/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Overflow-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 19:21:09,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 19:21:09,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 19:21:09,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 19:21:09,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 19:21:09,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 19:21:09,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 19:21:09,653 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 19:21:09,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 19:21:09,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 19:21:09,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 19:21:09,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 19:21:09,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 19:21:09,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 19:21:09,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 19:21:09,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 19:21:09,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 19:21:09,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 19:21:09,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 19:21:09,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 19:21:09,686 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-10-13 19:21:09,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 19:21:09,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 19:21:09,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 19:21:09,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 19:21:09,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 19:21:09,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 19:21:09,721 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 19:21:09,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 19:21:09,722 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 19:21:09,722 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 19:21:09,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 19:21:09,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 19:21:09,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 19:21:09,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 19:21:09,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 19:21:09,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 19:21:09,724 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-13 19:21:09,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 19:21:09,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 19:21:09,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 19:21:09,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 19:21:09,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 19:21:09,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 19:21:09,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 19:21:09,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:21:09,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 19:21:09,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 19:21:09,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 19:21:09,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 19:21:09,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 19:21:09,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 19:21:09,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 19:21:09,727 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 19:21:10,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 19:21:10,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 19:21:10,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 19:21:10,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 19:21:10,126 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 19:21:10,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-10-13 19:21:10,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/806e43f22/80efa350ed1d41c489735714812b1d1f/FLAGcab73fa92 [2021-10-13 19:21:10,931 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 19:21:10,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-10-13 19:21:10,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/806e43f22/80efa350ed1d41c489735714812b1d1f/FLAGcab73fa92 [2021-10-13 19:21:11,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/806e43f22/80efa350ed1d41c489735714812b1d1f [2021-10-13 19:21:11,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 19:21:11,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 19:21:11,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 19:21:11,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 19:21:11,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 19:21:11,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb58a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11, skipping insertion in model container [2021-10-13 19:21:11,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 19:21:11,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 19:21:11,599 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2469,2482] [2021-10-13 19:21:11,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:21:11,625 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 19:21:11,653 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2469,2482] [2021-10-13 19:21:11,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:21:11,677 INFO L208 MainTranslator]: Completed translation [2021-10-13 19:21:11,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11 WrapperNode [2021-10-13 19:21:11,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 19:21:11,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 19:21:11,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 19:21:11,685 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 19:21:11,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 19:21:11,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 19:21:11,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 19:21:11,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 19:21:11,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 19:21:11,862 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 19:21:11,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 19:21:11,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 19:21:11,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (1/1) ... [2021-10-13 19:21:11,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:21:11,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:11,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 19:21:11,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 19:21:11,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 19:21:11,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 19:21:11,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 19:21:11,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 19:21:11,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 19:21:11,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 19:21:11,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 19:21:11,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 19:21:11,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 19:21:11,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 19:21:11,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 19:21:11,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 19:21:11,995 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-13 19:21:12,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 19:21:12,473 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-13 19:21:12,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:21:12 BoogieIcfgContainer [2021-10-13 19:21:12,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 19:21:12,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 19:21:12,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 19:21:12,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 19:21:12,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:21:11" (1/3) ... [2021-10-13 19:21:12,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660752aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:21:12, skipping insertion in model container [2021-10-13 19:21:12,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11" (2/3) ... [2021-10-13 19:21:12,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660752aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:21:12, skipping insertion in model container [2021-10-13 19:21:12,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:21:12" (3/3) ... [2021-10-13 19:21:12,484 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2021-10-13 19:21:12,490 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-13 19:21:12,491 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 19:21:12,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-13 19:21:12,491 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 19:21:12,529 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,530 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,530 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,530 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,530 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,531 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,531 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,531 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,531 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,531 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,532 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,532 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,532 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,532 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,533 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,533 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,533 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,533 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,534 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,534 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,534 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,534 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,534 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,535 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,535 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,535 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,535 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,535 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,536 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,536 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,536 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,536 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,537 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,537 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,537 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,537 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,539 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,539 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,539 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,539 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,540 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,540 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,540 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,540 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,540 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,541 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,541 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,541 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,541 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,541 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,542 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,542 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,542 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,542 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,543 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,543 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,543 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,543 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,543 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,544 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,544 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,544 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,544 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,545 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,545 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,545 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,545 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,545 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,546 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,546 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,546 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,546 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,547 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,547 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,547 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,547 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,547 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,548 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,548 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,549 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,549 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,549 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,550 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,550 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,550 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,550 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,550 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,551 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,551 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,551 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,551 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,552 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,552 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,552 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,552 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,552 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,553 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,553 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,553 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,553 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,553 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,554 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,554 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,554 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,554 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,554 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,555 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,556 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,557 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,558 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,558 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,558 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,558 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,558 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,559 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,559 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,559 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,559 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,559 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,560 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,563 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,569 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~flag~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,570 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,571 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:21:12,578 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-13 19:21:12,627 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 19:21:12,633 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 [2021-10-13 19:21:12,634 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-13 19:21:12,654 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 19:21:12,668 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 168 transitions, 352 flow [2021-10-13 19:21:12,672 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 168 transitions, 352 flow [2021-10-13 19:21:12,674 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 161 places, 168 transitions, 352 flow [2021-10-13 19:21:12,807 INFO L129 PetriNetUnfolder]: 14/166 cut-off events. [2021-10-13 19:21:12,807 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-13 19:21:12,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 166 events. 14/166 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 259 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 98. Up to 2 conditions per place. [2021-10-13 19:21:12,829 INFO L116 LiptonReduction]: Number of co-enabled transitions 3476 [2021-10-13 19:21:21,503 INFO L131 LiptonReduction]: Checked pairs total: 4152 [2021-10-13 19:21:21,503 INFO L133 LiptonReduction]: Total number of compositions: 201 [2021-10-13 19:21:21,539 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-10-13 19:21:21,587 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 85 states have (on average 3.0470588235294116) internal successors, (259), 110 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 85 states have (on average 3.0470588235294116) internal successors, (259), 110 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 19:21:21,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:21,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 19:21:21,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash 22393, now seen corresponding path program 1 times [2021-10-13 19:21:21,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:21,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551669084] [2021-10-13 19:21:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:21,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:21,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:21,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551669084] [2021-10-13 19:21:21,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551669084] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:21:21,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:21:21,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 19:21:21,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562733736] [2021-10-13 19:21:22,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:21:22,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:21:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:21:22,031 INFO L87 Difference]: Start difference. First operand has 111 states, 85 states have (on average 3.0470588235294116) internal successors, (259), 110 states have internal predecessors, (259), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:22,076 INFO L93 Difference]: Finished difference Result 139 states and 321 transitions. [2021-10-13 19:21:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:21:22,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-13 19:21:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:22,092 INFO L225 Difference]: With dead ends: 139 [2021-10-13 19:21:22,092 INFO L226 Difference]: Without dead ends: 139 [2021-10-13 19:21:22,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:21:22,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-13 19:21:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 72. [2021-10-13 19:21:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 59 states have (on average 2.7796610169491527) internal successors, (164), 71 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 164 transitions. [2021-10-13 19:21:22,143 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 164 transitions. Word has length 2 [2021-10-13 19:21:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:22,144 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 164 transitions. [2021-10-13 19:21:22,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 164 transitions. [2021-10-13 19:21:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:21:22,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:22,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:21:22,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 19:21:22,145 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:22,146 INFO L82 PathProgramCache]: Analyzing trace with hash 696209, now seen corresponding path program 1 times [2021-10-13 19:21:22,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:22,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811610600] [2021-10-13 19:21:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:22,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:22,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:22,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811610600] [2021-10-13 19:21:22,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811610600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:22,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025009000] [2021-10-13 19:21:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:22,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:22,208 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:22,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 19:21:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:22,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:21:22,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:22,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025009000] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:21:22,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:21:22,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2021-10-13 19:21:22,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194068446] [2021-10-13 19:21:22,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:21:22,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:21:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:21:22,337 INFO L87 Difference]: Start difference. First operand 72 states and 164 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:22,365 INFO L93 Difference]: Finished difference Result 138 states and 320 transitions. [2021-10-13 19:21:22,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:21:22,366 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 19:21:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:22,369 INFO L225 Difference]: With dead ends: 138 [2021-10-13 19:21:22,369 INFO L226 Difference]: Without dead ends: 138 [2021-10-13 19:21:22,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:21:22,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-13 19:21:22,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 71. [2021-10-13 19:21:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 2.76271186440678) internal successors, (163), 70 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 163 transitions. [2021-10-13 19:21:22,384 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 163 transitions. Word has length 3 [2021-10-13 19:21:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:22,385 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 163 transitions. [2021-10-13 19:21:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 163 transitions. [2021-10-13 19:21:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:21:22,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:22,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:21:22,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:22,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:22,601 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:22,601 INFO L82 PathProgramCache]: Analyzing trace with hash 696210, now seen corresponding path program 1 times [2021-10-13 19:21:22,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:22,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604154718] [2021-10-13 19:21:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:22,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:22,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:22,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604154718] [2021-10-13 19:21:22,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604154718] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:22,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279120077] [2021-10-13 19:21:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:22,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:22,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:22,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:22,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 19:21:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:21:22,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:22,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279120077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:22,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:22,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-13 19:21:22,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623128830] [2021-10-13 19:21:22,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 19:21:22,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:22,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 19:21:22,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:21:22,877 INFO L87 Difference]: Start difference. First operand 71 states and 163 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:22,905 INFO L93 Difference]: Finished difference Result 206 states and 479 transitions. [2021-10-13 19:21:22,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:21:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 19:21:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:22,909 INFO L225 Difference]: With dead ends: 206 [2021-10-13 19:21:22,910 INFO L226 Difference]: Without dead ends: 206 [2021-10-13 19:21:22,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:21:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-13 19:21:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 72. [2021-10-13 19:21:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 2.75) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-13 19:21:22,924 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 3 [2021-10-13 19:21:22,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:22,925 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-13 19:21:22,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:22,926 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-13 19:21:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 19:21:22,926 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:22,926 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 19:21:22,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:23,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:23,141 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash 21573254, now seen corresponding path program 1 times [2021-10-13 19:21:23,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:23,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315890270] [2021-10-13 19:21:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:23,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:23,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:23,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315890270] [2021-10-13 19:21:23,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315890270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:21:23,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:21:23,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 19:21:23,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768049189] [2021-10-13 19:21:23,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:21:23,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:23,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:21:23,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:21:23,229 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:23,255 INFO L93 Difference]: Finished difference Result 80 states and 173 transitions. [2021-10-13 19:21:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:21:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 19:21:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:23,258 INFO L225 Difference]: With dead ends: 80 [2021-10-13 19:21:23,258 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 19:21:23,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:21:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 19:21:23,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2021-10-13 19:21:23,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 2.759259259259259) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 149 transitions. [2021-10-13 19:21:23,273 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 149 transitions. Word has length 4 [2021-10-13 19:21:23,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:23,273 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 149 transitions. [2021-10-13 19:21:23,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 149 transitions. [2021-10-13 19:21:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 19:21:23,275 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:23,276 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-13 19:21:23,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 19:21:23,278 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:23,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:23,279 INFO L82 PathProgramCache]: Analyzing trace with hash 21584506, now seen corresponding path program 2 times [2021-10-13 19:21:23,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:23,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715720515] [2021-10-13 19:21:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:23,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:23,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:23,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715720515] [2021-10-13 19:21:23,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715720515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:23,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393989431] [2021-10-13 19:21:23,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:21:23,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:23,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:23,336 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:23,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 19:21:23,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 19:21:23,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:21:23,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:21:23,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393989431] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:21:23,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:21:23,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2021-10-13 19:21:23,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349598164] [2021-10-13 19:21:23,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:21:23,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:21:23,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:21:23,408 INFO L87 Difference]: Start difference. First operand 66 states and 149 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:23,413 INFO L93 Difference]: Finished difference Result 65 states and 148 transitions. [2021-10-13 19:21:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:21:23,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 19:21:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:23,415 INFO L225 Difference]: With dead ends: 65 [2021-10-13 19:21:23,415 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 19:21:23,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:21:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 19:21:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-10-13 19:21:23,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 2.769230769230769) internal successors, (144), 62 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 144 transitions. [2021-10-13 19:21:23,422 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 144 transitions. Word has length 4 [2021-10-13 19:21:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:23,423 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 144 transitions. [2021-10-13 19:21:23,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 144 transitions. [2021-10-13 19:21:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 19:21:23,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:23,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:23,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:23,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:23,639 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:23,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1557637383, now seen corresponding path program 1 times [2021-10-13 19:21:23,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:23,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177070623] [2021-10-13 19:21:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:23,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:23,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:23,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177070623] [2021-10-13 19:21:23,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177070623] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:21:23,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:21:23,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 19:21:23,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765824556] [2021-10-13 19:21:23,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:21:23,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:21:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:21:23,769 INFO L87 Difference]: Start difference. First operand 63 states and 144 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:23,827 INFO L93 Difference]: Finished difference Result 81 states and 171 transitions. [2021-10-13 19:21:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:21:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 19:21:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:23,868 INFO L225 Difference]: With dead ends: 81 [2021-10-13 19:21:23,868 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 19:21:23,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:21:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 19:21:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-13 19:21:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 145 transitions. [2021-10-13 19:21:23,881 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 145 transitions. Word has length 7 [2021-10-13 19:21:23,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:23,882 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 145 transitions. [2021-10-13 19:21:23,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:23,882 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 145 transitions. [2021-10-13 19:21:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 19:21:23,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:23,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:23,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 19:21:23,888 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:23,889 INFO L82 PathProgramCache]: Analyzing trace with hash 524246497, now seen corresponding path program 1 times [2021-10-13 19:21:23,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:23,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545982038] [2021-10-13 19:21:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:23,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:24,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:24,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545982038] [2021-10-13 19:21:24,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545982038] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:24,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217125275] [2021-10-13 19:21:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:24,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:24,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:24,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:24,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 19:21:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:24,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:21:24,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:21:24,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217125275] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:21:24,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:21:24,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2021-10-13 19:21:24,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967586171] [2021-10-13 19:21:24,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:21:24,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:21:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:21:24,122 INFO L87 Difference]: Start difference. First operand 64 states and 145 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:24,135 INFO L93 Difference]: Finished difference Result 32 states and 67 transitions. [2021-10-13 19:21:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:21:24,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 19:21:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:24,137 INFO L225 Difference]: With dead ends: 32 [2021-10-13 19:21:24,137 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 19:21:24,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:21:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 19:21:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-13 19:21:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 43 transitions. [2021-10-13 19:21:24,140 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 43 transitions. Word has length 8 [2021-10-13 19:21:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:24,141 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 43 transitions. [2021-10-13 19:21:24,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 43 transitions. [2021-10-13 19:21:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:21:24,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:24,142 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:24,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:24,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:24,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:24,358 INFO L82 PathProgramCache]: Analyzing trace with hash -928226926, now seen corresponding path program 1 times [2021-10-13 19:21:24,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:24,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110715335] [2021-10-13 19:21:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:24,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:24,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:24,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:24,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110715335] [2021-10-13 19:21:24,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110715335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:24,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754702001] [2021-10-13 19:21:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:24,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:24,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:24,791 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:24,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 19:21:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:24,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 19:21:24,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:24,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:21:24,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-10-13 19:21:25,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-13 19:21:25,141 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:21:25,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-13 19:21:25,258 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:21:25,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-10-13 19:21:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:25,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754702001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:25,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:25,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:21:25,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865726748] [2021-10-13 19:21:25,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:21:25,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:21:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:21:25,716 INFO L87 Difference]: Start difference. First operand 22 states and 43 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:26,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:26,512 INFO L93 Difference]: Finished difference Result 50 states and 104 transitions. [2021-10-13 19:21:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:21:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 19:21:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:26,513 INFO L225 Difference]: With dead ends: 50 [2021-10-13 19:21:26,513 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 19:21:26,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 719.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:21:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 19:21:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-10-13 19:21:26,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2021-10-13 19:21:26,522 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 9 [2021-10-13 19:21:26,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:26,523 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2021-10-13 19:21:26,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2021-10-13 19:21:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:21:26,524 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:26,525 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:26,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:26,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:26,738 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:26,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1289737065, now seen corresponding path program 1 times [2021-10-13 19:21:26,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:26,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208145020] [2021-10-13 19:21:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:26,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:21:26,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:26,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208145020] [2021-10-13 19:21:26,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208145020] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:21:26,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:21:26,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 19:21:26,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656644273] [2021-10-13 19:21:26,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:21:26,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:26,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:21:26,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:21:26,857 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:26,877 INFO L93 Difference]: Finished difference Result 74 states and 156 transitions. [2021-10-13 19:21:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:21:26,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 19:21:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:26,880 INFO L225 Difference]: With dead ends: 74 [2021-10-13 19:21:26,880 INFO L226 Difference]: Without dead ends: 68 [2021-10-13 19:21:26,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 19:21:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-13 19:21:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2021-10-13 19:21:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 2.375) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 114 transitions. [2021-10-13 19:21:26,900 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 114 transitions. Word has length 10 [2021-10-13 19:21:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:26,901 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 114 transitions. [2021-10-13 19:21:26,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 114 transitions. [2021-10-13 19:21:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:21:26,905 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:26,905 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:26,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 19:21:26,906 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1692578182, now seen corresponding path program 2 times [2021-10-13 19:21:26,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:26,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061201878] [2021-10-13 19:21:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:26,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:27,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:27,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061201878] [2021-10-13 19:21:27,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061201878] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:27,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238537070] [2021-10-13 19:21:27,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:21:27,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:27,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:27,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:27,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 19:21:27,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 19:21:27,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:27,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:21:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:21:28,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238537070] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:21:28,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:21:28,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2021-10-13 19:21:28,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663910355] [2021-10-13 19:21:28,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:21:28,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:21:28,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:21:28,053 INFO L87 Difference]: Start difference. First operand 50 states and 114 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:28,087 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2021-10-13 19:21:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:21:28,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 19:21:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:28,089 INFO L225 Difference]: With dead ends: 60 [2021-10-13 19:21:28,089 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 19:21:28,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:21:28,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 19:21:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-10-13 19:21:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 2.375) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:28,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 114 transitions. [2021-10-13 19:21:28,093 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 114 transitions. Word has length 10 [2021-10-13 19:21:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:28,093 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 114 transitions. [2021-10-13 19:21:28,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 114 transitions. [2021-10-13 19:21:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:21:28,095 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:28,095 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:28,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:28,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 19:21:28,311 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:28,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1692578179, now seen corresponding path program 1 times [2021-10-13 19:21:28,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:28,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885981670] [2021-10-13 19:21:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:28,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:29,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:29,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885981670] [2021-10-13 19:21:29,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885981670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:29,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251441156] [2021-10-13 19:21:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:29,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:29,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:29,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:29,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 