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-08-21 19:03:48,653 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 173.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 19:03:48,653 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.57 ms. Allocated memory is still 191.9 MB. Free memory was 171.9 MB in the beginning and 170.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:48,654 INFO L168 Benchmark]: Boogie Preprocessor took 12.16 ms. Allocated memory is still 191.9 MB. Free memory was 170.5 MB in the beginning and 169.5 MB in the end (delta: 934.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:48,654 INFO L168 Benchmark]: RCFGBuilder took 191.93 ms. Allocated memory is still 191.9 MB. Free memory was 169.4 MB in the beginning and 160.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-08-21 19:03:48,656 INFO L168 Benchmark]: TraceAbstraction took 718599.03 ms. Allocated memory was 191.9 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 159.7 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.5 GB. Max. memory is 8.0 GB. [2021-08-21 19:03:48,657 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 0.13 ms. Allocated memory is still 191.9 MB. Free memory is still 173.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.57 ms. Allocated memory is still 191.9 MB. Free memory was 171.9 MB in the beginning and 170.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.16 ms. Allocated memory is still 191.9 MB. Free memory was 170.5 MB in the beginning and 169.5 MB in the end (delta: 934.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 191.93 ms. Allocated memory is still 191.9 MB. Free memory was 169.4 MB in the beginning and 160.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 718599.03 ms. Allocated memory was 191.9 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 159.7 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.5 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: 41570, positive: 39752, positive conditional: 39752, positive unconditional: 0, negative: 1818, negative conditional: 1818, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 39752, positive: 39752, positive conditional: 0, positive unconditional: 39752, 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: 360, positive: 360, positive conditional: 0, positive unconditional: 360, 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: 360, positive: 300, positive conditional: 0, positive unconditional: 300, negative: 60, negative conditional: 0, negative unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 60, positive: 60, positive conditional: 0, positive unconditional: 60, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 142, positive: 142, positive conditional: 0, positive unconditional: 142, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 39752, positive: 39392, positive conditional: 0, positive unconditional: 39392, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 360, unknown conditional: 0, unknown unconditional: 360] , Statistics on independence cache: Total cache size (in pairs): 360, Positive cache size: 360, Positive conditional cache size: 0, Positive unconditional cache size: 360, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 1818 - 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: 22]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 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 33 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 33 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 33 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 33 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 33 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 33 with TraceHistMax 1,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 8 procedures, 51 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 718478.6ms, OverallIterations: 311, TraceHistogramMax: 2, EmptinessCheckTime: 2385.1ms, AutomataDifference: 27800.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 579.5ms, PartialOrderReductionTime: 569.7ms, HoareTripleCheckerStatistics: 12014 SDtfs, 3405 SDslu, 36320 SDs, 0 SdLazy, 40038 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13620.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9826 GetRequests, 7929 SyntacticMatches, 564 SemanticMatches, 1333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6373.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10294occurred in iteration=310, InterpolantAutomatonStates: 1953, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22998.3ms AutomataMinimizationTime, 310 MinimizatonAttempts, 223083 StatesRemovedByMinimization, 310 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1170.5ms SsaConstructionTime, 3841.3ms SatisfiabilityAnalysisTime, 48037.9ms InterpolantComputationTime, 16994 NumberOfCodeBlocks, 16994 NumberOfCodeBlocksAsserted, 831 NumberOfCheckSat, 16429 ConstructedInterpolants, 0 QuantifiedInterpolants, 118587 SizeOfPredicates, 0 NumberOfNonLiveVariables, 28600 ConjunctsInSsa, 4265 ConjunctsInUnsatCore, 565 InterpolantComputations, 55 PerfectInterpolantSequences, 1208/2312 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