19:21:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:29,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:21:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:21:29,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251441156] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:21:29,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:21:29,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2021-10-13 19:21:29,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382009966] [2021-10-13 19:21:29,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:21:29,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:29,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:21:29,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:21:29,448 INFO L87 Difference]: Start difference. First operand 50 states and 114 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:29,481 INFO L93 Difference]: Finished difference Result 60 states and 135 transitions. [2021-10-13 19:21:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:21:29,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 19:21:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:29,483 INFO L225 Difference]: With dead ends: 60 [2021-10-13 19:21:29,483 INFO L226 Difference]: Without dead ends: 58 [2021-10-13 19:21:29,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:21:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-13 19:21:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-13 19:21:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 2.357142857142857) internal successors, (132), 57 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 132 transitions. [2021-10-13 19:21:29,496 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 132 transitions. Word has length 10 [2021-10-13 19:21:29,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:29,496 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 132 transitions. [2021-10-13 19:21:29,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 132 transitions. [2021-10-13 19:21:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 19:21:29,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:29,499 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:29,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:29,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:29,714 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1327140113, now seen corresponding path program 2 times [2021-10-13 19:21:29,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:29,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441143415] [2021-10-13 19:21:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:29,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:21:29,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:29,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441143415] [2021-10-13 19:21:29,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441143415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:29,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926986684] [2021-10-13 19:21:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:21:29,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:29,828 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:29,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 19:21:29,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:21:29,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:29,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 19:21:29,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:30,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 126 [2021-10-13 19:21:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:30,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926986684] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:30,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:30,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-13 19:21:30,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772329617] [2021-10-13 19:21:30,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:21:30,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:21:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:21:30,214 INFO L87 Difference]: Start difference. First operand 58 states and 132 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:30,410 INFO L93 Difference]: Finished difference Result 46 states and 92 transitions. [2021-10-13 19:21:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:21:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 19:21:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:30,417 INFO L225 Difference]: With dead ends: 46 [2021-10-13 19:21:30,417 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 19:21:30,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:21:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 19:21:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-13 19:21:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 78 transitions. [2021-10-13 19:21:30,420 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 78 transitions. Word has length 11 [2021-10-13 19:21:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:30,420 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 78 transitions. [2021-10-13 19:21:30,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 78 transitions. [2021-10-13 19:21:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:21:30,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:30,421 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:30,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:30,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-13 19:21:30,629 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:30,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1224990710, now seen corresponding path program 1 times [2021-10-13 19:21:30,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:30,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426155712] [2021-10-13 19:21:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:30,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:31,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:31,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426155712] [2021-10-13 19:21:31,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426155712] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:31,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46142232] [2021-10-13 19:21:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:31,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:31,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:31,056 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:31,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 19:21:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:31,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-13 19:21:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:31,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-13 19:21:31,459 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 19:21:31,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 19:21:31,577 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 19:21:31,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 19:21:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:32,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46142232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:32,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:32,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-13 19:21:32,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163290079] [2021-10-13 19:21:32,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:21:32,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:32,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:21:32,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:21:32,122 INFO L87 Difference]: Start difference. First operand 35 states and 78 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:32,997 INFO L93 Difference]: Finished difference Result 63 states and 127 transitions. [2021-10-13 19:21:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:21:32,998 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 19:21:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:32,998 INFO L225 Difference]: With dead ends: 63 [2021-10-13 19:21:32,999 INFO L226 Difference]: Without dead ends: 61 [2021-10-13 19:21:32,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1009.7ms TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-10-13 19:21:33,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-13 19:21:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2021-10-13 19:21:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 56 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 118 transitions. [2021-10-13 19:21:33,002 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 118 transitions. Word has length 12 [2021-10-13 19:21:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:33,003 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 118 transitions. [2021-10-13 19:21:33,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 118 transitions. [2021-10-13 19:21:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:21:33,004 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:33,004 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:33,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:33,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:33,214 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1224990713, now seen corresponding path program 3 times [2021-10-13 19:21:33,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:33,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126589102] [2021-10-13 19:21:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:33,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:33,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:33,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:33,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126589102] [2021-10-13 19:21:33,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126589102] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:33,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455841420] [2021-10-13 19:21:33,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:21:33,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:33,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:33,549 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:33,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 19:21:33,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:21:33,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 19:21:33,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:33,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-13 19:21:33,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:21:33,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 19:21:34,048 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:21:34,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-13 19:21:34,137 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:21:34,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-13 19:21:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:34,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455841420] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:34,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:34,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-13 19:21:34,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960571709] [2021-10-13 19:21:34,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:21:34,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:34,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:21:34,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:21:34,539 INFO L87 Difference]: Start difference. First operand 57 states and 118 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:35,175 INFO L93 Difference]: Finished difference Result 55 states and 111 transitions. [2021-10-13 19:21:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:21:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 19:21:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:35,178 INFO L225 Difference]: With dead ends: 55 [2021-10-13 19:21:35,178 INFO L226 Difference]: Without dead ends: 51 [2021-10-13 19:21:35,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 769.6ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:21:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-13 19:21:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-13 19:21:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 50 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 103 transitions. [2021-10-13 19:21:35,182 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 103 transitions. Word has length 12 [2021-10-13 19:21:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:35,183 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 103 transitions. [2021-10-13 19:21:35,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 103 transitions. [2021-10-13 19:21:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:21:35,184 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:35,184 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:35,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:35,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 19:21:35,398 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:35,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1224994430, now seen corresponding path program 2 times [2021-10-13 19:21:35,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:35,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662957450] [2021-10-13 19:21:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:35,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:35,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:35,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662957450] [2021-10-13 19:21:35,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662957450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:35,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620843667] [2021-10-13 19:21:35,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:21:35,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:35,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:35,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:35,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 19:21:36,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:21:36,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:36,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 19:21:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:36,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:21:36,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:21:36,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:21:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:37,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620843667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:37,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:37,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-13 19:21:37,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684364369] [2021-10-13 19:21:37,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 19:21:37,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 19:21:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-13 19:21:37,075 INFO L87 Difference]: Start difference. First operand 51 states and 103 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:38,253 INFO L93 Difference]: Finished difference Result 83 states and 179 transitions. [2021-10-13 19:21:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:21:38,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 19:21:38,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:38,255 INFO L225 Difference]: With dead ends: 83 [2021-10-13 19:21:38,255 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 19:21:38,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1246.5ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-10-13 19:21:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 19:21:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2021-10-13 19:21:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 56 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 118 transitions. [2021-10-13 19:21:38,258 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 118 transitions. Word has length 12 [2021-10-13 19:21:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:38,283 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 118 transitions. [2021-10-13 19:21:38,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 118 transitions. [2021-10-13 19:21:38,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:21:38,285 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:38,286 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:38,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:38,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:38,498 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:38,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1224994433, now seen corresponding path program 4 times [2021-10-13 19:21:38,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:38,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051442577] [2021-10-13 19:21:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:38,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:38,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:38,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051442577] [2021-10-13 19:21:38,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051442577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:38,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263661978] [2021-10-13 19:21:38,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:21:38,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:38,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:38,894 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:38,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 19:21:39,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:21:39,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:39,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 19:21:39,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:39,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-10-13 19:21:39,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:21:39,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:21:39,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:21:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:39,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263661978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:39,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:39,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-13 19:21:39,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115259181] [2021-10-13 19:21:39,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:21:39,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:39,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:21:39,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:21:39,729 INFO L87 Difference]: Start difference. First operand 57 states and 118 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:40,205 INFO L93 Difference]: Finished difference Result 63 states and 129 transitions. [2021-10-13 19:21:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:21:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 19:21:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:40,207 INFO L225 Difference]: With dead ends: 63 [2021-10-13 19:21:40,207 INFO L226 Difference]: Without dead ends: 61 [2021-10-13 19:21:40,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 616.4ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:21:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-13 19:21:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-13 19:21:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 2.135593220338983) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 126 transitions. [2021-10-13 19:21:40,212 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 126 transitions. Word has length 12 [2021-10-13 19:21:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:40,212 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 126 transitions. [2021-10-13 19:21:40,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 126 transitions. [2021-10-13 19:21:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:21:40,213 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:40,214 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:40,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-13 19:21:40,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 19:21:40,421 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:40,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1941640690, now seen corresponding path program 3 times [2021-10-13 19:21:40,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:40,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081928215] [2021-10-13 19:21:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:40,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:41,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:41,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081928215] [2021-10-13 19:21:41,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081928215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:41,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918561021] [2021-10-13 19:21:41,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:21:41,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:41,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:41,773 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:41,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 19:21:42,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:21:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 19:21:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:21:42,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918561021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:42,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:42,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 14 [2021-10-13 19:21:42,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818205794] [2021-10-13 19:21:42,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:21:42,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:21:42,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:21:42,397 INFO L87 Difference]: Start difference. First operand 61 states and 126 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:43,214 INFO L93 Difference]: Finished difference Result 85 states and 183 transitions. [2021-10-13 19:21:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 19:21:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 19:21:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:43,216 INFO L225 Difference]: With dead ends: 85 [2021-10-13 19:21:43,216 INFO L226 Difference]: Without dead ends: 85 [2021-10-13 19:21:43,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 935.7ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:21:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-13 19:21:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2021-10-13 19:21:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 2.2222222222222223) internal successors, (140), 64 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:43,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 140 transitions. [2021-10-13 19:21:43,220 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 140 transitions. Word has length 13 [2021-10-13 19:21:43,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:43,221 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 140 transitions. [2021-10-13 19:21:43,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 140 transitions. [2021-10-13 19:21:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:21:43,221 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:43,222 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:43,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-13 19:21:43,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 19:21:43,426 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:43,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1941640687, now seen corresponding path program 5 times [2021-10-13 19:21:43,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:43,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285367341] [2021-10-13 19:21:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:43,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:44,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:44,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285367341] [2021-10-13 19:21:44,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285367341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:44,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365177487] [2021-10-13 19:21:44,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:21:44,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:44,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:44,249 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:44,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 19:21:44,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:21:44,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:44,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 19:21:44,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:21:44,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365177487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:44,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:44,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-10-13 19:21:44,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860961113] [2021-10-13 19:21:44,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 19:21:44,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:44,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 19:21:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-10-13 19:21:44,911 INFO L87 Difference]: Start difference. First operand 65 states and 140 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2021-10-13 19:21:45,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:45,554 INFO L93 Difference]: Finished difference Result 83 states and 172 transitions. [2021-10-13 19:21:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 19:21:45,555 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 13 [2021-10-13 19:21:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:45,556 INFO L225 Difference]: With dead ends: 83 [2021-10-13 19:21:45,556 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 19:21:45,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 822.6ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:21:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 19:21:45,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2021-10-13 19:21:45,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:45,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 136 transitions. [2021-10-13 19:21:45,560 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 136 transitions. Word has length 13 [2021-10-13 19:21:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:45,560 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 136 transitions. [2021-10-13 19:21:45,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2021-10-13 19:21:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 136 transitions. [2021-10-13 19:21:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:21:45,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:45,561 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:45,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:45,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 19:21:45,775 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:45,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1941636970, now seen corresponding path program 4 times [2021-10-13 19:21:45,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:45,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371048621] [2021-10-13 19:21:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:45,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:47,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:47,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371048621] [2021-10-13 19:21:47,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371048621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:47,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558869757] [2021-10-13 19:21:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:21:47,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:47,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:47,682 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:47,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 19:21:47,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:21:47,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:47,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 19:21:47,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:21:48,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558869757] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:48,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:48,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2021-10-13 19:21:48,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36111078] [2021-10-13 19:21:48,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:21:48,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:48,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:21:48,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:21:48,398 INFO L87 Difference]: Start difference. First operand 65 states and 136 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-10-13 19:21:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:49,716 INFO L93 Difference]: Finished difference Result 99 states and 220 transitions. [2021-10-13 19:21:49,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 19:21:49,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 13 [2021-10-13 19:21:49,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:49,719 INFO L225 Difference]: With dead ends: 99 [2021-10-13 19:21:49,719 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 19:21:49,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1692.9ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:21:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 19:21:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 73. [2021-10-13 19:21:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 2.2816901408450705) internal successors, (162), 72 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 162 transitions. [2021-10-13 19:21:49,724 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 162 transitions. Word has length 13 [2021-10-13 19:21:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:49,725 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 162 transitions. [2021-10-13 19:21:49,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-10-13 19:21:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 162 transitions. [2021-10-13 19:21:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:21:49,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:49,726 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:49,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-13 19:21:49,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:49,934 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:49,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1941636967, now seen corresponding path program 6 times [2021-10-13 19:21:49,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:49,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644575502] [2021-10-13 19:21:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:49,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:50,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:50,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644575502] [2021-10-13 19:21:50,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644575502] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:50,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562184017] [2021-10-13 19:21:50,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:21:50,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:50,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:50,635 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:50,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 19:21:50,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:21:50,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 19:21:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:21:51,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562184017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:51,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:51,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-10-13 19:21:51,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701648048] [2021-10-13 19:21:51,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 19:21:51,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 19:21:51,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-10-13 19:21:51,292 INFO L87 Difference]: Start difference. First operand 73 states and 162 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2021-10-13 19:21:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:51,913 INFO L93 Difference]: Finished difference Result 99 states and 204 transitions. [2021-10-13 19:21:51,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 19:21:51,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 13 [2021-10-13 19:21:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:51,917 INFO L225 Difference]: With dead ends: 99 [2021-10-13 19:21:51,917 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 19:21:51,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 732.6ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:21:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 19:21:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2021-10-13 19:21:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 67 states have (on average 2.1492537313432836) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 144 transitions. [2021-10-13 19:21:51,926 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 144 transitions. Word has length 13 [2021-10-13 19:21:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:51,926 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 144 transitions. [2021-10-13 19:21:51,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2021-10-13 19:21:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 144 transitions. [2021-10-13 19:21:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 19:21:51,927 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:51,927 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:51,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:52,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:52,136 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash 395055354, now seen corresponding path program 5 times [2021-10-13 19:21:52,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:52,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59450189] [2021-10-13 19:21:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:52,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:52,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:52,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59450189] [2021-10-13 19:21:52,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59450189] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:52,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281772950] [2021-10-13 19:21:52,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:21:52,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:52,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:52,257 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:52,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 19:21:52,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:21:52,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:52,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 19:21:52,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:52,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281772950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:52,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:52,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-10-13 19:21:52,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65896740] [2021-10-13 19:21:52,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:21:52,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:52,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:21:52,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:21:52,998 INFO L87 Difference]: Start difference. First operand 69 states and 144 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:53,242 INFO L93 Difference]: Finished difference Result 65 states and 126 transitions. [2021-10-13 19:21:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:21:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 19:21:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:53,243 INFO L225 Difference]: With dead ends: 65 [2021-10-13 19:21:53,244 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 19:21:53,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:21:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 19:21:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-13 19:21:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 97 transitions. [2021-10-13 19:21:53,247 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 97 transitions. Word has length 14 [2021-10-13 19:21:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:53,247 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 97 transitions. [2021-10-13 19:21:53,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 97 transitions. [2021-10-13 19:21:53,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 19:21:53,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:53,248 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:53,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:53,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:53,456 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -61318550, now seen corresponding path program 6 times [2021-10-13 19:21:53,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:53,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970308452] [2021-10-13 19:21:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:53,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:21:53,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:53,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970308452] [2021-10-13 19:21:53,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970308452] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:53,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83791740] [2021-10-13 19:21:53,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:21:53,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:53,515 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:53,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 19:21:53,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:21:53,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:21:53,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 19:21:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:54,210 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 19:21:54,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 172 [2021-10-13 19:21:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:21:54,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83791740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:54,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:54,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2021-10-13 19:21:54,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371182609] [2021-10-13 19:21:54,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 19:21:54,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 19:21:54,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 19:21:54,361 INFO L87 Difference]: Start difference. First operand 44 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:54,623 INFO L93 Difference]: Finished difference Result 116 states and 253 transitions. [2021-10-13 19:21:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:21:54,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 19:21:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:54,625 INFO L225 Difference]: With dead ends: 116 [2021-10-13 19:21:54,625 INFO L226 Difference]: Without dead ends: 108 [2021-10-13 19:21:54,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:21:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-13 19:21:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 54. [2021-10-13 19:21:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 2.5) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 130 transitions. [2021-10-13 19:21:54,636 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 130 transitions. Word has length 14 [2021-10-13 19:21:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:54,637 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 130 transitions. [2021-10-13 19:21:54,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 130 transitions. [2021-10-13 19:21:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:21:54,640 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:54,640 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:54,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 19:21:54,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:54,855 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:54,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1900993518, now seen corresponding path program 7 times [2021-10-13 19:21:54,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:54,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733764147] [2021-10-13 19:21:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:54,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:55,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:55,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733764147] [2021-10-13 19:21:55,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733764147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:55,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025606133] [2021-10-13 19:21:55,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:21:55,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:55,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:55,321 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:55,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 19:21:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 19:21:55,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:21:55,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:21:55,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-10-13 19:21:55,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-13 19:21:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:21:55,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 19:21:55,940 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:21:55,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-13 19:21:56,059 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:21:56,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 19:21:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:56,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025606133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:56,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:21:56,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-13 19:21:56,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808628035] [2021-10-13 19:21:56,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:21:56,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:21:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:21:56,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:21:56,730 INFO L87 Difference]: Start difference. First operand 54 states and 130 transitions. Second operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:21:58,210 INFO L93 Difference]: Finished difference Result 134 states and 317 transitions. [2021-10-13 19:21:58,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:21:58,215 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 19:21:58,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:21:58,217 INFO L225 Difference]: With dead ends: 134 [2021-10-13 19:21:58,217 INFO L226 Difference]: Without dead ends: 132 [2021-10-13 19:21:58,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1511.0ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 19:21:58,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-13 19:21:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 94. [2021-10-13 19:21:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 2.5543478260869565) internal successors, (235), 93 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 235 transitions. [2021-10-13 19:21:58,223 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 235 transitions. Word has length 15 [2021-10-13 19:21:58,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:21:58,223 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 235 transitions. [2021-10-13 19:21:58,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:21:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 235 transitions. [2021-10-13 19:21:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:21:58,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:21:58,224 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:21:58,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-13 19:21:58,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 19:21:58,439 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:21:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:21:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1900993515, now seen corresponding path program 7 times [2021-10-13 19:21:58,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:21:58,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034342305] [2021-10-13 19:21:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:21:58,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:21:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:21:59,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:21:59,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034342305] [2021-10-13 19:21:59,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034342305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:21:59,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607126117] [2021-10-13 19:21:59,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:21:59,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:21:59,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:21:59,164 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:21:59,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 19:21:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:21:59,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 19:21:59,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:00,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607126117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:00,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:00,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2021-10-13 19:22:00,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267620125] [2021-10-13 19:22:00,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 19:22:00,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 19:22:00,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:22:00,402 INFO L87 Difference]: Start difference. First operand 94 states and 235 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:01,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:01,326 INFO L93 Difference]: Finished difference Result 104 states and 256 transitions. [2021-10-13 19:22:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:22:01,327 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 19:22:01,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:01,329 INFO L225 Difference]: With dead ends: 104 [2021-10-13 19:22:01,329 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 19:22:01,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1259.4ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 19:22:01,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 19:22:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2021-10-13 19:22:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 2.5348837209302326) internal successors, (218), 87 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 218 transitions. [2021-10-13 19:22:01,334 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 218 transitions. Word has length 15 [2021-10-13 19:22:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:01,335 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 218 transitions. [2021-10-13 19:22:01,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 218 transitions. [2021-10-13 19:22:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:22:01,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:01,341 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:01,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:01,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-13 19:22:01,541 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:01,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1900878198, now seen corresponding path program 8 times [2021-10-13 19:22:01,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:01,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980703954] [2021-10-13 19:22:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:01,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:01,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:01,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980703954] [2021-10-13 19:22:01,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980703954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:01,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135595011] [2021-10-13 19:22:01,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:22:01,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:01,966 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:01,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 19:22:02,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:22:02,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:02,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-13 19:22:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:02,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:22:02,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 97 [2021-10-13 19:22:02,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-13 19:22:02,720 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-10-13 19:22:02,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 40 [2021-10-13 19:22:02,852 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:22:02,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-10-13 19:22:02,970 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:22:02,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-13 19:22:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:03,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135595011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:03,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:03,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2021-10-13 19:22:03,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026107903] [2021-10-13 19:22:03,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 19:22:03,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 19:22:03,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:22:03,861 INFO L87 Difference]: Start difference. First operand 88 states and 218 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:06,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:06,266 INFO L93 Difference]: Finished difference Result 321 states and 840 transitions. [2021-10-13 19:22:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 19:22:06,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 19:22:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:06,273 INFO L225 Difference]: With dead ends: 321 [2021-10-13 19:22:06,273 INFO L226 Difference]: Without dead ends: 319 [2021-10-13 19:22:06,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 2503.7ms TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 19:22:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-10-13 19:22:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 174. [2021-10-13 19:22:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 172 states have (on average 3.191860465116279) internal successors, (549), 173 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 549 transitions. [2021-10-13 19:22:06,297 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 549 transitions. Word has length 15 [2021-10-13 19:22:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:06,297 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 549 transitions. [2021-10-13 19:22:06,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 549 transitions. [2021-10-13 19:22:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:22:06,302 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:06,302 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:06,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:06,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 19:22:06,503 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:06,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:06,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1900878195, now seen corresponding path program 8 times [2021-10-13 19:22:06,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:06,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594767054] [2021-10-13 19:22:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:06,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:07,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:07,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594767054] [2021-10-13 19:22:07,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594767054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:07,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579876808] [2021-10-13 19:22:07,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:22:07,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:07,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:07,155 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:07,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 19:22:07,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:22:07,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:07,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 19:22:07,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:07,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:22:07,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-13 19:22:07,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:22:07,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:22:07,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:22:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:08,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579876808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:08,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:08,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2021-10-13 19:22:08,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028230181] [2021-10-13 19:22:08,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 19:22:08,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:08,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 19:22:08,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:22:08,528 INFO L87 Difference]: Start difference. First operand 174 states and 549 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:10,964 INFO L93 Difference]: Finished difference Result 245 states and 666 transitions. [2021-10-13 19:22:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 19:22:10,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 19:22:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:10,967 INFO L225 Difference]: With dead ends: 245 [2021-10-13 19:22:10,967 INFO L226 Difference]: Without dead ends: 223 [2021-10-13 19:22:10,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2498.2ms TimeCoverageRelationStatistics Valid=267, Invalid=1713, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 19:22:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-13 19:22:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 144. [2021-10-13 19:22:10,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 142 states have (on average 3.1549295774647885) internal successors, (448), 143 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 448 transitions. [2021-10-13 19:22:10,977 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 448 transitions. Word has length 15 [2021-10-13 19:22:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:10,977 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 448 transitions. [2021-10-13 19:22:10,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 448 transitions. [2021-10-13 19:22:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:22:10,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:10,978 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:11,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:11,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 19:22:11,192 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1897303278, now seen corresponding path program 9 times [2021-10-13 19:22:11,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:11,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360872027] [2021-10-13 19:22:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:11,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:11,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:11,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360872027] [2021-10-13 19:22:11,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360872027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:11,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402805259] [2021-10-13 19:22:11,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:22:11,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:11,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:11,511 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:11,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 19:22:12,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:22:12,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:12,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 19:22:12,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:22:12,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402805259] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:12,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:12,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2021-10-13 19:22:12,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115832994] [2021-10-13 19:22:12,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 19:22:12,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 19:22:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-10-13 19:22:12,415 INFO L87 Difference]: Start difference. First operand 144 states and 448 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:14,374 INFO L93 Difference]: Finished difference Result 412 states and 1154 transitions. [2021-10-13 19:22:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 19:22:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 19:22:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:14,379 INFO L225 Difference]: With dead ends: 412 [2021-10-13 19:22:14,379 INFO L226 Difference]: Without dead ends: 412 [2021-10-13 19:22:14,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1706.1ms TimeCoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 19:22:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-10-13 19:22:14,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 222. [2021-10-13 19:22:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 220 states have (on average 3.3863636363636362) internal successors, (745), 221 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:14,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 745 transitions. [2021-10-13 19:22:14,393 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 745 transitions. Word has length 15 [2021-10-13 19:22:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:14,393 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 745 transitions. [2021-10-13 19:22:14,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:14,394 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 745 transitions. [2021-10-13 19:22:14,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:22:14,394 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:14,394 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:14,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:14,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 19:22:14,608 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:14,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:14,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1897303275, now seen corresponding path program 9 times [2021-10-13 19:22:14,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:14,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516629039] [2021-10-13 19:22:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:14,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:15,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:15,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516629039] [2021-10-13 19:22:15,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516629039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:15,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138071047] [2021-10-13 19:22:15,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:22:15,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:15,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:15,284 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:15,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 19:22:15,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:22:15,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:15,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 19:22:15,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:22:16,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138071047] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:16,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:16,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 19 [2021-10-13 19:22:16,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715728614] [2021-10-13 19:22:16,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 19:22:16,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:16,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 19:22:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-10-13 19:22:16,488 INFO L87 Difference]: Start difference. First operand 222 states and 745 transitions. Second operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:18,055 INFO L93 Difference]: Finished difference Result 304 states and 880 transitions. [2021-10-13 19:22:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:22:18,056 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 19:22:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:18,058 INFO L225 Difference]: With dead ends: 304 [2021-10-13 19:22:18,058 INFO L226 Difference]: Without dead ends: 292 [2021-10-13 19:22:18,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1488.0ms TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 19:22:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-10-13 19:22:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 232. [2021-10-13 19:22:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 230 states have (on average 3.1913043478260867) internal successors, (734), 231 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 734 transitions. [2021-10-13 19:22:18,069 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 734 transitions. Word has length 15 [2021-10-13 19:22:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:18,070 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 734 transitions. [2021-10-13 19:22:18,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 734 transitions. [2021-10-13 19:22:18,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:22:18,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:18,071 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:18,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:18,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 19:22:18,286 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:18,286 INFO L82 PathProgramCache]: Analyzing trace with hash -60374278, now seen corresponding path program 10 times [2021-10-13 19:22:18,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:18,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896430370] [2021-10-13 19:22:18,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:18,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:18,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:18,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896430370] [2021-10-13 19:22:18,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896430370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:18,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959753806] [2021-10-13 19:22:18,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:22:18,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:18,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:18,986 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:18,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 19:22:19,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:22:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:19,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 19:22:19,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:22:20,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959753806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:20,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:20,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-13 19:22:20,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749683480] [2021-10-13 19:22:20,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 19:22:20,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 19:22:20,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:22:20,143 INFO L87 Difference]: Start difference. First operand 232 states and 734 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:21,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:21,832 INFO L93 Difference]: Finished difference Result 374 states and 1088 transitions. [2021-10-13 19:22:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 19:22:21,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 19:22:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:21,836 INFO L225 Difference]: With dead ends: 374 [2021-10-13 19:22:21,836 INFO L226 Difference]: Without dead ends: 370 [2021-10-13 19:22:21,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1774.3ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 19:22:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-10-13 19:22:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 300. [2021-10-13 19:22:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 298 states have (on average 3.164429530201342) internal successors, (943), 299 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 943 transitions. [2021-10-13 19:22:21,850 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 943 transitions. Word has length 16 [2021-10-13 19:22:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:21,850 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 943 transitions. [2021-10-13 19:22:21,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 943 transitions. [2021-10-13 19:22:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:22:21,851 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:21,852 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:21,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:22,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 19:22:22,068 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:22,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:22,069 INFO L82 PathProgramCache]: Analyzing trace with hash -60374275, now seen corresponding path program 10 times [2021-10-13 19:22:22,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:22,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500848114] [2021-10-13 19:22:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:22,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:23,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:23,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500848114] [2021-10-13 19:22:23,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500848114] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:23,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019521145] [2021-10-13 19:22:23,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:22:23,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:23,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:23,366 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:23,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 19:22:23,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:22:23,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:23,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 19:22:23,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:22:24,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019521145] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:24,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:24,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-13 19:22:24,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465720711] [2021-10-13 19:22:24,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 19:22:24,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:24,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 19:22:24,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:22:24,659 INFO L87 Difference]: Start difference. First operand 300 states and 943 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:26,869 INFO L93 Difference]: Finished difference Result 340 states and 1025 transitions. [2021-10-13 19:22:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:22:26,870 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 19:22:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:26,874 INFO L225 Difference]: With dead ends: 340 [2021-10-13 19:22:26,882 INFO L226 Difference]: Without dead ends: 328 [2021-10-13 19:22:26,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2356.1ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 19:22:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-10-13 19:22:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 312. [2021-10-13 19:22:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 310 states have (on average 3.106451612903226) internal successors, (963), 311 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 963 transitions. [2021-10-13 19:22:26,915 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 963 transitions. Word has length 16 [2021-10-13 19:22:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:26,915 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 963 transitions. [2021-10-13 19:22:26,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 963 transitions. [2021-10-13 19:22:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:22:26,918 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:26,918 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:26,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-13 19:22:27,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:27,132 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:27,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:27,133 INFO L82 PathProgramCache]: Analyzing trace with hash -60258955, now seen corresponding path program 11 times [2021-10-13 19:22:27,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:27,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153393286] [2021-10-13 19:22:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:27,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:28,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:28,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153393286] [2021-10-13 19:22:28,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153393286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:28,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734882213] [2021-10-13 19:22:28,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:22:28,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:28,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:28,428 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:28,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 19:22:29,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:22:29,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:29,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 19:22:29,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:22:29,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734882213] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:29,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:29,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 23 [2021-10-13 19:22:29,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270828808] [2021-10-13 19:22:29,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 19:22:29,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 19:22:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:22:29,786 INFO L87 Difference]: Start difference. First operand 312 states and 963 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:32,052 INFO L93 Difference]: Finished difference Result 468 states and 1339 transitions. [2021-10-13 19:22:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 19:22:32,053 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 19:22:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:32,057 INFO L225 Difference]: With dead ends: 468 [2021-10-13 19:22:32,057 INFO L226 Difference]: Without dead ends: 464 [2021-10-13 19:22:32,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2473.5ms TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 19:22:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-10-13 19:22:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 350. [2021-10-13 19:22:32,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 348 states have (on average 3.1551724137931036) internal successors, (1098), 349 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1098 transitions. [2021-10-13 19:22:32,076 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1098 transitions. Word has length 16 [2021-10-13 19:22:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:32,076 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 1098 transitions. [2021-10-13 19:22:32,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1098 transitions. [2021-10-13 19:22:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:22:32,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:32,077 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:32,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:32,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-13 19:22:32,292 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:32,292 INFO L82 PathProgramCache]: Analyzing trace with hash -60255238, now seen corresponding path program 11 times [2021-10-13 19:22:32,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:32,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236517183] [2021-10-13 19:22:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:32,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:33,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:33,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236517183] [2021-10-13 19:22:33,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236517183] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:33,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620237604] [2021-10-13 19:22:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:22:33,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:33,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:33,890 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:33,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 19:22:34,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:22:34,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 19:22:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:22:35,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620237604] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:35,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:35,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-10-13 19:22:35,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264325177] [2021-10-13 19:22:35,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 19:22:35,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:35,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 19:22:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:22:35,222 INFO L87 Difference]: Start difference. First operand 350 states and 1098 transitions. Second operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:36,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:36,831 INFO L93 Difference]: Finished difference Result 386 states and 1164 transitions. [2021-10-13 19:22:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:22:36,832 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 19:22:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:36,836 INFO L225 Difference]: With dead ends: 386 [2021-10-13 19:22:36,836 INFO L226 Difference]: Without dead ends: 376 [2021-10-13 19:22:36,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1824.4ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 19:22:36,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-10-13 19:22:36,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 352. [2021-10-13 19:22:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 350 states have (on average 3.0885714285714285) internal successors, (1081), 351 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1081 transitions. [2021-10-13 19:22:36,852 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1081 transitions. Word has length 16 [2021-10-13 19:22:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:36,852 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 1081 transitions. [2021-10-13 19:22:36,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1081 transitions. [2021-10-13 19:22:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:22:36,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:36,855 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:36,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:37,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-13 19:22:37,070 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:37,071 INFO L82 PathProgramCache]: Analyzing trace with hash -56680318, now seen corresponding path program 12 times [2021-10-13 19:22:37,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:37,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137435944] [2021-10-13 19:22:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:37,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:38,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:38,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137435944] [2021-10-13 19:22:38,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137435944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:38,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543042692] [2021-10-13 19:22:38,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:22:38,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:38,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:38,690 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:38,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-13 19:22:39,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:22:39,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:39,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 19:22:39,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:22:40,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543042692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:40,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:40,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 23 [2021-10-13 19:22:40,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265664192] [2021-10-13 19:22:40,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 19:22:40,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 19:22:40,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:22:40,024 INFO L87 Difference]: Start difference. First operand 352 states and 1081 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:41,405 INFO L93 Difference]: Finished difference Result 396 states and 1201 transitions. [2021-10-13 19:22:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 19:22:41,405 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-13 19:22:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:41,409 INFO L225 Difference]: With dead ends: 396 [2021-10-13 19:22:41,410 INFO L226 Difference]: Without dead ends: 390 [2021-10-13 19:22:41,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1816.5ms TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 19:22:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-10-13 19:22:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 354. [2021-10-13 19:22:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 3.0625) internal successors, (1078), 353 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1078 transitions. [2021-10-13 19:22:41,423 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1078 transitions. Word has length 16 [2021-10-13 19:22:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:41,423 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 1078 transitions. [2021-10-13 19:22:41,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1078 transitions. [2021-10-13 19:22:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:22:41,425 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:41,425 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:41,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:41,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:41,640 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1493647847, now seen corresponding path program 12 times [2021-10-13 19:22:41,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:41,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707548501] [2021-10-13 19:22:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:41,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:22:41,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:41,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707548501] [2021-10-13 19:22:41,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707548501] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:41,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581627641] [2021-10-13 19:22:41,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:22:41,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:41,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:41,860 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:41,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 19:22:42,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:22:42,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:22:42,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 19:22:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:22:42,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581627641] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:42,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:42,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-13 19:22:42,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939074998] [2021-10-13 19:22:42,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 19:22:42,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 19:22:42,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-13 19:22:42,747 INFO L87 Difference]: Start difference. First operand 354 states and 1078 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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) [2021-10-13 19:22:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:43,145 INFO L93 Difference]: Finished difference Result 230 states and 578 transitions. [2021-10-13 19:22:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 19:22:43,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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 17 [2021-10-13 19:22:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:43,147 INFO L225 Difference]: With dead ends: 230 [2021-10-13 19:22:43,147 INFO L226 Difference]: Without dead ends: 195 [2021-10-13 19:22:43,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-10-13 19:22:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-10-13 19:22:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-10-13 19:22:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 2.7357512953367875) internal successors, (528), 194 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 528 transitions. [2021-10-13 19:22:43,157 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 528 transitions. Word has length 17 [2021-10-13 19:22:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:43,157 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 528 transitions. [2021-10-13 19:22:43,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 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) [2021-10-13 19:22:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 528 transitions. [2021-10-13 19:22:43,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:22:43,158 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:43,158 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:43,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-13 19:22:43,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-13 19:22:43,374 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:43,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1868030846, now seen corresponding path program 13 times [2021-10-13 19:22:43,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:43,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346255197] [2021-10-13 19:22:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:43,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:44,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:44,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346255197] [2021-10-13 19:22:44,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346255197] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:44,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421747617] [2021-10-13 19:22:44,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:22:44,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:44,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:44,448 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:44,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-13 19:22:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:45,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 19:22:45,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:45,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-13 19:22:45,439 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-13 19:22:45,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 49 [2021-10-13 19:22:45,626 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-13 19:22:45,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 56 [2021-10-13 19:22:45,836 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:22:45,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-10-13 19:22:46,138 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:22:46,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-10-13 19:22:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421747617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:47,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:47,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-13 19:22:47,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659838516] [2021-10-13 19:22:47,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:22:47,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:22:47,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:22:47,407 INFO L87 Difference]: Start difference. First operand 195 states and 528 transitions. Second operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:53,200 INFO L93 Difference]: Finished difference Result 593 states and 1505 transitions. [2021-10-13 19:22:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-13 19:22:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 19:22:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:53,204 INFO L225 Difference]: With dead ends: 593 [2021-10-13 19:22:53,204 INFO L226 Difference]: Without dead ends: 589 [2021-10-13 19:22:53,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 5061.3ms TimeCoverageRelationStatistics Valid=425, Invalid=3607, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 19:22:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-10-13 19:22:53,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 321. [2021-10-13 19:22:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 319 states have (on average 3.1065830721003134) internal successors, (991), 320 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 991 transitions. [2021-10-13 19:22:53,227 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 991 transitions. Word has length 17 [2021-10-13 19:22:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:53,227 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 991 transitions. [2021-10-13 19:22:53,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 991 transitions. [2021-10-13 19:22:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:22:53,228 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:53,228 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:53,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:53,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:53,442 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:53,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1757089283, now seen corresponding path program 13 times [2021-10-13 19:22:53,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:53,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120520931] [2021-10-13 19:22:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:53,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:54,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:54,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120520931] [2021-10-13 19:22:54,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120520931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:54,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597874676] [2021-10-13 19:22:54,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:22:54,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:54,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:54,211 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:54,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-13 19:22:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:54,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 19:22:54,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:22:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:56,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597874676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:56,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:22:56,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-13 19:22:56,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392831141] [2021-10-13 19:22:56,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 19:22:56,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:22:56,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 19:22:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-10-13 19:22:56,008 INFO L87 Difference]: Start difference. First operand 321 states and 991 transitions. Second operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:22:57,704 INFO L93 Difference]: Finished difference Result 435 states and 1288 transitions. [2021-10-13 19:22:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:22:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 19:22:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:22:57,716 INFO L225 Difference]: With dead ends: 435 [2021-10-13 19:22:57,717 INFO L226 Difference]: Without dead ends: 435 [2021-10-13 19:22:57,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1823.0ms TimeCoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 19:22:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-10-13 19:22:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 361. [2021-10-13 19:22:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 359 states have (on average 3.139275766016713) internal successors, (1127), 360 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1127 transitions. [2021-10-13 19:22:57,748 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1127 transitions. Word has length 17 [2021-10-13 19:22:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:22:57,750 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1127 transitions. [2021-10-13 19:22:57,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:22:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1127 transitions. [2021-10-13 19:22:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:22:57,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:22:57,751 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:22:57,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-13 19:22:57,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:57,975 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:22:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:22:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1164362634, now seen corresponding path program 14 times [2021-10-13 19:22:57,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:22:57,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252991906] [2021-10-13 19:22:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:22:57,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:22:58,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:22:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:22:59,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:22:59,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252991906] [2021-10-13 19:22:59,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252991906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:22:59,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282440725] [2021-10-13 19:22:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:22:59,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:22:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:22:59,823 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:22:59,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 19:23:00,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:23:00,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 19:23:00,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:23:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282440725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:01,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:01,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-10-13 19:23:01,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731035584] [2021-10-13 19:23:01,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 19:23:01,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 19:23:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:23:01,411 INFO L87 Difference]: Start difference. First operand 361 states and 1127 transitions. Second operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:04,100 INFO L93 Difference]: Finished difference Result 465 states and 1350 transitions. [2021-10-13 19:23:04,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:23:04,100 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 19:23:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:04,105 INFO L225 Difference]: With dead ends: 465 [2021-10-13 19:23:04,105 INFO L226 Difference]: Without dead ends: 453 [2021-10-13 19:23:04,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 3161.3ms TimeCoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 19:23:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-10-13 19:23:04,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 371. [2021-10-13 19:23:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 369 states have (on average 3.059620596205962) internal successors, (1129), 370 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1129 transitions. [2021-10-13 19:23:04,118 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1129 transitions. Word has length 17 [2021-10-13 19:23:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:04,119 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1129 transitions. [2021-10-13 19:23:04,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1129 transitions. [2021-10-13 19:23:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:04,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:04,120 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:04,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 19:23:04,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-13 19:23:04,335 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:04,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2106070010, now seen corresponding path program 15 times [2021-10-13 19:23:04,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:04,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819174825] [2021-10-13 19:23:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:04,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:23:04,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:04,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819174825] [2021-10-13 19:23:04,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819174825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:04,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163707097] [2021-10-13 19:23:04,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:23:04,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:04,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:04,483 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:04,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-13 19:23:05,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:23:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:05,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 19:23:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:06,977 INFO L354 Elim1Store]: treesize reduction 176, result has 0.6 percent of original size [2021-10-13 19:23:06,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 294 treesize of output 190 [2021-10-13 19:23:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:23:07,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163707097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:07,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:07,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-10-13 19:23:07,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606079188] [2021-10-13 19:23:07,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 19:23:07,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 19:23:07,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:23:07,043 INFO L87 Difference]: Start difference. First operand 371 states and 1129 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:08,685 INFO L93 Difference]: Finished difference Result 305 states and 714 transitions. [2021-10-13 19:23:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:23:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:23:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:08,688 INFO L225 Difference]: With dead ends: 305 [2021-10-13 19:23:08,688 INFO L226 Difference]: Without dead ends: 285 [2021-10-13 19:23:08,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1717.2ms TimeCoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 19:23:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-10-13 19:23:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 239. [2021-10-13 19:23:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 237 states have (on average 2.409282700421941) internal successors, (571), 238 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 571 transitions. [2021-10-13 19:23:08,712 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 571 transitions. Word has length 18 [2021-10-13 19:23:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:08,713 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 571 transitions. [2021-10-13 19:23:08,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 571 transitions. [2021-10-13 19:23:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:08,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:08,717 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:08,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-13 19:23:08,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 19:23:08,924 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2106189174, now seen corresponding path program 16 times [2021-10-13 19:23:08,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:08,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096467157] [2021-10-13 19:23:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:08,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:09,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:09,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096467157] [2021-10-13 19:23:09,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096467157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:09,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743510141] [2021-10-13 19:23:09,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:23:09,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:09,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:09,483 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:09,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-13 19:23:10,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:23:10,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:10,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 19:23:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:10,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2021-10-13 19:23:10,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-13 19:23:10,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:23:10,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 19:23:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:23:10,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-10-13 19:23:10,747 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-13 19:23:10,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-10-13 19:23:10,867 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-13 19:23:10,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-10-13 19:23:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:11,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743510141] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:11,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:11,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:23:11,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104089410] [2021-10-13 19:23:11,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:23:11,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:11,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:23:11,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:23:11,938 INFO L87 Difference]: Start difference. First operand 239 states and 571 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:14,340 INFO L93 Difference]: Finished difference Result 299 states and 684 transitions. [2021-10-13 19:23:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 19:23:14,340 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:23:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:14,342 INFO L225 Difference]: With dead ends: 299 [2021-10-13 19:23:14,343 INFO L226 Difference]: Without dead ends: 299 [2021-10-13 19:23:14,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2707.3ms TimeCoverageRelationStatistics Valid=356, Invalid=2400, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 19:23:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-10-13 19:23:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 231. [2021-10-13 19:23:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 229 states have (on average 2.3449781659388647) internal successors, (537), 230 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 537 transitions. [2021-10-13 19:23:14,371 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 537 transitions. Word has length 18 [2021-10-13 19:23:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:14,372 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 537 transitions. [2021-10-13 19:23:14,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 537 transitions. [2021-10-13 19:23:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:14,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:14,373 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:14,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-13 19:23:14,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 19:23:14,587 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:14,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:14,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2106189177, now seen corresponding path program 14 times [2021-10-13 19:23:14,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:14,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28059584] [2021-10-13 19:23:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:14,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:15,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:15,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28059584] [2021-10-13 19:23:15,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28059584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:15,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636537914] [2021-10-13 19:23:15,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:23:15,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:15,271 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:15,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 19:23:16,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:23:16,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:16,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 19:23:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:16,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:23:16,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:23:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:23:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:17,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636537914] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:17,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:17,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:23:17,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799904086] [2021-10-13 19:23:17,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:23:17,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:23:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:23:17,509 INFO L87 Difference]: Start difference. First operand 231 states and 537 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:21,090 INFO L93 Difference]: Finished difference Result 287 states and 640 transitions. [2021-10-13 19:23:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:23:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:23:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:21,092 INFO L225 Difference]: With dead ends: 287 [2021-10-13 19:23:21,092 INFO L226 Difference]: Without dead ends: 263 [2021-10-13 19:23:21,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3901.1ms TimeCoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 19:23:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-10-13 19:23:21,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 215. [2021-10-13 19:23:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 214 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 499 transitions. [2021-10-13 19:23:21,100 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 499 transitions. Word has length 18 [2021-10-13 19:23:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:21,100 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 499 transitions. [2021-10-13 19:23:21,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 499 transitions. [2021-10-13 19:23:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:21,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:21,101 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:21,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-13 19:23:21,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 19:23:21,315 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:21,315 INFO L82 PathProgramCache]: Analyzing trace with hash 2109764094, now seen corresponding path program 17 times [2021-10-13 19:23:21,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:21,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37402667] [2021-10-13 19:23:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:21,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:22,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:22,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37402667] [2021-10-13 19:23:22,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37402667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:22,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084752168] [2021-10-13 19:23:22,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:23:22,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:22,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:22,604 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:22,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-13 19:23:23,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:23:23,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 19:23:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:23,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2021-10-13 19:23:23,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-13 19:23:23,925 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:23:23,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 19:23:24,014 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:23:24,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 19:23:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:25,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084752168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:25,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:25,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:23:25,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434991983] [2021-10-13 19:23:25,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:23:25,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:23:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:23:25,031 INFO L87 Difference]: Start difference. First operand 215 states and 499 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:26,965 INFO L93 Difference]: Finished difference Result 251 states and 559 transitions. [2021-10-13 19:23:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 19:23:26,966 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:23:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:26,967 INFO L225 Difference]: With dead ends: 251 [2021-10-13 19:23:26,967 INFO L226 Difference]: Without dead ends: 251 [2021-10-13 19:23:26,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 2359.3ms TimeCoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 19:23:26,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-13 19:23:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 215. [2021-10-13 19:23:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 214 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 499 transitions. [2021-10-13 19:23:26,978 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 499 transitions. Word has length 18 [2021-10-13 19:23:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:26,978 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 499 transitions. [2021-10-13 19:23:26,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:26,978 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 499 transitions. [2021-10-13 19:23:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:26,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:26,979 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:27,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-13 19:23:27,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:27,180 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2109764097, now seen corresponding path program 15 times [2021-10-13 19:23:27,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:27,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827552141] [2021-10-13 19:23:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:27,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:28,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:28,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827552141] [2021-10-13 19:23:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827552141] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:28,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712966655] [2021-10-13 19:23:28,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:23:28,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:28,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:28,330 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:28,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-13 19:23:29,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:23:29,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:29,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-13 19:23:29,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:29,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 19:23:30,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:23:30,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:23:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:31,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712966655] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:31,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:31,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:23:31,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228189500] [2021-10-13 19:23:31,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:23:31,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:23:31,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:23:31,100 INFO L87 Difference]: Start difference. First operand 215 states and 499 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:32,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:32,915 INFO L93 Difference]: Finished difference Result 251 states and 551 transitions. [2021-10-13 19:23:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 19:23:32,916 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:23:32,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:32,917 INFO L225 Difference]: With dead ends: 251 [2021-10-13 19:23:32,917 INFO L226 Difference]: Without dead ends: 231 [2021-10-13 19:23:32,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2278.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 19:23:32,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-10-13 19:23:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2021-10-13 19:23:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 2.323943661971831) internal successors, (495), 214 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 495 transitions. [2021-10-13 19:23:32,925 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 495 transitions. Word has length 18 [2021-10-13 19:23:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:32,925 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 495 transitions. [2021-10-13 19:23:32,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 495 transitions. [2021-10-13 19:23:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:32,926 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:32,926 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:32,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-13 19:23:33,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:33,136 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:33,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:33,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2109883134, now seen corresponding path program 18 times [2021-10-13 19:23:33,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:33,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548171365] [2021-10-13 19:23:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:33,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:34,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:34,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548171365] [2021-10-13 19:23:34,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548171365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:34,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888150995] [2021-10-13 19:23:34,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:23:34,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:34,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:34,382 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:34,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 19:23:35,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:23:35,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 19:23:35,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:35,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:23:35,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 144 [2021-10-13 19:23:35,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-13 19:23:35,705 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:23:35,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-13 19:23:35,811 INFO L354 Elim1Store]: treesize reduction 30, result has 42.3 percent of original size [2021-10-13 19:23:35,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 52 [2021-10-13 19:23:35,994 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:23:35,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2021-10-13 19:23:36,174 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:23:36,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 19:23:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:37,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888150995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:37,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:37,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 19:23:37,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964090064] [2021-10-13 19:23:37,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:23:37,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:37,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:23:37,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:23:37,555 INFO L87 Difference]: Start difference. First operand 215 states and 495 transitions. Second operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:39,973 INFO L93 Difference]: Finished difference Result 241 states and 538 transitions. [2021-10-13 19:23:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:23:39,976 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:23:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:39,978 INFO L225 Difference]: With dead ends: 241 [2021-10-13 19:23:39,978 INFO L226 Difference]: Without dead ends: 241 [2021-10-13 19:23:39,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 3126.0ms TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 19:23:39,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-10-13 19:23:39,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 215. [2021-10-13 19:23:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 2.3051643192488265) internal successors, (491), 214 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 491 transitions. [2021-10-13 19:23:39,986 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 491 transitions. Word has length 18 [2021-10-13 19:23:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:39,988 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 491 transitions. [2021-10-13 19:23:39,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 491 transitions. [2021-10-13 19:23:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:39,994 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:39,995 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:40,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-13 19:23:40,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:40,196 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:40,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:40,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2109883137, now seen corresponding path program 16 times [2021-10-13 19:23:40,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:40,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904695322] [2021-10-13 19:23:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:40,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:41,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:41,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904695322] [2021-10-13 19:23:41,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904695322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:41,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67787454] [2021-10-13 19:23:41,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:23:41,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:41,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:41,566 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:41,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-13 19:23:42,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:23:42,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 19:23:42,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:42,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 113 [2021-10-13 19:23:42,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 19:23:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:23:43,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:23:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:44,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67787454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:44,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:44,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:23:44,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114240442] [2021-10-13 19:23:44,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:23:44,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:23:44,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:23:44,232 INFO L87 Difference]: Start difference. First operand 215 states and 491 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:46,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:46,063 INFO L93 Difference]: Finished difference Result 233 states and 514 transitions. [2021-10-13 19:23:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:23:46,064 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:23:46,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:46,065 INFO L225 Difference]: With dead ends: 233 [2021-10-13 19:23:46,065 INFO L226 Difference]: Without dead ends: 233 [2021-10-13 19:23:46,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2230.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1795, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 19:23:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-10-13 19:23:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 211. [2021-10-13 19:23:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 209 states have (on average 2.291866028708134) internal successors, (479), 210 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 479 transitions. [2021-10-13 19:23:46,070 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 479 transitions. Word has length 18 [2021-10-13 19:23:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:46,071 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 479 transitions. [2021-10-13 19:23:46,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 479 transitions. [2021-10-13 19:23:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:46,072 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:46,072 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:46,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-13 19:23:46,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:46,285 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2074380679, now seen corresponding path program 17 times [2021-10-13 19:23:46,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:46,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047652305] [2021-10-13 19:23:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:46,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:46,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:46,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047652305] [2021-10-13 19:23:46,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047652305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:46,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066001950] [2021-10-13 19:23:46,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:23:46,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:46,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:46,819 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:46,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-13 19:23:47,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:23:47,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:47,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 19:23:47,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:48,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066001950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:48,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:48,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 29 [2021-10-13 19:23:48,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001537983] [2021-10-13 19:23:48,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:23:48,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:48,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:23:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:23:48,980 INFO L87 Difference]: Start difference. First operand 211 states and 479 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:51,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:51,173 INFO L93 Difference]: Finished difference Result 264 states and 569 transitions. [2021-10-13 19:23:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 19:23:51,174 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:23:51,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:51,176 INFO L225 Difference]: With dead ends: 264 [2021-10-13 19:23:51,177 INFO L226 Difference]: Without dead ends: 244 [2021-10-13 19:23:51,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 2340.6ms TimeCoverageRelationStatistics Valid=300, Invalid=2352, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 19:23:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-13 19:23:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 205. [2021-10-13 19:23:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 2.2857142857142856) internal successors, (464), 204 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 464 transitions. [2021-10-13 19:23:51,183 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 464 transitions. Word has length 18 [2021-10-13 19:23:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:51,183 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 464 transitions. [2021-10-13 19:23:51,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 464 transitions. [2021-10-13 19:23:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:51,184 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:51,184 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:51,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-13 19:23:51,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-13 19:23:51,386 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:51,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2074261639, now seen corresponding path program 18 times [2021-10-13 19:23:51,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:51,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740179089] [2021-10-13 19:23:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:51,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:51,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:51,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740179089] [2021-10-13 19:23:51,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740179089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:51,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942055] [2021-10-13 19:23:51,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:23:51,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:51,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:51,897 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:51,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 19:23:53,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-13 19:23:53,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:23:53,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 19:23:53,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:54,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942055] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:54,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:54,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 29 [2021-10-13 19:23:54,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813095370] [2021-10-13 19:23:54,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:23:54,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:23:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:23:54,461 INFO L87 Difference]: Start difference. First operand 205 states and 464 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:23:56,476 INFO L93 Difference]: Finished difference Result 227 states and 495 transitions. [2021-10-13 19:23:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 19:23:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:23:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:23:56,478 INFO L225 Difference]: With dead ends: 227 [2021-10-13 19:23:56,479 INFO L226 Difference]: Without dead ends: 211 [2021-10-13 19:23:56,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2270.9ms TimeCoverageRelationStatistics Valid=261, Invalid=2391, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 19:23:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-13 19:23:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 195. [2021-10-13 19:23:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 2.305699481865285) internal successors, (445), 194 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 445 transitions. [2021-10-13 19:23:56,483 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 445 transitions. Word has length 18 [2021-10-13 19:23:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:23:56,483 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 445 transitions. [2021-10-13 19:23:56,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:23:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 445 transitions. [2021-10-13 19:23:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:23:56,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:23:56,484 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:23:56,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-13 19:23:56,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-13 19:23:56,685 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:23:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:23:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1361117438, now seen corresponding path program 19 times [2021-10-13 19:23:56,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:23:56,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323573777] [2021-10-13 19:23:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:23:56,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:23:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:57,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:23:57,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323573777] [2021-10-13 19:23:57,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323573777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:57,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664424871] [2021-10-13 19:23:57,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:23:57,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:23:57,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:23:57,172 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:23:57,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-13 19:23:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:23:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-13 19:23:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:23:58,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:23:58,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-13 19:23:58,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-13 19:23:58,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:23:58,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 19:23:58,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:23:58,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 19:23:58,771 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:23:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-13 19:23:58,857 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:23:58,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 19:23:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:23:59,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664424871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:23:59,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:23:59,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:23:59,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346499781] [2021-10-13 19:23:59,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:23:59,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:23:59,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:23:59,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:23:59,770 INFO L87 Difference]: Start difference. First operand 195 states and 445 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:01,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:01,326 INFO L93 Difference]: Finished difference Result 220 states and 475 transitions. [2021-10-13 19:24:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:24:01,326 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:24:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:01,327 INFO L225 Difference]: With dead ends: 220 [2021-10-13 19:24:01,327 INFO L226 Difference]: Without dead ends: 202 [2021-10-13 19:24:01,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1928.3ms TimeCoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:24:01,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-10-13 19:24:01,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 175. [2021-10-13 19:24:01,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 173 states have (on average 2.3179190751445087) internal successors, (401), 174 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 401 transitions. [2021-10-13 19:24:01,333 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 401 transitions. Word has length 18 [2021-10-13 19:24:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:01,333 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 401 transitions. [2021-10-13 19:24:01,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 401 transitions. [2021-10-13 19:24:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:24:01,334 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:01,334 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:01,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:01,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:01,550 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:01,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1361117441, now seen corresponding path program 19 times [2021-10-13 19:24:01,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:01,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24121359] [2021-10-13 19:24:01,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:01,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:01,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:24:01,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24121359] [2021-10-13 19:24:01,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24121359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:01,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238840870] [2021-10-13 19:24:01,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:24:01,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:01,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:24:01,943 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:24:01,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-13 19:24:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:03,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-13 19:24:03,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:24:03,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:24:03,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-13 19:24:03,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 19:24:03,548 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:24:03,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 19:24:03,644 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:24:03,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 19:24:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:04,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238840870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:04,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:24:04,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-13 19:24:04,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674157431] [2021-10-13 19:24:04,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:24:04,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:24:04,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:24:04,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:24:04,710 INFO L87 Difference]: Start difference. First operand 175 states and 401 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:06,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:06,665 INFO L93 Difference]: Finished difference Result 194 states and 430 transitions. [2021-10-13 19:24:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:24:06,666 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:24:06,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:06,667 INFO L225 Difference]: With dead ends: 194 [2021-10-13 19:24:06,667 INFO L226 Difference]: Without dead ends: 166 [2021-10-13 19:24:06,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 2399.2ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 19:24:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-13 19:24:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-10-13 19:24:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 163 states have (on average 2.331288343558282) internal successors, (380), 164 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 380 transitions. [2021-10-13 19:24:06,672 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 380 transitions. Word has length 18 [2021-10-13 19:24:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:06,672 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 380 transitions. [2021-10-13 19:24:06,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 380 transitions. [2021-10-13 19:24:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:24:06,673 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:06,673 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:06,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:06,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-13 19:24:06,875 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:06,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1731809898, now seen corresponding path program 20 times [2021-10-13 19:24:06,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:06,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006909647] [2021-10-13 19:24:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:06,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:07,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:24:07,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006909647] [2021-10-13 19:24:07,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006909647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:07,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764587857] [2021-10-13 19:24:07,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:24:07,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:07,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:24:07,583 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:24:07,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-13 19:24:08,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:24:08,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:24:08,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 19:24:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:24:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:24:09,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764587857] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:09,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:24:09,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2021-10-13 19:24:09,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958538064] [2021-10-13 19:24:09,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:24:09,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:24:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:24:09,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:24:09,551 INFO L87 Difference]: Start difference. First operand 165 states and 380 transitions. Second operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:10,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:10,711 INFO L93 Difference]: Finished difference Result 183 states and 421 transitions. [2021-10-13 19:24:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:24:10,712 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:24:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:10,713 INFO L225 Difference]: With dead ends: 183 [2021-10-13 19:24:10,713 INFO L226 Difference]: Without dead ends: 183 [2021-10-13 19:24:10,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1325.7ms TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 19:24:10,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-10-13 19:24:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 157. [2021-10-13 19:24:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 155 states have (on average 2.296774193548387) internal successors, (356), 156 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 356 transitions. [2021-10-13 19:24:10,717 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 356 transitions. Word has length 18 [2021-10-13 19:24:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:10,717 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 356 transitions. [2021-10-13 19:24:10,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 356 transitions. [2021-10-13 19:24:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 19:24:10,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:10,718 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:10,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:10,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:10,919 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:10,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1846441701, now seen corresponding path program 20 times [2021-10-13 19:24:10,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:10,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784732764] [2021-10-13 19:24:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:10,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:14,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:24:14,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784732764] [2021-10-13 19:24:14,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784732764] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:14,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515270063] [2021-10-13 19:24:14,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:24:14,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:14,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:24:14,733 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:24:14,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-13 19:24:16,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:24:16,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:24:16,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 19:24:16,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:24:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:24:16,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515270063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:16,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:24:16,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-10-13 19:24:16,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714941142] [2021-10-13 19:24:16,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 19:24:16,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:24:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 19:24:16,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:24:16,840 INFO L87 Difference]: Start difference. First operand 157 states and 356 transitions. Second operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:18,508 INFO L93 Difference]: Finished difference Result 183 states and 413 transitions. [2021-10-13 19:24:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 19:24:18,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 19:24:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:18,510 INFO L225 Difference]: With dead ends: 183 [2021-10-13 19:24:18,510 INFO L226 Difference]: Without dead ends: 183 [2021-10-13 19:24:18,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 2225.2ms TimeCoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 19:24:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-10-13 19:24:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2021-10-13 19:24:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 151 states have (on average 2.2649006622516556) internal successors, (342), 152 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 342 transitions. [2021-10-13 19:24:18,514 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 342 transitions. Word has length 18 [2021-10-13 19:24:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:18,514 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 342 transitions. [2021-10-13 19:24:18,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 342 transitions. [2021-10-13 19:24:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:24:18,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:18,515 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:18,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:18,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-13 19:24:18,731 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:18,732 INFO L82 PathProgramCache]: Analyzing trace with hash 981868413, now seen corresponding path program 21 times [2021-10-13 19:24:18,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:18,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014524820] [2021-10-13 19:24:18,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:18,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:24:18,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:24:18,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014524820] [2021-10-13 19:24:18,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014524820] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:18,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815765271] [2021-10-13 19:24:18,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:24:18,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:18,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:24:18,889 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:24:18,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-13 19:24:20,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:24:20,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:24:20,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 19:24:20,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:24:20,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 20 [2021-10-13 19:24:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:24:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815765271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:20,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:24:20,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-13 19:24:20,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690512071] [2021-10-13 19:24:20,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:24:20,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:24:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:24:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:24:20,776 INFO L87 Difference]: Start difference. First operand 153 states and 342 transitions. Second operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:21,073 INFO L93 Difference]: Finished difference Result 153 states and 338 transitions. [2021-10-13 19:24:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 19:24:21,074 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:24:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:21,076 INFO L225 Difference]: With dead ends: 153 [2021-10-13 19:24:21,076 INFO L226 Difference]: Without dead ends: 126 [2021-10-13 19:24:21,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 481.1ms TimeCoverageRelationStatistics Valid=224, Invalid=966, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:24:21,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-13 19:24:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-10-13 19:24:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 2.403225806451613) internal successors, (298), 125 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 298 transitions. [2021-10-13 19:24:21,080 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 298 transitions. Word has length 19 [2021-10-13 19:24:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:21,080 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 298 transitions. [2021-10-13 19:24:21,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 298 transitions. [2021-10-13 19:24:21,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:24:21,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:21,081 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:21,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:21,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-10-13 19:24:21,287 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:21,287 INFO L82 PathProgramCache]: Analyzing trace with hash 2146499982, now seen corresponding path program 21 times [2021-10-13 19:24:21,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:21,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511565382] [2021-10-13 19:24:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:21,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:24,715 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:24,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:24:24,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511565382] [2021-10-13 19:24:24,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511565382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:24,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271364493] [2021-10-13 19:24:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:24:24,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:24:24,721 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:24:24,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-13 19:24:26,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:24:26,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:24:26,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 19:24:26,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:24:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 19:24:27,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271364493] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:27,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:24:27,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 25 [2021-10-13 19:24:27,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406933936] [2021-10-13 19:24:27,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 19:24:27,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:24:27,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 19:24:27,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:24:27,274 INFO L87 Difference]: Start difference. First operand 126 states and 298 transitions. Second operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:30,234 INFO L93 Difference]: Finished difference Result 228 states and 545 transitions. [2021-10-13 19:24:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 19:24:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:24:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:30,236 INFO L225 Difference]: With dead ends: 228 [2021-10-13 19:24:30,236 INFO L226 Difference]: Without dead ends: 224 [2021-10-13 19:24:30,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 3330.2ms TimeCoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 19:24:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-10-13 19:24:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 166. [2021-10-13 19:24:30,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 164 states have (on average 2.573170731707317) internal successors, (422), 165 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:30,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 422 transitions. [2021-10-13 19:24:30,242 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 422 transitions. Word has length 19 [2021-10-13 19:24:30,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:30,242 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 422 transitions. [2021-10-13 19:24:30,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:30,242 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 422 transitions. [2021-10-13 19:24:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:24:30,243 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:30,243 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:30,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:30,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:30,457 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:30,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2146499985, now seen corresponding path program 22 times [2021-10-13 19:24:30,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:30,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806579395] [2021-10-13 19:24:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:30,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:31,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:24:31,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806579395] [2021-10-13 19:24:31,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806579395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:31,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435672512] [2021-10-13 19:24:31,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:24:31,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:31,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:24:31,463 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:24:31,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-13 19:24:32,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:24:32,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:24:32,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 19:24:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:24:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:24:33,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435672512] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:33,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:24:33,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 27 [2021-10-13 19:24:33,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379467881] [2021-10-13 19:24:33,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 19:24:33,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:24:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 19:24:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-10-13 19:24:33,828 INFO L87 Difference]: Start difference. First operand 166 states and 422 transitions. Second operand has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:36,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:36,072 INFO L93 Difference]: Finished difference Result 224 states and 551 transitions. [2021-10-13 19:24:36,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 19:24:36,073 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:24:36,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:36,075 INFO L225 Difference]: With dead ends: 224 [2021-10-13 19:24:36,075 INFO L226 Difference]: Without dead ends: 208 [2021-10-13 19:24:36,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 2550.4ms TimeCoverageRelationStatistics Valid=275, Invalid=2175, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 19:24:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-13 19:24:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 180. [2021-10-13 19:24:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 2.5112359550561796) internal successors, (447), 179 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 447 transitions. [2021-10-13 19:24:36,080 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 447 transitions. Word has length 19 [2021-10-13 19:24:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:36,081 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 447 transitions. [2021-10-13 19:24:36,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 447 transitions. [2021-10-13 19:24:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:24:36,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:36,082 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:36,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:36,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-13 19:24:36,293 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:36,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:36,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2144892394, now seen corresponding path program 22 times [2021-10-13 19:24:36,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:36,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180961430] [2021-10-13 19:24:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:36,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:37,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:24:37,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180961430] [2021-10-13 19:24:37,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180961430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:37,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055170094] [2021-10-13 19:24:37,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:24:37,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:37,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:24:37,993 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:24:37,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-13 19:24:39,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:24:39,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:24:39,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 19:24:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:24:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:24:40,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055170094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:40,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:24:40,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-10-13 19:24:40,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497985919] [2021-10-13 19:24:40,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:24:40,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:24:40,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:24:40,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:24:40,749 INFO L87 Difference]: Start difference. First operand 180 states and 447 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:43,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:43,722 INFO L93 Difference]: Finished difference Result 406 states and 994 transitions. [2021-10-13 19:24:43,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 19:24:43,723 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:24:43,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:43,725 INFO L225 Difference]: With dead ends: 406 [2021-10-13 19:24:43,725 INFO L226 Difference]: Without dead ends: 402 [2021-10-13 19:24:43,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 3374.8ms TimeCoverageRelationStatistics Valid=303, Invalid=2453, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 19:24:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-10-13 19:24:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-10-13 19:24:43,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 252 states have (on average 2.8253968253968256) internal successors, (712), 253 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 712 transitions. [2021-10-13 19:24:43,731 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 712 transitions. Word has length 19 [2021-10-13 19:24:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:43,731 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 712 transitions. [2021-10-13 19:24:43,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 712 transitions. [2021-10-13 19:24:43,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:24:43,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:43,732 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:43,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:43,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:43,933 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:43,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2144892391, now seen corresponding path program 23 times [2021-10-13 19:24:43,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:43,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960093897] [2021-10-13 19:24:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:43,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:44,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:24:44,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960093897] [2021-10-13 19:24:44,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960093897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:44,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662105599] [2021-10-13 19:24:44,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:24:44,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:44,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:24:44,786 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:24:44,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-13 19:24:46,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:24:46,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:24:46,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 19:24:46,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:24:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:47,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662105599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:47,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:24:47,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-13 19:24:47,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303387132] [2021-10-13 19:24:47,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:24:47,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:24:47,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:24:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:24:47,724 INFO L87 Difference]: Start difference. First operand 254 states and 712 transitions. Second operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:50,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:50,689 INFO L93 Difference]: Finished difference Result 531 states and 1410 transitions. [2021-10-13 19:24:50,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 19:24:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:24:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:50,693 INFO L225 Difference]: With dead ends: 531 [2021-10-13 19:24:50,693 INFO L226 Difference]: Without dead ends: 513 [2021-10-13 19:24:50,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 3126.6ms TimeCoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 19:24:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-10-13 19:24:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 364. [2021-10-13 19:24:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 362 states have (on average 3.0193370165745854) internal successors, (1093), 363 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1093 transitions. [2021-10-13 19:24:50,704 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1093 transitions. Word has length 19 [2021-10-13 19:24:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:50,704 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1093 transitions. [2021-10-13 19:24:50,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1093 transitions. [2021-10-13 19:24:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:24:50,705 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:50,705 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:50,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:50,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-13 19:24:50,906 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:50,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2144773351, now seen corresponding path program 24 times [2021-10-13 19:24:50,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:50,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032217554] [2021-10-13 19:24:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:50,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:24:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:24:52,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:24:52,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032217554] [2021-10-13 19:24:52,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032217554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:52,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577726060] [2021-10-13 19:24:52,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:24:52,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:52,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:24:52,691 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:24:52,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-13 19:24:54,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:24:54,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:24:54,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 19:24:54,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:24:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:24:55,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577726060] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:24:55,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:24:55,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-10-13 19:24:55,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013680278] [2021-10-13 19:24:55,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:24:55,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:24:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:24:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:24:55,234 INFO L87 Difference]: Start difference. First operand 364 states and 1093 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:24:57,537 INFO L93 Difference]: Finished difference Result 422 states and 1234 transitions. [2021-10-13 19:24:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 19:24:57,537 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:24:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:24:57,541 INFO L225 Difference]: With dead ends: 422 [2021-10-13 19:24:57,541 INFO L226 Difference]: Without dead ends: 414 [2021-10-13 19:24:57,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2710.9ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 19:24:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-10-13 19:24:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 362. [2021-10-13 19:24:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 2.9722222222222223) internal successors, (1070), 361 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1070 transitions. [2021-10-13 19:24:57,551 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1070 transitions. Word has length 19 [2021-10-13 19:24:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:24:57,552 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1070 transitions. [2021-10-13 19:24:57,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:24:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1070 transitions. [2021-10-13 19:24:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:24:57,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:24:57,553 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:24:57,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-13 19:24:57,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:24:57,765 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:24:57,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:24:57,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2034069874, now seen corresponding path program 23 times [2021-10-13 19:24:57,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:24:57,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317396118] [2021-10-13 19:24:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:24:57,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:24:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:00,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:25:00,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317396118] [2021-10-13 19:25:00,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317396118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:00,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303653885] [2021-10-13 19:25:00,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:25:00,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:00,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:25:00,580 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:25:00,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-13 19:25:02,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:25:02,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:25:02,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 19:25:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:25:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:25:03,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303653885] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:03,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:25:03,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-13 19:25:03,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078709410] [2021-10-13 19:25:03,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:25:03,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:25:03,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:25:03,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=801, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:25:03,421 INFO L87 Difference]: Start difference. First operand 362 states and 1070 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:06,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:25:06,634 INFO L93 Difference]: Finished difference Result 608 states and 1643 transitions. [2021-10-13 19:25:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 19:25:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:25:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:25:06,638 INFO L225 Difference]: With dead ends: 608 [2021-10-13 19:25:06,639 INFO L226 Difference]: Without dead ends: 604 [2021-10-13 19:25:06,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 3337.4ms TimeCoverageRelationStatistics Valid=299, Invalid=2563, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 19:25:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-10-13 19:25:06,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 418. [2021-10-13 19:25:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 416 states have (on average 3.0576923076923075) internal successors, (1272), 417 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1272 transitions. [2021-10-13 19:25:06,654 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1272 transitions. Word has length 19 [2021-10-13 19:25:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:25:06,655 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1272 transitions. [2021-10-13 19:25:06,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1272 transitions. [2021-10-13 19:25:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:25:06,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:25:06,656 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:25:06,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-13 19:25:06,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-13 19:25:06,871 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:25:06,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:25:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2034069871, now seen corresponding path program 25 times [2021-10-13 19:25:06,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:25:06,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417388433] [2021-10-13 19:25:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:25:06,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:25:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:07,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:25:07,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417388433] [2021-10-13 19:25:07,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417388433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:07,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501815219] [2021-10-13 19:25:07,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:25:07,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:07,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:25:07,755 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:25:07,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-13 19:25:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:09,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 19:25:09,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:25:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:25:10,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501815219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:10,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:25:10,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-13 19:25:10,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136097001] [2021-10-13 19:25:10,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:25:10,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:25:10,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:25:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:25:10,299 INFO L87 Difference]: Start difference. First operand 418 states and 1272 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:12,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:25:12,412 INFO L93 Difference]: Finished difference Result 550 states and 1544 transitions. [2021-10-13 19:25:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 19:25:12,412 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:25:12,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:25:12,415 INFO L225 Difference]: With dead ends: 550 [2021-10-13 19:25:12,416 INFO L226 Difference]: Without dead ends: 510 [2021-10-13 19:25:12,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2282.7ms TimeCoverageRelationStatistics Valid=279, Invalid=2171, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 19:25:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-10-13 19:25:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 436. [2021-10-13 19:25:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 434 states have (on average 2.942396313364055) internal successors, (1277), 435 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:12,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1277 transitions. [2021-10-13 19:25:12,426 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1277 transitions. Word has length 19 [2021-10-13 19:25:12,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:25:12,426 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1277 transitions. [2021-10-13 19:25:12,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:12,426 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1277 transitions. [2021-10-13 19:25:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:25:12,427 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:25:12,428 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:25:12,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-13 19:25:12,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-13 19:25:12,633 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:25:12,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:25:12,634 INFO L82 PathProgramCache]: Analyzing trace with hash -2033950834, now seen corresponding path program 24 times [2021-10-13 19:25:12,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:25:12,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934847365] [2021-10-13 19:25:12,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:25:12,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:25:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:14,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:25:14,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934847365] [2021-10-13 19:25:14,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934847365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:14,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358741016] [2021-10-13 19:25:14,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:25:14,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:14,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:25:14,585 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:25:14,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-13 19:25:16,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:25:16,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:25:16,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 19:25:16,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:25:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:25:17,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358741016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:17,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:25:17,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-10-13 19:25:17,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50870592] [2021-10-13 19:25:17,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:25:17,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:25:17,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:25:17,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:25:17,494 INFO L87 Difference]: Start difference. First operand 436 states and 1277 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:25:20,395 INFO L93 Difference]: Finished difference Result 642 states and 1736 transitions. [2021-10-13 19:25:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:25:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:25:20,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:25:20,399 INFO L225 Difference]: With dead ends: 642 [2021-10-13 19:25:20,399 INFO L226 Difference]: Without dead ends: 642 [2021-10-13 19:25:20,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 3182.4ms TimeCoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 19:25:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-10-13 19:25:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 478. [2021-10-13 19:25:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 476 states have (on average 3.004201680672269) internal successors, (1430), 477 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:20,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1430 transitions. [2021-10-13 19:25:20,412 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1430 transitions. Word has length 19 [2021-10-13 19:25:20,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:25:20,413 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1430 transitions. [2021-10-13 19:25:20,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:20,413 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1430 transitions. [2021-10-13 19:25:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:25:20,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:25:20,414 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:25:20,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-13 19:25:20,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-13 19:25:20,628 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:25:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:25:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2033950831, now seen corresponding path program 26 times [2021-10-13 19:25:20,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:25:20,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454788457] [2021-10-13 19:25:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:25:20,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:25:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:22,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:25:22,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454788457] [2021-10-13 19:25:22,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454788457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:22,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221582429] [2021-10-13 19:25:22,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:25:22,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:22,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:25:22,370 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:25:22,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-13 19:25:24,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:25:24,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:25:24,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 19:25:24,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:25:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:25:25,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221582429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:25,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:25:25,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-13 19:25:25,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560524703] [2021-10-13 19:25:25,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:25:25,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:25:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:25:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:25:25,211 INFO L87 Difference]: Start difference. First operand 478 states and 1430 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:25:27,977 INFO L93 Difference]: Finished difference Result 640 states and 1739 transitions. [2021-10-13 19:25:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:25:27,977 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:25:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:25:27,983 INFO L225 Difference]: With dead ends: 640 [2021-10-13 19:25:27,983 INFO L226 Difference]: Without dead ends: 626 [2021-10-13 19:25:27,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3063.7ms TimeCoverageRelationStatistics Valid=242, Invalid=2514, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 19:25:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-10-13 19:25:27,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 502. [2021-10-13 19:25:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 500 states have (on average 2.928) internal successors, (1464), 501 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1464 transitions. [2021-10-13 19:25:27,996 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1464 transitions. Word has length 19 [2021-10-13 19:25:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:25:27,996 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1464 transitions. [2021-10-13 19:25:27,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1464 transitions. [2021-10-13 19:25:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:25:27,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:25:27,998 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:25:28,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-10-13 19:25:28,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:28,211 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:25:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:25:28,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1401428246, now seen corresponding path program 25 times [2021-10-13 19:25:28,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:25:28,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989330000] [2021-10-13 19:25:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:25:28,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:25:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:31,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:25:31,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989330000] [2021-10-13 19:25:31,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989330000] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:31,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593924226] [2021-10-13 19:25:31,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:25:31,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:31,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:25:31,373 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:25:31,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-13 19:25:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 19:25:33,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:25:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:25:34,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593924226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:34,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:25:34,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-13 19:25:34,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760729754] [2021-10-13 19:25:34,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:25:34,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:25:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:25:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:25:34,129 INFO L87 Difference]: Start difference. First operand 502 states and 1464 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:25:37,553 INFO L93 Difference]: Finished difference Result 700 states and 1907 transitions. [2021-10-13 19:25:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:25:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:25:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:25:37,568 INFO L225 Difference]: With dead ends: 700 [2021-10-13 19:25:37,568 INFO L226 Difference]: Without dead ends: 696 [2021-10-13 19:25:37,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 3694.7ms TimeCoverageRelationStatistics Valid=313, Invalid=2549, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 19:25:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-10-13 19:25:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 538. [2021-10-13 19:25:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 536 states have (on average 2.951492537313433) internal successors, (1582), 537 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1582 transitions. [2021-10-13 19:25:37,593 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1582 transitions. Word has length 19 [2021-10-13 19:25:37,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:25:37,593 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1582 transitions. [2021-10-13 19:25:37,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1582 transitions. [2021-10-13 19:25:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:25:37,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:25:37,595 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:25:37,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-13 19:25:37,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:37,809 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:25:37,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:25:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1401428249, now seen corresponding path program 27 times [2021-10-13 19:25:37,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:25:37,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925864042] [2021-10-13 19:25:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:25:37,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:25:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:38,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:25:38,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925864042] [2021-10-13 19:25:38,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925864042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:38,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144698176] [2021-10-13 19:25:38,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:25:38,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:38,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:25:38,770 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:25:38,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-13 19:25:40,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:25:40,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:25:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 19:25:40,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:25:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 19:25:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144698176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:41,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:25:41,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 24 [2021-10-13 19:25:41,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693663342] [2021-10-13 19:25:41,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:25:41,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:25:41,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:25:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:25:41,443 INFO L87 Difference]: Start difference. First operand 538 states and 1582 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:25:43,496 INFO L93 Difference]: Finished difference Result 720 states and 1985 transitions. [2021-10-13 19:25:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 19:25:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:25:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:25:43,500 INFO L225 Difference]: With dead ends: 720 [2021-10-13 19:25:43,500 INFO L226 Difference]: Without dead ends: 700 [2021-10-13 19:25:43,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1919.2ms TimeCoverageRelationStatistics Valid=263, Invalid=1807, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:25:43,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-10-13 19:25:43,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 578. [2021-10-13 19:25:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 576 states have (on average 2.9722222222222223) internal successors, (1712), 577 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:43,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1712 transitions. [2021-10-13 19:25:43,513 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1712 transitions. Word has length 19 [2021-10-13 19:25:43,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:25:43,513 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1712 transitions. [2021-10-13 19:25:43,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:43,514 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1712 transitions. [2021-10-13 19:25:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 19:25:43,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:25:43,515 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:25:43,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-13 19:25:43,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-10-13 19:25:43,730 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:25:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:25:43,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1401547289, now seen corresponding path program 28 times [2021-10-13 19:25:43,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:25:43,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689492547] [2021-10-13 19:25:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:25:43,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:25:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:44,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:25:44,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689492547] [2021-10-13 19:25:44,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689492547] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:44,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456139910] [2021-10-13 19:25:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:25:44,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:44,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:25:44,649 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:25:44,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-13 19:25:46,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:25:46,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:25:46,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 19:25:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:25:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-13 19:25:47,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456139910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:47,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:25:47,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 25 [2021-10-13 19:25:47,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062037930] [2021-10-13 19:25:47,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 19:25:47,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:25:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 19:25:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:25:47,403 INFO L87 Difference]: Start difference. First operand 578 states and 1712 transitions. Second operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:25:49,350 INFO L93 Difference]: Finished difference Result 680 states and 1937 transitions. [2021-10-13 19:25:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:25:49,350 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 19:25:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:25:49,356 INFO L225 Difference]: With dead ends: 680 [2021-10-13 19:25:49,356 INFO L226 Difference]: Without dead ends: 660 [2021-10-13 19:25:49,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2119.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:25:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-10-13 19:25:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 622. [2021-10-13 19:25:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 620 states have (on average 2.8967741935483873) internal successors, (1796), 621 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1796 transitions. [2021-10-13 19:25:49,371 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1796 transitions. Word has length 19 [2021-10-13 19:25:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:25:49,371 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1796 transitions. [2021-10-13 19:25:49,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1796 transitions. [2021-10-13 19:25:49,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:25:49,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:25:49,372 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:25:49,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-13 19:25:49,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:49,586 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:25:49,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:25:49,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2113296614, now seen corresponding path program 26 times [2021-10-13 19:25:49,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:25:49,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572704607] [2021-10-13 19:25:49,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:25:49,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:25:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:50,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:25:50,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572704607] [2021-10-13 19:25:50,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572704607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:50,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607078212] [2021-10-13 19:25:50,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:25:50,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:50,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:25:50,907 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:25:50,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-13 19:25:52,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:25:52,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:25:52,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-13 19:25:52,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:25:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:25:52,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2021-10-13 19:25:52,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:25:52,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:25:53,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-13 19:25:53,120 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-13 19:25:53,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 49 [2021-10-13 19:25:53,285 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:25:53,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-10-13 19:25:53,462 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:25:53,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-10-13 19:25:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:54,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607078212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:54,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:25:54,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 33 [2021-10-13 19:25:54,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136224447] [2021-10-13 19:25:54,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 19:25:54,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:25:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 19:25:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:25:54,927 INFO L87 Difference]: Start difference. First operand 622 states and 1796 transitions. Second operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:25:57,579 INFO L93 Difference]: Finished difference Result 708 states and 2017 transitions. [2021-10-13 19:25:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 19:25:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:25:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:25:57,585 INFO L225 Difference]: With dead ends: 708 [2021-10-13 19:25:57,585 INFO L226 Difference]: Without dead ends: 708 [2021-10-13 19:25:57,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 3251.5ms TimeCoverageRelationStatistics Valid=258, Invalid=2498, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 19:25:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-10-13 19:25:57,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 648. [2021-10-13 19:25:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 646 states have (on average 2.9055727554179565) internal successors, (1877), 647 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1877 transitions. [2021-10-13 19:25:57,602 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1877 transitions. Word has length 20 [2021-10-13 19:25:57,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:25:57,602 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1877 transitions. [2021-10-13 19:25:57,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:25:57,602 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1877 transitions. [2021-10-13 19:25:57,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:25:57,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:25:57,604 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:25:57,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-10-13 19:25:57,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:57,805 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:25:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:25:57,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2116871534, now seen corresponding path program 27 times [2021-10-13 19:25:57,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:25:57,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539486672] [2021-10-13 19:25:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:25:57,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:25:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:25:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:25:58,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:25:58,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539486672] [2021-10-13 19:25:58,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539486672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:25:58,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754401790] [2021-10-13 19:25:58,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:25:58,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:25:58,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:25:58,618 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:25:58,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-13 19:26:00,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:26:00,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:26:00,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 19:26:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:26:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 19:26:01,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754401790] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:01,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:26:01,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 27 [2021-10-13 19:26:01,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691505487] [2021-10-13 19:26:01,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 19:26:01,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:26:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 19:26:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-10-13 19:26:01,896 INFO L87 Difference]: Start difference. First operand 648 states and 1877 transitions. Second operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:26:06,022 INFO L93 Difference]: Finished difference Result 1466 states and 4036 transitions. [2021-10-13 19:26:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-13 19:26:06,022 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:26:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:26:06,028 INFO L225 Difference]: With dead ends: 1466 [2021-10-13 19:26:06,028 INFO L226 Difference]: Without dead ends: 1466 [2021-10-13 19:26:06,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3545.1ms TimeCoverageRelationStatistics Valid=364, Invalid=3542, Unknown=0, NotChecked=0, Total=3906 [2021-10-13 19:26:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-10-13 19:26:06,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 836. [2021-10-13 19:26:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 834 states have (on average 3.142685851318945) internal successors, (2621), 835 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2621 transitions. [2021-10-13 19:26:06,059 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2621 transitions. Word has length 20 [2021-10-13 19:26:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:26:06,059 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 2621 transitions. [2021-10-13 19:26:06,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2621 transitions. [2021-10-13 19:26:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:26:06,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:26:06,061 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:26:06,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-13 19:26:06,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-13 19:26:06,262 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:26:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:26:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2063579282, now seen corresponding path program 28 times [2021-10-13 19:26:06,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:26:06,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603883416] [2021-10-13 19:26:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:26:06,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:26:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:26:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:07,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:26:07,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603883416] [2021-10-13 19:26:07,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603883416] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:07,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205582903] [2021-10-13 19:26:07,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:26:07,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:26:07,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:26:07,643 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:26:07,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-13 19:26:09,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:26:09,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:26:09,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 19:26:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:26:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:11,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205582903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:11,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:26:11,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 33 [2021-10-13 19:26:11,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43957590] [2021-10-13 19:26:11,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 19:26:11,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:26:11,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 19:26:11,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:26:11,219 INFO L87 Difference]: Start difference. First operand 836 states and 2621 transitions. Second operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:17,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:26:17,686 INFO L93 Difference]: Finished difference Result 1698 states and 5144 transitions. [2021-10-13 19:26:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 19:26:17,687 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:26:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:26:17,692 INFO L225 Difference]: With dead ends: 1698 [2021-10-13 19:26:17,692 INFO L226 Difference]: Without dead ends: 1698 [2021-10-13 19:26:17,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 6291.8ms TimeCoverageRelationStatistics Valid=571, Invalid=4831, Unknown=0, NotChecked=0, Total=5402 [2021-10-13 19:26:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-10-13 19:26:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1108. [2021-10-13 19:26:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1106 states have (on average 3.3951175406871608) internal successors, (3755), 1107 states have internal predecessors, (3755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:17,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3755 transitions. [2021-10-13 19:26:17,720 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3755 transitions. Word has length 20 [2021-10-13 19:26:17,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:26:17,721 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 3755 transitions. [2021-10-13 19:26:17,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:17,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3755 transitions. [2021-10-13 19:26:17,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:26:17,722 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:26:17,722 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:26:17,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-13 19:26:17,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-10-13 19:26:17,935 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:26:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:26:17,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2063463962, now seen corresponding path program 29 times [2021-10-13 19:26:17,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:26:17,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778241952] [2021-10-13 19:26:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:26:17,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:26:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:26:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:19,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:26:19,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778241952] [2021-10-13 19:26:19,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778241952] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:19,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343859803] [2021-10-13 19:26:19,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:26:19,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:26:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:26:19,754 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:26:19,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-13 19:26:21,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:26:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:26:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 19:26:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:26:21,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 134 [2021-10-13 19:26:22,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-13 19:26:22,179 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-13 19:26:22,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 49 [2021-10-13 19:26:22,346 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:26:22,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2021-10-13 19:26:22,518 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:26:22,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-10-13 19:26:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:24,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343859803] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:24,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:26:24,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-13 19:26:24,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454463342] [2021-10-13 19:26:24,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 19:26:24,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:26:24,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 19:26:24,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 19:26:24,206 INFO L87 Difference]: Start difference. First operand 1108 states and 3755 transitions. Second operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:26:30,369 INFO L93 Difference]: Finished difference Result 1621 states and 5286 transitions. [2021-10-13 19:26:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 19:26:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:26:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:26:30,375 INFO L225 Difference]: With dead ends: 1621 [2021-10-13 19:26:30,375 INFO L226 Difference]: Without dead ends: 1609 [2021-10-13 19:26:30,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 6200.8ms TimeCoverageRelationStatistics Valid=585, Invalid=4671, Unknown=0, NotChecked=0, Total=5256 [2021-10-13 19:26:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-10-13 19:26:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1236. [2021-10-13 19:26:30,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1234 states have (on average 3.4643435980551054) internal successors, (4275), 1235 states have internal predecessors, (4275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4275 transitions. [2021-10-13 19:26:30,411 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4275 transitions. Word has length 20 [2021-10-13 19:26:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:26:30,411 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 4275 transitions. [2021-10-13 19:26:30,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4275 transitions. [2021-10-13 19:26:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:26:30,413 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:26:30,413 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:26:30,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-10-13 19:26:30,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:26:30,629 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:26:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:26:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1368224878, now seen corresponding path program 30 times [2021-10-13 19:26:30,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:26:30,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627051929] [2021-10-13 19:26:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:26:30,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:26:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:26:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:31,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:26:31,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627051929] [2021-10-13 19:26:31,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627051929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:31,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168450732] [2021-10-13 19:26:31,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:26:31,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:26:31,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:26:31,765 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:26:31,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-13 19:26:33,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:26:33,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:26:33,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 19:26:33,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:26:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:35,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168450732] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:35,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:26:35,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 33 [2021-10-13 19:26:35,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747312737] [2021-10-13 19:26:35,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 19:26:35,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:26:35,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 19:26:35,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:26:35,310 INFO L87 Difference]: Start difference. First operand 1236 states and 4275 transitions. Second operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:41,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:26:41,922 INFO L93 Difference]: Finished difference Result 2268 states and 7155 transitions. [2021-10-13 19:26:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 19:26:41,922 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:26:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:26:41,928 INFO L225 Difference]: With dead ends: 2268 [2021-10-13 19:26:41,929 INFO L226 Difference]: Without dead ends: 2252 [2021-10-13 19:26:41,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 5942.4ms TimeCoverageRelationStatistics Valid=576, Invalid=6564, Unknown=0, NotChecked=0, Total=7140 [2021-10-13 19:26:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-10-13 19:26:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1388. [2021-10-13 19:26:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1386 states have (on average 3.559163059163059) internal successors, (4933), 1387 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4933 transitions. [2021-10-13 19:26:41,971 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4933 transitions. Word has length 20 [2021-10-13 19:26:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:26:41,971 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 4933 transitions. [2021-10-13 19:26:41,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4933 transitions. [2021-10-13 19:26:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:26:41,973 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:26:41,973 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:26:42,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-10-13 19:26:42,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-13 19:26:42,187 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:26:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:26:42,188 INFO L82 PathProgramCache]: Analyzing trace with hash 498174438, now seen corresponding path program 31 times [2021-10-13 19:26:42,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:26:42,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106143503] [2021-10-13 19:26:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:26:42,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:26:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:26:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:43,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:26:43,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106143503] [2021-10-13 19:26:43,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106143503] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:43,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113621734] [2021-10-13 19:26:43,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:26:43,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:26:43,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:26:43,026 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:26:43,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-13 19:26:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:26:45,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 19:26:45,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:26:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:26:45,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-13 19:26:45,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-13 19:26:45,510 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-13 19:26:45,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 49 [2021-10-13 19:26:45,673 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:26:45,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-10-13 19:26:45,828 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:26:45,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-10-13 19:26:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113621734] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:47,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:26:47,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 33 [2021-10-13 19:26:47,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743920041] [2021-10-13 19:26:47,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 19:26:47,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:26:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 19:26:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1090, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:26:47,407 INFO L87 Difference]: Start difference. First operand 1388 states and 4933 transitions. Second operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:52,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:26:52,354 INFO L93 Difference]: Finished difference Result 1862 states and 6170 transitions. [2021-10-13 19:26:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 19:26:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:26:52,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:26:52,359 INFO L225 Difference]: With dead ends: 1862 [2021-10-13 19:26:52,360 INFO L226 Difference]: Without dead ends: 1862 [2021-10-13 19:26:52,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 4945.2ms TimeCoverageRelationStatistics Valid=434, Invalid=4678, Unknown=0, NotChecked=0, Total=5112 [2021-10-13 19:26:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-10-13 19:26:52,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1488. [2021-10-13 19:26:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1486 states have (on average 3.6049798115746974) internal successors, (5357), 1487 states have internal predecessors, (5357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 5357 transitions. [2021-10-13 19:26:52,434 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 5357 transitions. Word has length 20 [2021-10-13 19:26:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:26:52,434 INFO L470 AbstractCegarLoop]: Abstraction has 1488 states and 5357 transitions. [2021-10-13 19:26:52,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 5357 transitions. [2021-10-13 19:26:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:26:52,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:26:52,436 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:26:52,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-10-13 19:26:52,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-13 19:26:52,651 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:26:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:26:52,652 INFO L82 PathProgramCache]: Analyzing trace with hash 498174441, now seen corresponding path program 29 times [2021-10-13 19:26:52,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:26:52,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371199101] [2021-10-13 19:26:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:26:52,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:26:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:26:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:53,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:26:53,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371199101] [2021-10-13 19:26:53,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371199101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:53,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589588014] [2021-10-13 19:26:53,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:26:53,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:26:53,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:26:53,182 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:26:53,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-13 19:26:55,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:26:55,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:26:55,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 19:26:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:26:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:26:56,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589588014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:26:56,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:26:56,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2021-10-13 19:26:56,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361949726] [2021-10-13 19:26:56,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 19:26:56,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:26:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 19:26:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 19:26:56,817 INFO L87 Difference]: Start difference. First operand 1488 states and 5357 transitions. Second operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:26:59,614 INFO L93 Difference]: Finished difference Result 1730 states and 5782 transitions. [2021-10-13 19:26:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 19:26:59,614 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:26:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:26:59,622 INFO L225 Difference]: With dead ends: 1730 [2021-10-13 19:26:59,622 INFO L226 Difference]: Without dead ends: 1712 [2021-10-13 19:26:59,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 2835.5ms TimeCoverageRelationStatistics Valid=404, Invalid=3628, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 19:26:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-10-13 19:26:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1440. [2021-10-13 19:26:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1438 states have (on average 3.597357440890125) internal successors, (5173), 1439 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 5173 transitions. [2021-10-13 19:26:59,669 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 5173 transitions. Word has length 20 [2021-10-13 19:26:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:26:59,669 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 5173 transitions. [2021-10-13 19:26:59,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:26:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 5173 transitions. [2021-10-13 19:26:59,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:26:59,671 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:26:59,671 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:26:59,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-10-13 19:26:59,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-10-13 19:26:59,886 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:26:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:26:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash -895257343, now seen corresponding path program 30 times [2021-10-13 19:26:59,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:26:59,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386726559] [2021-10-13 19:26:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:26:59,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:27:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:27:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:27:02,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:27:02,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386726559] [2021-10-13 19:27:02,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386726559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:02,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224453046] [2021-10-13 19:27:02,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:27:02,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:27:02,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:27:02,369 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:27:02,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-10-13 19:27:05,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:27:05,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:27:05,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 19:27:05,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:27:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:27:06,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224453046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:06,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:27:06,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 30 [2021-10-13 19:27:06,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359355731] [2021-10-13 19:27:06,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:27:06,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:27:06,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:27:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:27:06,547 INFO L87 Difference]: Start difference. First operand 1440 states and 5173 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:27:09,599 INFO L93 Difference]: Finished difference Result 1718 states and 5909 transitions. [2021-10-13 19:27:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:27:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:27:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:27:09,607 INFO L225 Difference]: With dead ends: 1718 [2021-10-13 19:27:09,607 INFO L226 Difference]: Without dead ends: 1698 [2021-10-13 19:27:09,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 3408.2ms TimeCoverageRelationStatistics Valid=342, Invalid=2628, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 19:27:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-10-13 19:27:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1496. [2021-10-13 19:27:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1494 states have (on average 3.5809906291834004) internal successors, (5350), 1495 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5350 transitions. [2021-10-13 19:27:09,655 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5350 transitions. Word has length 20 [2021-10-13 19:27:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:27:09,656 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 5350 transitions. [2021-10-13 19:27:09,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5350 transitions. [2021-10-13 19:27:09,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:27:09,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:27:09,658 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:27:09,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-10-13 19:27:09,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:27:09,871 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:27:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:27:09,872 INFO L82 PathProgramCache]: Analyzing trace with hash -895142026, now seen corresponding path program 32 times [2021-10-13 19:27:09,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:27:09,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56179018] [2021-10-13 19:27:09,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:27:09,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:27:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:27:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:27:14,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:27:14,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56179018] [2021-10-13 19:27:14,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56179018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:14,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473952091] [2021-10-13 19:27:14,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:27:14,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:27:14,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:27:14,262 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:27:14,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-10-13 19:27:16,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:27:16,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:27:16,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 19:27:16,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:27:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:27:17,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473952091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:17,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:27:17,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-10-13 19:27:17,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260193486] [2021-10-13 19:27:17,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:27:17,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:27:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:27:17,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:27:17,725 INFO L87 Difference]: Start difference. First operand 1496 states and 5350 transitions. Second operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:27:20,910 INFO L93 Difference]: Finished difference Result 1580 states and 5532 transitions. [2021-10-13 19:27:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:27:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:27:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:27:20,914 INFO L225 Difference]: With dead ends: 1580 [2021-10-13 19:27:20,915 INFO L226 Difference]: Without dead ends: 1566 [2021-10-13 19:27:20,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3567.3ms TimeCoverageRelationStatistics Valid=310, Invalid=2660, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 19:27:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-10-13 19:27:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1508. [2021-10-13 19:27:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1506 states have (on average 3.5750332005312084) internal successors, (5384), 1507 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5384 transitions. [2021-10-13 19:27:20,966 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5384 transitions. Word has length 20 [2021-10-13 19:27:20,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:27:20,966 INFO L470 AbstractCegarLoop]: Abstraction has 1508 states and 5384 transitions. [2021-10-13 19:27:20,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:20,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5384 transitions. [2021-10-13 19:27:20,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:27:20,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:27:20,968 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:27:21,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-10-13 19:27:21,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:27:21,174 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:27:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:27:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash -895138306, now seen corresponding path program 33 times [2021-10-13 19:27:21,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:27:21,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529513095] [2021-10-13 19:27:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:27:21,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:27:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:27:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:27:23,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:27:23,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529513095] [2021-10-13 19:27:23,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529513095] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:23,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018070272] [2021-10-13 19:27:23,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:27:23,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:27:23,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:27:23,702 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:27:23,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-10-13 19:27:26,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:27:26,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:27:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 19:27:26,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:27:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 19:27:26,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018070272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:26,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:27:26,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 25 [2021-10-13 19:27:26,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118943505] [2021-10-13 19:27:26,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 19:27:26,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:27:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 19:27:26,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-10-13 19:27:26,988 INFO L87 Difference]: Start difference. First operand 1508 states and 5384 transitions. Second operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:27:29,024 INFO L93 Difference]: Finished difference Result 1594 states and 5585 transitions. [2021-10-13 19:27:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 19:27:29,025 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:27:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:27:29,028 INFO L225 Difference]: With dead ends: 1594 [2021-10-13 19:27:29,028 INFO L226 Difference]: Without dead ends: 1594 [2021-10-13 19:27:29,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 2416.6ms TimeCoverageRelationStatistics Valid=184, Invalid=1708, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 19:27:29,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-10-13 19:27:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1506. [2021-10-13 19:27:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1504 states have (on average 3.575132978723404) internal successors, (5377), 1505 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5377 transitions. [2021-10-13 19:27:29,058 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5377 transitions. Word has length 20 [2021-10-13 19:27:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:27:29,059 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 5377 transitions. [2021-10-13 19:27:29,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5377 transitions. [2021-10-13 19:27:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:27:29,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:27:29,060 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:27:29,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-10-13 19:27:29,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:27:29,261 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:27:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:27:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash -780744707, now seen corresponding path program 31 times [2021-10-13 19:27:29,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:27:29,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969450830] [2021-10-13 19:27:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:27:29,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:27:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:27:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:27:30,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:27:30,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969450830] [2021-10-13 19:27:30,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969450830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:30,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362445918] [2021-10-13 19:27:30,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:27:30,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:27:30,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:27:30,664 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:27:30,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-10-13 19:27:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:27:33,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 19:27:33,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:27:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:27:34,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362445918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:34,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:27:34,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-10-13 19:27:34,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769043495] [2021-10-13 19:27:34,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:27:34,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:27:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:27:34,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:27:34,023 INFO L87 Difference]: Start difference. First operand 1506 states and 5377 transitions. Second operand has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:27:36,061 INFO L93 Difference]: Finished difference Result 1588 states and 5570 transitions. [2021-10-13 19:27:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 19:27:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:27:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:27:36,068 INFO L225 Difference]: With dead ends: 1588 [2021-10-13 19:27:36,069 INFO L226 Difference]: Without dead ends: 1588 [2021-10-13 19:27:36,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 2424.2ms TimeCoverageRelationStatistics Valid=262, Invalid=2494, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 19:27:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-10-13 19:27:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1506. [2021-10-13 19:27:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1504 states have (on average 3.575132978723404) internal successors, (5377), 1505 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5377 transitions. [2021-10-13 19:27:36,105 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5377 transitions. Word has length 20 [2021-10-13 19:27:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:27:36,105 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 5377 transitions. [2021-10-13 19:27:36,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:27:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5377 transitions. [2021-10-13 19:27:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:27:36,107 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:27:36,107 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:27:36,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-10-13 19:27:36,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:27:36,316 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:27:36,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:27:36,316 INFO L82 PathProgramCache]: Analyzing trace with hash -780740866, now seen corresponding path program 34 times [2021-10-13 19:27:36,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:27:36,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099480084] [2021-10-13 19:27:36,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:27:36,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:27:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:27:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:27:53,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:27:53,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099480084] [2021-10-13 19:27:53,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099480084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:53,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115529581] [2021-10-13 19:27:53,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:27:53,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:27:53,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:27:53,351 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:27:53,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-10-13 19:27:55,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:27:55,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:27:55,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 19:27:55,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:27:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:27:57,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115529581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:27:57,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:27:57,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 31 [2021-10-13 19:27:57,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728356682] [2021-10-13 19:27:57,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 19:27:57,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:27:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 19:27:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 19:27:57,137 INFO L87 Difference]: Start difference. First operand 1506 states and 5377 transitions. Second operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:28:00,515 INFO L93 Difference]: Finished difference Result 1730 states and 5911 transitions. [2021-10-13 19:28:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 19:28:00,515 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:28:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:28:00,519 INFO L225 Difference]: With dead ends: 1730 [2021-10-13 19:28:00,519 INFO L226 Difference]: Without dead ends: 1730 [2021-10-13 19:28:00,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 4178.7ms TimeCoverageRelationStatistics Valid=245, Invalid=2835, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 19:28:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-10-13 19:28:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1552. [2021-10-13 19:28:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1550 states have (on average 3.554838709677419) internal successors, (5510), 1551 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5510 transitions. [2021-10-13 19:28:00,554 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5510 transitions. Word has length 20 [2021-10-13 19:28:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:28:00,554 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5510 transitions. [2021-10-13 19:28:00,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5510 transitions. [2021-10-13 19:28:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:28:00,555 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:28:00,555 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:28:00,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-10-13 19:28:00,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:28:00,756 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:28:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:28:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash -780740863, now seen corresponding path program 32 times [2021-10-13 19:28:00,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:28:00,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21045854] [2021-10-13 19:28:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:28:00,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:28:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:28:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:28:02,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:28:02,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21045854] [2021-10-13 19:28:02,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21045854] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:02,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83657265] [2021-10-13 19:28:02,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:28:02,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:28:02,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:28:02,074 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:28:02,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-10-13 19:28:04,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:28:04,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:28:04,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 19:28:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:28:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:28:05,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83657265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:05,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:28:05,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 30 [2021-10-13 19:28:05,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641173238] [2021-10-13 19:28:05,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:28:05,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:28:05,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:28:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:28:05,783 INFO L87 Difference]: Start difference. First operand 1552 states and 5510 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:28:08,149 INFO L93 Difference]: Finished difference Result 1656 states and 5726 transitions. [2021-10-13 19:28:08,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 19:28:08,150 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:28:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:28:08,154 INFO L225 Difference]: With dead ends: 1656 [2021-10-13 19:28:08,154 INFO L226 Difference]: Without dead ends: 1640 [2021-10-13 19:28:08,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2762.8ms TimeCoverageRelationStatistics Valid=239, Invalid=2517, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 19:28:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-10-13 19:28:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1544. [2021-10-13 19:28:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1542 states have (on average 3.5408560311284045) internal successors, (5460), 1543 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5460 transitions. [2021-10-13 19:28:08,186 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5460 transitions. Word has length 20 [2021-10-13 19:28:08,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:28:08,187 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5460 transitions. [2021-10-13 19:28:08,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5460 transitions. [2021-10-13 19:28:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:28:08,189 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:28:08,189 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:28:08,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-10-13 19:28:08,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-10-13 19:28:08,405 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:28:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:28:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1643788682, now seen corresponding path program 35 times [2021-10-13 19:28:08,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:28:08,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652370277] [2021-10-13 19:28:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:28:08,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:28:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:28:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:28:11,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:28:11,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652370277] [2021-10-13 19:28:11,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652370277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:11,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386859633] [2021-10-13 19:28:11,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:28:11,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:28:11,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:28:11,648 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:28:11,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-10-13 19:28:14,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:28:14,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:28:14,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 19:28:14,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:28:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:28:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386859633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:15,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:28:15,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 30 [2021-10-13 19:28:15,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73604920] [2021-10-13 19:28:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:28:15,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:28:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:28:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:28:15,460 INFO L87 Difference]: Start difference. First operand 1544 states and 5460 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:28:17,336 INFO L93 Difference]: Finished difference Result 1806 states and 6209 transitions. [2021-10-13 19:28:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:28:17,336 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:28:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:28:17,340 INFO L225 Difference]: With dead ends: 1806 [2021-10-13 19:28:17,340 INFO L226 Difference]: Without dead ends: 1806 [2021-10-13 19:28:17,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2472.9ms TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 19:28:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-10-13 19:28:17,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1554. [2021-10-13 19:28:17,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1552 states have (on average 3.5431701030927836) internal successors, (5499), 1553 states have internal predecessors, (5499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 5499 transitions. [2021-10-13 19:28:17,385 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 5499 transitions. Word has length 20 [2021-10-13 19:28:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:28:17,386 INFO L470 AbstractCegarLoop]: Abstraction has 1554 states and 5499 transitions. [2021-10-13 19:28:17,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 5499 transitions. [2021-10-13 19:28:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:28:17,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:28:17,388 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:28:17,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-10-13 19:28:17,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-10-13 19:28:17,603 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:28:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:28:17,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1643788679, now seen corresponding path program 33 times [2021-10-13 19:28:17,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:28:17,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157216661] [2021-10-13 19:28:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:28:17,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:28:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:28:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:28:18,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:28:18,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157216661] [2021-10-13 19:28:18,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157216661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:18,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077759797] [2021-10-13 19:28:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:28:18,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:28:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:28:18,488 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:28:18,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-10-13 19:28:21,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 19:28:21,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:28:21,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-13 19:28:21,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:28:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:28:22,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077759797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:22,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:28:22,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 31 [2021-10-13 19:28:22,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9860020] [2021-10-13 19:28:22,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 19:28:22,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:28:22,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 19:28:22,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 19:28:22,404 INFO L87 Difference]: Start difference. First operand 1554 states and 5499 transitions. Second operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:28:23,584 INFO L93 Difference]: Finished difference Result 1678 states and 5807 transitions. [2021-10-13 19:28:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 19:28:23,585 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:28:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:28:23,588 INFO L225 Difference]: With dead ends: 1678 [2021-10-13 19:28:23,588 INFO L226 Difference]: Without dead ends: 1672 [2021-10-13 19:28:23,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1578.4ms TimeCoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 19:28:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-10-13 19:28:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1536. [2021-10-13 19:28:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1534 states have (on average 3.546284224250326) internal successors, (5440), 1535 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5440 transitions. [2021-10-13 19:28:23,626 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5440 transitions. Word has length 20 [2021-10-13 19:28:23,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:28:23,627 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 5440 transitions. [2021-10-13 19:28:23,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5440 transitions. [2021-10-13 19:28:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 19:28:23,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:28:23,629 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:28:23,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-10-13 19:28:23,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:28:23,843 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:28:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:28:23,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1640213762, now seen corresponding path program 36 times [2021-10-13 19:28:23,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:28:23,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385108270] [2021-10-13 19:28:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:28:23,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:28:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:28:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:28:34,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:28:34,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385108270] [2021-10-13 19:28:34,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385108270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:34,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349765717] [2021-10-13 19:28:34,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:28:34,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:28:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:28:34,572 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:28:34,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-10-13 19:28:37,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:28:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:28:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 19:28:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:28:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-13 19:28:38,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349765717] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:38,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:28:38,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 29 [2021-10-13 19:28:38,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74146114] [2021-10-13 19:28:38,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 19:28:38,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:28:38,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 19:28:38,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:28:38,731 INFO L87 Difference]: Start difference. First operand 1536 states and 5440 transitions. Second operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:28:44,873 INFO L93 Difference]: Finished difference Result 1640 states and 5682 transitions. [2021-10-13 19:28:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 19:28:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 [2021-10-13 19:28:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:28:44,877 INFO L225 Difference]: With dead ends: 1640 [2021-10-13 19:28:44,877 INFO L226 Difference]: Without dead ends: 1630 [2021-10-13 19:28:44,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 7775.8ms TimeCoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 19:28:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-10-13 19:28:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1534. [2021-10-13 19:28:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1532 states have (on average 3.5463446475195823) internal successors, (5433), 1533 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5433 transitions. [2021-10-13 19:28:44,918 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5433 transitions. Word has length 20 [2021-10-13 19:28:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:28:44,918 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 5433 transitions. [2021-10-13 19:28:44,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5433 transitions. [2021-10-13 19:28:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:28:44,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:28:44,920 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:28:44,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-10-13 19:28:45,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-10-13 19:28:45,131 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:28:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:28:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1087686293, now seen corresponding path program 34 times [2021-10-13 19:28:45,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:28:45,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809800363] [2021-10-13 19:28:45,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:28:45,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:28:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:28:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:28:46,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:28:46,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809800363] [2021-10-13 19:28:46,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809800363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:46,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771621391] [2021-10-13 19:28:46,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:28:46,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:28:46,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:28:46,283 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:28:46,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-10-13 19:28:49,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:28:49,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:28:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-13 19:28:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:28:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:28:50,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771621391] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:28:50,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:28:50,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-13 19:28:50,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005205965] [2021-10-13 19:28:50,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 19:28:50,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:28:50,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 19:28:50,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 19:28:50,541 INFO L87 Difference]: Start difference. First operand 1534 states and 5433 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:58,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:28:58,998 INFO L93 Difference]: Finished difference Result 3828 states and 13433 transitions. [2021-10-13 19:28:58,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-13 19:28:58,999 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:28:58,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:28:59,011 INFO L225 Difference]: With dead ends: 3828 [2021-10-13 19:28:59,011 INFO L226 Difference]: Without dead ends: 3828 [2021-10-13 19:28:59,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 7768.3ms TimeCoverageRelationStatistics Valid=733, Invalid=6923, Unknown=0, NotChecked=0, Total=7656 [2021-10-13 19:28:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3828 states. [2021-10-13 19:28:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3828 to 3038. [2021-10-13 19:28:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3036 states have (on average 3.7816205533596836) internal successors, (11481), 3037 states have internal predecessors, (11481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 11481 transitions. [2021-10-13 19:28:59,184 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 11481 transitions. Word has length 21 [2021-10-13 19:28:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:28:59,185 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 11481 transitions. [2021-10-13 19:28:59,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:28:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 11481 transitions. [2021-10-13 19:28:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:28:59,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:28:59,188 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:28:59,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-10-13 19:28:59,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-10-13 19:28:59,403 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:28:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:28:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1198508813, now seen corresponding path program 35 times [2021-10-13 19:28:59,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:28:59,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393135812] [2021-10-13 19:28:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:28:59,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:28:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:29:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:29:01,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:29:01,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393135812] [2021-10-13 19:29:01,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393135812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:01,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807361016] [2021-10-13 19:29:01,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:29:01,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:29:01,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:29:01,195 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:29:01,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-13 19:29:03,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:29:03,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:29:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 19:29:03,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:29:03,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 142 [2021-10-13 19:29:04,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 19:29:04,477 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:29:04,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 19:29:04,594 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:29:04,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 19:29:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:29:06,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807361016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:06,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:29:06,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 36 [2021-10-13 19:29:06,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794333607] [2021-10-13 19:29:06,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 19:29:06,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:29:06,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 19:29:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 19:29:06,188 INFO L87 Difference]: Start difference. First operand 3038 states and 11481 transitions. Second operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:16,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:29:16,658 INFO L93 Difference]: Finished difference Result 4578 states and 16368 transitions. [2021-10-13 19:29:16,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-13 19:29:16,659 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:29:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:29:16,670 INFO L225 Difference]: With dead ends: 4578 [2021-10-13 19:29:16,670 INFO L226 Difference]: Without dead ends: 4578 [2021-10-13 19:29:16,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 9888.8ms TimeCoverageRelationStatistics Valid=692, Invalid=7680, Unknown=0, NotChecked=0, Total=8372 [2021-10-13 19:29:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4578 states. [2021-10-13 19:29:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4578 to 3554. [2021-10-13 19:29:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3552 states have (on average 3.8240427927927927) internal successors, (13583), 3553 states have internal predecessors, (13583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 13583 transitions. [2021-10-13 19:29:16,762 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 13583 transitions. Word has length 21 [2021-10-13 19:29:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:29:16,762 INFO L470 AbstractCegarLoop]: Abstraction has 3554 states and 13583 transitions. [2021-10-13 19:29:16,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 13583 transitions. [2021-10-13 19:29:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:29:16,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:29:16,764 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:29:16,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-10-13 19:29:16,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:29:16,965 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:29:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:29:16,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1202199053, now seen corresponding path program 36 times [2021-10-13 19:29:16,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:29:16,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989710395] [2021-10-13 19:29:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:29:16,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:29:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:29:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:29:17,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:29:17,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989710395] [2021-10-13 19:29:17,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989710395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:17,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966260174] [2021-10-13 19:29:17,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:29:17,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:29:17,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:29:17,794 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:29:17,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-13 19:29:21,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:29:21,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:29:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 19:29:21,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:29:21,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:29:21,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:29:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:29:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:29:23,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966260174] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:23,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:29:23,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 30 [2021-10-13 19:29:23,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982988619] [2021-10-13 19:29:23,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:29:23,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:29:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:29:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:29:23,135 INFO L87 Difference]: Start difference. First operand 3554 states and 13583 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:29:30,942 INFO L93 Difference]: Finished difference Result 4783 states and 15314 transitions. [2021-10-13 19:29:30,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:29:30,943 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:29:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:29:30,953 INFO L225 Difference]: With dead ends: 4783 [2021-10-13 19:29:30,953 INFO L226 Difference]: Without dead ends: 4365 [2021-10-13 19:29:30,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 8078.7ms TimeCoverageRelationStatistics Valid=576, Invalid=2729, Unknown=1, NotChecked=0, Total=3306 [2021-10-13 19:29:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-10-13 19:29:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 1640. [2021-10-13 19:29:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1638 states have (on average 2.9194139194139193) internal successors, (4782), 1639 states have internal predecessors, (4782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 4782 transitions. [2021-10-13 19:29:31,098 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 4782 transitions. Word has length 21 [2021-10-13 19:29:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:29:31,098 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 4782 transitions. [2021-10-13 19:29:31,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 4782 transitions. [2021-10-13 19:29:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:29:31,100 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:29:31,100 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:29:31,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-10-13 19:29:31,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:29:31,301 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:29:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:29:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1202202773, now seen corresponding path program 37 times [2021-10-13 19:29:31,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:29:31,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090319829] [2021-10-13 19:29:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:29:31,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:29:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:29:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:29:33,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:29:33,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090319829] [2021-10-13 19:29:33,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090319829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:33,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054193250] [2021-10-13 19:29:33,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:29:33,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:29:33,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:29:33,182 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:29:33,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-13 19:29:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:29:36,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 19:29:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:29:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:29:36,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-13 19:29:36,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-10-13 19:29:36,479 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:29:36,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 19:29:36,581 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:29:36,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-10-13 19:29:36,688 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-13 19:29:36,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-13 19:29:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:29:38,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054193250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:38,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:29:38,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-13 19:29:38,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101672158] [2021-10-13 19:29:38,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 19:29:38,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:29:38,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 19:29:38,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 19:29:38,320 INFO L87 Difference]: Start difference. First operand 1640 states and 4782 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:29:42,845 INFO L93 Difference]: Finished difference Result 2162 states and 6193 transitions. [2021-10-13 19:29:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:29:42,846 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:29:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:29:42,849 INFO L225 Difference]: With dead ends: 2162 [2021-10-13 19:29:42,850 INFO L226 Difference]: Without dead ends: 2160 [2021-10-13 19:29:42,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 5106.9ms TimeCoverageRelationStatistics Valid=323, Invalid=3459, Unknown=0, NotChecked=0, Total=3782 [2021-10-13 19:29:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-10-13 19:29:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1634. [2021-10-13 19:29:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1632 states have (on average 2.917279411764706) internal successors, (4761), 1633 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4761 transitions. [2021-10-13 19:29:42,888 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4761 transitions. Word has length 21 [2021-10-13 19:29:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:29:42,888 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 4761 transitions. [2021-10-13 19:29:42,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4761 transitions. [2021-10-13 19:29:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:29:42,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:29:42,890 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:29:42,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-10-13 19:29:43,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:29:43,091 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:29:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:29:43,091 INFO L82 PathProgramCache]: Analyzing trace with hash 338920470, now seen corresponding path program 37 times [2021-10-13 19:29:43,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:29:43,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526790353] [2021-10-13 19:29:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:29:43,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:29:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:29:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:29:43,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:29:43,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526790353] [2021-10-13 19:29:43,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526790353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:43,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333281441] [2021-10-13 19:29:43,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:29:43,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:29:43,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:29:43,259 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:29:43,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-13 19:29:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:29:46,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 19:29:46,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:29:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:29:46,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333281441] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:46,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:29:46,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-13 19:29:46,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773554869] [2021-10-13 19:29:46,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 19:29:46,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:29:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 19:29:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:29:46,821 INFO L87 Difference]: Start difference. First operand 1634 states and 4761 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:29:47,220 INFO L93 Difference]: Finished difference Result 690 states and 1663 transitions. [2021-10-13 19:29:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 19:29:47,221 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:29:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:29:47,223 INFO L225 Difference]: With dead ends: 690 [2021-10-13 19:29:47,223 INFO L226 Difference]: Without dead ends: 590 [2021-10-13 19:29:47,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 572.1ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 19:29:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-10-13 19:29:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 506. [2021-10-13 19:29:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 504 states have (on average 2.5218253968253967) internal successors, (1271), 505 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:47,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1271 transitions. [2021-10-13 19:29:47,237 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1271 transitions. Word has length 21 [2021-10-13 19:29:47,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:29:47,237 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1271 transitions. [2021-10-13 19:29:47,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:29:47,237 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1271 transitions. [2021-10-13 19:29:47,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:29:47,238 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:29:47,239 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:29:47,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-10-13 19:29:47,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:29:47,453 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:29:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:29:47,454 INFO L82 PathProgramCache]: Analyzing trace with hash 339039634, now seen corresponding path program 38 times [2021-10-13 19:29:47,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:29:47,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528983282] [2021-10-13 19:29:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:29:47,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:29:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:29:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:29:48,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:29:48,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528983282] [2021-10-13 19:29:48,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528983282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:48,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100855840] [2021-10-13 19:29:48,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:29:48,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:29:48,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:29:48,154 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:29:48,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-13 19:29:51,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:29:51,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:29:51,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-13 19:29:51,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:29:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:29:51,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-10-13 19:29:51,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:29:51,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:29:51,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:29:51,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:29:51,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:29:51,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:29:51,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:29:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:29:54,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100855840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:29:54,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:29:54,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-13 19:29:54,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7771508] [2021-10-13 19:29:54,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 19:29:54,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:29:54,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 19:29:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 19:29:54,144 INFO L87 Difference]: Start difference. First operand 506 states and 1271 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:30:02,467 INFO L93 Difference]: Finished difference Result 556 states and 1374 transitions. [2021-10-13 19:30:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 19:30:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:30:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:30:02,469 INFO L225 Difference]: With dead ends: 556 [2021-10-13 19:30:02,469 INFO L226 Difference]: Without dead ends: 552 [2021-10-13 19:30:02,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 7966.1ms TimeCoverageRelationStatistics Valid=325, Invalid=3456, Unknown=1, NotChecked=0, Total=3782 [2021-10-13 19:30:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-10-13 19:30:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 516. [2021-10-13 19:30:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 514 states have (on average 2.5136186770428015) internal successors, (1292), 515 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1292 transitions. [2021-10-13 19:30:02,477 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1292 transitions. Word has length 21 [2021-10-13 19:30:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:30:02,478 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1292 transitions. [2021-10-13 19:30:02,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1292 transitions. [2021-10-13 19:30:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:30:02,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:30:02,479 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:30:02,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-10-13 19:30:02,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-10-13 19:30:02,680 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:30:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:30:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash 339039637, now seen corresponding path program 38 times [2021-10-13 19:30:02,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:30:02,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65186737] [2021-10-13 19:30:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:30:02,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:30:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:30:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:30:03,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:30:03,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65186737] [2021-10-13 19:30:03,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65186737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:30:03,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269200858] [2021-10-13 19:30:03,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:30:03,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:30:03,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:30:03,423 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:30:03,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-13 19:30:06,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:30:06,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:30:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-13 19:30:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:30:06,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:30:06,930 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:30:06,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-13 19:30:07,028 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:30:07,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-10-13 19:30:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:30:08,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269200858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:30:08,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:30:08,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-13 19:30:08,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929724379] [2021-10-13 19:30:08,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 19:30:08,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:30:08,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 19:30:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 19:30:08,413 INFO L87 Difference]: Start difference. First operand 516 states and 1292 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:30:11,949 INFO L93 Difference]: Finished difference Result 600 states and 1452 transitions. [2021-10-13 19:30:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 19:30:11,950 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:30:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:30:11,951 INFO L225 Difference]: With dead ends: 600 [2021-10-13 19:30:11,951 INFO L226 Difference]: Without dead ends: 584 [2021-10-13 19:30:11,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 3836.1ms TimeCoverageRelationStatistics Valid=433, Invalid=3727, Unknown=0, NotChecked=0, Total=4160 [2021-10-13 19:30:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-10-13 19:30:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 506. [2021-10-13 19:30:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 504 states have (on average 2.517857142857143) internal successors, (1269), 505 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1269 transitions. [2021-10-13 19:30:11,960 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1269 transitions. Word has length 21 [2021-10-13 19:30:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:30:11,961 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1269 transitions. [2021-10-13 19:30:11,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1269 transitions. [2021-10-13 19:30:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:30:11,962 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:30:11,962 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:30:11,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-10-13 19:30:12,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:30:12,163 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:30:12,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:30:12,164 INFO L82 PathProgramCache]: Analyzing trace with hash 342614554, now seen corresponding path program 39 times [2021-10-13 19:30:12,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:30:12,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536410319] [2021-10-13 19:30:12,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:30:12,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:30:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:30:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:30:13,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:30:13,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536410319] [2021-10-13 19:30:13,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536410319] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:30:13,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192942539] [2021-10-13 19:30:13,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:30:13,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:30:13,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:30:13,620 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:30:13,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-13 19:30:16,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:30:16,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:30:16,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 19:30:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:30:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 19:30:17,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192942539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:30:17,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:30:17,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 28 [2021-10-13 19:30:17,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598276580] [2021-10-13 19:30:17,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 19:30:17,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:30:17,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 19:30:17,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-10-13 19:30:17,928 INFO L87 Difference]: Start difference. First operand 506 states and 1269 transitions. Second operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:23,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:30:23,188 INFO L93 Difference]: Finished difference Result 718 states and 1737 transitions. [2021-10-13 19:30:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 19:30:23,188 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:30:23,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:30:23,190 INFO L225 Difference]: With dead ends: 718 [2021-10-13 19:30:23,190 INFO L226 Difference]: Without dead ends: 700 [2021-10-13 19:30:23,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 4786.2ms TimeCoverageRelationStatistics Valid=403, Invalid=4153, Unknown=0, NotChecked=0, Total=4556 [2021-10-13 19:30:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-10-13 19:30:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 560. [2021-10-13 19:30:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 558 states have (on average 2.6129032258064515) internal successors, (1458), 559 states have internal predecessors, (1458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1458 transitions. [2021-10-13 19:30:23,201 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1458 transitions. Word has length 21 [2021-10-13 19:30:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:30:23,255 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 1458 transitions. [2021-10-13 19:30:23,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1458 transitions. [2021-10-13 19:30:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:30:23,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:30:23,256 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:30:23,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-10-13 19:30:23,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-10-13 19:30:23,457 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:30:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:30:23,460 INFO L82 PathProgramCache]: Analyzing trace with hash 342729874, now seen corresponding path program 40 times [2021-10-13 19:30:23,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:30:23,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876737739] [2021-10-13 19:30:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:30:23,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:30:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:30:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:30:24,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:30:24,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876737739] [2021-10-13 19:30:24,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876737739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:30:24,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223516558] [2021-10-13 19:30:24,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:30:24,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:30:24,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:30:24,931 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:30:24,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-13 19:30:27,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:30:27,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:30:27,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 19:30:27,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:30:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:30:31,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223516558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:30:31,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:30:31,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-13 19:30:31,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673783401] [2021-10-13 19:30:31,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 19:30:31,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:30:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 19:30:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 19:30:31,118 INFO L87 Difference]: Start difference. First operand 560 states and 1458 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:46,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:30:46,375 INFO L93 Difference]: Finished difference Result 688 states and 1677 transitions. [2021-10-13 19:30:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-13 19:30:46,376 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:30:46,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:30:46,377 INFO L225 Difference]: With dead ends: 688 [2021-10-13 19:30:46,377 INFO L226 Difference]: Without dead ends: 680 [2021-10-13 19:30:46,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 16756.0ms TimeCoverageRelationStatistics Valid=723, Invalid=5283, Unknown=0, NotChecked=0, Total=6006 [2021-10-13 19:30:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-10-13 19:30:46,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 558. [2021-10-13 19:30:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 556 states have (on average 2.6133093525179856) internal successors, (1453), 557 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1453 transitions. [2021-10-13 19:30:46,387 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1453 transitions. Word has length 21 [2021-10-13 19:30:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:30:46,387 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1453 transitions. [2021-10-13 19:30:46,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1453 transitions. [2021-10-13 19:30:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:30:46,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:30:46,388 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:30:46,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-10-13 19:30:46,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-10-13 19:30:46,589 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:30:46,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:30:46,590 INFO L82 PathProgramCache]: Analyzing trace with hash 342733597, now seen corresponding path program 39 times [2021-10-13 19:30:46,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:30:46,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218997843] [2021-10-13 19:30:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:30:46,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:30:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:30:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:30:47,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:30:47,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218997843] [2021-10-13 19:30:47,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218997843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:30:47,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944696413] [2021-10-13 19:30:47,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:30:47,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:30:47,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:30:47,483 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:30:47,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-13 19:30:50,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:30:50,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:30:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 19:30:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:30:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 19:30:51,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944696413] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:30:51,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:30:51,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 26 [2021-10-13 19:30:51,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103910291] [2021-10-13 19:30:51,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 19:30:51,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:30:51,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 19:30:51,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-10-13 19:30:51,859 INFO L87 Difference]: Start difference. First operand 558 states and 1453 transitions. Second operand has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:56,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:30:56,042 INFO L93 Difference]: Finished difference Result 978 states and 2395 transitions. [2021-10-13 19:30:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-13 19:30:56,043 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:30:56,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:30:56,045 INFO L225 Difference]: With dead ends: 978 [2021-10-13 19:30:56,045 INFO L226 Difference]: Without dead ends: 924 [2021-10-13 19:30:56,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 3792.6ms TimeCoverageRelationStatistics Valid=539, Invalid=4153, Unknown=0, NotChecked=0, Total=4692 [2021-10-13 19:30:56,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-10-13 19:30:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 596. [2021-10-13 19:30:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 594 states have (on average 2.6936026936026938) internal successors, (1600), 595 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1600 transitions. [2021-10-13 19:30:56,057 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1600 transitions. Word has length 21 [2021-10-13 19:30:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:30:56,057 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1600 transitions. [2021-10-13 19:30:56,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:30:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1600 transitions. [2021-10-13 19:30:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:30:56,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:30:56,058 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:30:56,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-10-13 19:30:56,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:30:56,259 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:30:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:30:56,260 INFO L82 PathProgramCache]: Analyzing trace with hash 453556114, now seen corresponding path program 41 times [2021-10-13 19:30:56,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:30:56,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245061223] [2021-10-13 19:30:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:30:56,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:30:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:30:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:30:56,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:30:56,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245061223] [2021-10-13 19:30:56,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245061223] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:30:56,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351576933] [2021-10-13 19:30:56,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:30:56,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:30:56,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:30:56,939 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:30:56,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-13 19:31:00,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:31:00,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:31:00,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-13 19:31:00,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:31:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:31:00,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2021-10-13 19:31:00,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-13 19:31:00,460 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:31:00,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-13 19:31:00,560 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 19:31:00,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 19:31:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:31:02,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351576933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:02,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:31:02,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 33 [2021-10-13 19:31:02,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681165342] [2021-10-13 19:31:02,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 19:31:02,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:31:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 19:31:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:31:02,219 INFO L87 Difference]: Start difference. First operand 596 states and 1600 transitions. Second operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:31:05,462 INFO L93 Difference]: Finished difference Result 664 states and 1714 transitions. [2021-10-13 19:31:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 19:31:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:31:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:31:05,464 INFO L225 Difference]: With dead ends: 664 [2021-10-13 19:31:05,464 INFO L226 Difference]: Without dead ends: 644 [2021-10-13 19:31:05,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 3527.9ms TimeCoverageRelationStatistics Valid=392, Invalid=3148, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 19:31:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-10-13 19:31:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 588. [2021-10-13 19:31:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 586 states have (on average 2.7030716723549486) internal successors, (1584), 587 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1584 transitions. [2021-10-13 19:31:05,474 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1584 transitions. Word has length 21 [2021-10-13 19:31:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:31:05,474 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1584 transitions. [2021-10-13 19:31:05,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1584 transitions. [2021-10-13 19:31:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:31:05,475 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:31:05,475 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:31:05,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-10-13 19:31:05,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:05,676 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:31:05,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:31:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash -534701043, now seen corresponding path program 40 times [2021-10-13 19:31:05,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:31:05,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155782921] [2021-10-13 19:31:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:31:05,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:31:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:31:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:31:07,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:31:07,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155782921] [2021-10-13 19:31:07,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155782921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:07,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560899341] [2021-10-13 19:31:07,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:31:07,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:07,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:31:07,228 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:31:07,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-10-13 19:31:10,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:31:10,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:31:10,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 19:31:10,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:31:10,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2021-10-13 19:31:10,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 19:31:10,984 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:31:10,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 19:31:11,093 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 19:31:11,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-13 19:31:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:31:12,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560899341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:12,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:31:12,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-13 19:31:12,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915565750] [2021-10-13 19:31:12,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 19:31:12,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:31:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 19:31:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 19:31:12,965 INFO L87 Difference]: Start difference. First operand 588 states and 1584 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:31:27,946 INFO L93 Difference]: Finished difference Result 681 states and 1752 transitions. [2021-10-13 19:31:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 19:31:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:31:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:31:27,948 INFO L225 Difference]: With dead ends: 681 [2021-10-13 19:31:27,948 INFO L226 Difference]: Without dead ends: 681 [2021-10-13 19:31:27,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 14100.4ms TimeCoverageRelationStatistics Valid=578, Invalid=4971, Unknown=1, NotChecked=0, Total=5550 [2021-10-13 19:31:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-10-13 19:31:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 578. [2021-10-13 19:31:27,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 576 states have (on average 2.7065972222222223) internal successors, (1559), 577 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1559 transitions. [2021-10-13 19:31:27,957 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1559 transitions. Word has length 21 [2021-10-13 19:31:27,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:31:27,957 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1559 transitions. [2021-10-13 19:31:27,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1559 transitions. [2021-10-13 19:31:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:31:27,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:31:27,958 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:31:27,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-10-13 19:31:28,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:28,159 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:31:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:31:28,160 INFO L82 PathProgramCache]: Analyzing trace with hash -531126126, now seen corresponding path program 42 times [2021-10-13 19:31:28,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:31:28,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804386595] [2021-10-13 19:31:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:31:28,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:31:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:31:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:31:28,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:31:28,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804386595] [2021-10-13 19:31:28,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804386595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:28,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968215750] [2021-10-13 19:31:28,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:31:28,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:28,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:31:28,741 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:31:28,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-10-13 19:31:32,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:31:32,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:31:32,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-13 19:31:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:31:32,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:31:32,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-13 19:31:32,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:31:32,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:31:32,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:31:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:31:33,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968215750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:33,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:31:33,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 33 [2021-10-13 19:31:33,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504128019] [2021-10-13 19:31:33,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 19:31:33,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:31:33,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 19:31:33,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:31:33,879 INFO L87 Difference]: Start difference. First operand 578 states and 1559 transitions. Second operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:31:38,822 INFO L93 Difference]: Finished difference Result 671 states and 1705 transitions. [2021-10-13 19:31:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 19:31:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:31:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:31:38,824 INFO L225 Difference]: With dead ends: 671 [2021-10-13 19:31:38,824 INFO L226 Difference]: Without dead ends: 625 [2021-10-13 19:31:38,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 4931.5ms TimeCoverageRelationStatistics Valid=617, Invalid=4075, Unknown=0, NotChecked=0, Total=4692 [2021-10-13 19:31:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-10-13 19:31:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 554. [2021-10-13 19:31:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 552 states have (on average 2.7083333333333335) internal successors, (1495), 553 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1495 transitions. [2021-10-13 19:31:38,832 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1495 transitions. Word has length 21 [2021-10-13 19:31:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:31:38,832 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1495 transitions. [2021-10-13 19:31:38,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1495 transitions. [2021-10-13 19:31:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:31:38,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:31:38,833 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:31:38,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-10-13 19:31:39,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:39,034 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:31:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:31:39,035 INFO L82 PathProgramCache]: Analyzing trace with hash -531126123, now seen corresponding path program 41 times [2021-10-13 19:31:39,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:31:39,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913627203] [2021-10-13 19:31:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:31:39,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:31:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:31:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:31:40,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:31:40,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913627203] [2021-10-13 19:31:40,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913627203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:40,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954154917] [2021-10-13 19:31:40,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:31:40,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:40,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:31:40,303 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:31:40,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-10-13 19:31:43,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:31:43,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:31:43,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 19:31:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:31:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:31:45,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954154917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:45,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:31:45,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-13 19:31:45,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504306961] [2021-10-13 19:31:45,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 19:31:45,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:31:45,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 19:31:45,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 19:31:45,039 INFO L87 Difference]: Start difference. First operand 554 states and 1495 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:31:48,021 INFO L93 Difference]: Finished difference Result 605 states and 1578 transitions. [2021-10-13 19:31:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:31:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:31:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:31:48,023 INFO L225 Difference]: With dead ends: 605 [2021-10-13 19:31:48,023 INFO L226 Difference]: Without dead ends: 575 [2021-10-13 19:31:48,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 3426.6ms TimeCoverageRelationStatistics Valid=358, Invalid=2948, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 19:31:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-10-13 19:31:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 552. [2021-10-13 19:31:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 550 states have (on average 2.7054545454545456) internal successors, (1488), 551 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1488 transitions. [2021-10-13 19:31:48,037 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1488 transitions. Word has length 21 [2021-10-13 19:31:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:31:48,038 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1488 transitions. [2021-10-13 19:31:48,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1488 transitions. [2021-10-13 19:31:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:31:48,046 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:31:48,046 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:31:48,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-10-13 19:31:48,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:48,262 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:31:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:31:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash -416609646, now seen corresponding path program 43 times [2021-10-13 19:31:48,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:31:48,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580379010] [2021-10-13 19:31:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:31:48,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:31:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:31:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:31:48,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:31:48,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580379010] [2021-10-13 19:31:48,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580379010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:48,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530454305] [2021-10-13 19:31:48,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:31:48,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:48,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:31:48,961 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:31:48,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-10-13 19:31:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:31:52,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-13 19:31:52,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:31:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:31:54,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530454305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:54,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:31:54,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-13 19:31:54,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386634394] [2021-10-13 19:31:54,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 19:31:54,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:31:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 19:31:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 19:31:54,006 INFO L87 Difference]: Start difference. First operand 552 states and 1488 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:31:56,717 INFO L93 Difference]: Finished difference Result 598 states and 1557 transitions. [2021-10-13 19:31:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 19:31:56,718 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:31:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:31:56,720 INFO L225 Difference]: With dead ends: 598 [2021-10-13 19:31:56,720 INFO L226 Difference]: Without dead ends: 584 [2021-10-13 19:31:56,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 3352.7ms TimeCoverageRelationStatistics Valid=465, Invalid=3825, Unknown=0, NotChecked=0, Total=4290 [2021-10-13 19:31:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-10-13 19:31:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 544. [2021-10-13 19:31:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 2.7195571955719555) internal successors, (1474), 543 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1474 transitions. [2021-10-13 19:31:56,732 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1474 transitions. Word has length 21 [2021-10-13 19:31:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:31:56,733 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1474 transitions. [2021-10-13 19:31:56,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:31:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1474 transitions. [2021-10-13 19:31:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:31:56,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:31:56,734 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:31:56,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-10-13 19:31:56,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:56,944 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:31:56,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:31:56,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1279772782, now seen corresponding path program 44 times [2021-10-13 19:31:56,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:31:56,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564888370] [2021-10-13 19:31:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:31:56,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:31:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:31:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:31:58,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:31:58,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564888370] [2021-10-13 19:31:58,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564888370] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:31:58,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743931984] [2021-10-13 19:31:58,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:31:58,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:31:58,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:31:58,149 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:31:58,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-13 19:32:01,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:32:01,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:32:01,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-13 19:32:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:32:01,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 19:32:01,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-10-13 19:32:01,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:32:02,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:32:02,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-13 19:32:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:32:03,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743931984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:03,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:32:03,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 35 [2021-10-13 19:32:03,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771482823] [2021-10-13 19:32:03,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 19:32:03,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:32:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 19:32:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 19:32:03,495 INFO L87 Difference]: Start difference. First operand 544 states and 1474 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:05,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:32:05,792 INFO L93 Difference]: Finished difference Result 552 states and 1486 transitions. [2021-10-13 19:32:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 19:32:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:32:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:32:05,794 INFO L225 Difference]: With dead ends: 552 [2021-10-13 19:32:05,794 INFO L226 Difference]: Without dead ends: 538 [2021-10-13 19:32:05,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3104.7ms TimeCoverageRelationStatistics Valid=268, Invalid=2812, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 19:32:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-13 19:32:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2021-10-13 19:32:05,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 536 states have (on average 2.7257462686567164) internal successors, (1461), 537 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1461 transitions. [2021-10-13 19:32:05,802 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1461 transitions. Word has length 21 [2021-10-13 19:32:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:32:05,802 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1461 transitions. [2021-10-13 19:32:05,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1461 transitions. [2021-10-13 19:32:05,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:32:05,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:32:05,803 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:32:05,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-10-13 19:32:06,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:32:06,004 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:32:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:32:06,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1276082542, now seen corresponding path program 45 times [2021-10-13 19:32:06,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:32:06,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938443140] [2021-10-13 19:32:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:32:06,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:32:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:32:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:32:06,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:32:06,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938443140] [2021-10-13 19:32:06,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938443140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:06,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477303338] [2021-10-13 19:32:06,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:32:06,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:32:06,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:32:06,625 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:32:06,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-10-13 19:32:10,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 19:32:10,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:32:10,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 19:32:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:32:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:32:11,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477303338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:11,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:32:11,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-13 19:32:11,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379293288] [2021-10-13 19:32:11,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 19:32:11,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:32:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 19:32:11,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 19:32:11,673 INFO L87 Difference]: Start difference. First operand 538 states and 1461 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:13,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:32:13,795 INFO L93 Difference]: Finished difference Result 586 states and 1531 transitions. [2021-10-13 19:32:13,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 19:32:13,795 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:32:13,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:32:13,796 INFO L225 Difference]: With dead ends: 586 [2021-10-13 19:32:13,796 INFO L226 Difference]: Without dead ends: 568 [2021-10-13 19:32:13,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 2631.0ms TimeCoverageRelationStatistics Valid=391, Invalid=3149, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 19:32:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-10-13 19:32:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 528. [2021-10-13 19:32:13,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 526 states have (on average 2.7452471482889735) internal successors, (1444), 527 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1444 transitions. [2021-10-13 19:32:13,805 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1444 transitions. Word has length 21 [2021-10-13 19:32:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:32:13,805 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1444 transitions. [2021-10-13 19:32:13,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1444 transitions. [2021-10-13 19:32:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:32:13,807 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:32:13,807 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:32:13,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-10-13 19:32:14,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-10-13 19:32:14,021 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:32:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:32:14,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1850858347, now seen corresponding path program 42 times [2021-10-13 19:32:14,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:32:14,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856882918] [2021-10-13 19:32:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:32:14,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:32:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:32:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:32:14,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:32:14,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856882918] [2021-10-13 19:32:14,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856882918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:14,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987725668] [2021-10-13 19:32:14,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:32:14,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:32:14,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:32:14,766 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:32:14,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-10-13 19:32:18,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:32:18,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:32:18,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-13 19:32:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:32:18,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-13 19:32:18,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:32:18,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-13 19:32:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:32:19,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987725668] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:19,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:32:19,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 30 [2021-10-13 19:32:19,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069472780] [2021-10-13 19:32:19,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 19:32:19,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:32:19,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 19:32:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-10-13 19:32:19,778 INFO L87 Difference]: Start difference. First operand 528 states and 1444 transitions. Second operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:32:22,546 INFO L93 Difference]: Finished difference Result 556 states and 1482 transitions. [2021-10-13 19:32:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 19:32:22,547 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:32:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:32:22,548 INFO L225 Difference]: With dead ends: 556 [2021-10-13 19:32:22,548 INFO L226 Difference]: Without dead ends: 540 [2021-10-13 19:32:22,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3258.3ms TimeCoverageRelationStatistics Valid=452, Invalid=2518, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 19:32:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-10-13 19:32:22,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 524. [2021-10-13 19:32:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 522 states have (on average 2.743295019157088) internal successors, (1432), 523 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1432 transitions. [2021-10-13 19:32:22,556 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1432 transitions. Word has length 21 [2021-10-13 19:32:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:32:22,556 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1432 transitions. [2021-10-13 19:32:22,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1432 transitions. [2021-10-13 19:32:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:32:22,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:32:22,557 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:32:22,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-10-13 19:32:22,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:32:22,758 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:32:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:32:22,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1847168110, now seen corresponding path program 46 times [2021-10-13 19:32:22,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:32:22,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048796758] [2021-10-13 19:32:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:32:22,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:32:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:32:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:32:23,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:32:23,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048796758] [2021-10-13 19:32:23,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048796758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:23,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269706125] [2021-10-13 19:32:23,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:32:23,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:32:23,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:32:23,480 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:32:23,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-10-13 19:32:27,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:32:27,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:32:27,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-13 19:32:27,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:32:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:32:28,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269706125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:28,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:32:28,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-13 19:32:28,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8846554] [2021-10-13 19:32:28,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 19:32:28,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:32:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 19:32:28,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 19:32:28,922 INFO L87 Difference]: Start difference. First operand 524 states and 1432 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:32:30,745 INFO L93 Difference]: Finished difference Result 534 states and 1441 transitions. [2021-10-13 19:32:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:32:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:32:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:32:30,746 INFO L225 Difference]: With dead ends: 534 [2021-10-13 19:32:30,746 INFO L226 Difference]: Without dead ends: 516 [2021-10-13 19:32:30,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2506.6ms TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 19:32:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-10-13 19:32:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 510. [2021-10-13 19:32:30,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 508 states have (on average 2.7618110236220472) internal successors, (1403), 509 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1403 transitions. [2021-10-13 19:32:30,754 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1403 transitions. Word has length 21 [2021-10-13 19:32:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:32:30,754 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 1403 transitions. [2021-10-13 19:32:30,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1403 transitions. [2021-10-13 19:32:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:32:30,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:32:30,755 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:32:30,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-10-13 19:32:30,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-10-13 19:32:30,956 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:32:30,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:32:30,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1699037213, now seen corresponding path program 43 times [2021-10-13 19:32:30,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:32:30,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482975453] [2021-10-13 19:32:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:32:30,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:32:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:32:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:32:31,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:32:31,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482975453] [2021-10-13 19:32:31,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482975453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:31,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685930287] [2021-10-13 19:32:31,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:32:31,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:32:31,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:32:31,685 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:32:31,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-10-13 19:32:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:32:35,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 19:32:35,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:32:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:32:36,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685930287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:36,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:32:36,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 34 [2021-10-13 19:32:36,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113599960] [2021-10-13 19:32:36,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 19:32:36,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:32:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 19:32:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 19:32:36,867 INFO L87 Difference]: Start difference. First operand 510 states and 1403 transitions. Second operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:32:38,809 INFO L93 Difference]: Finished difference Result 512 states and 1402 transitions. [2021-10-13 19:32:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:32:38,810 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:32:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:32:38,811 INFO L225 Difference]: With dead ends: 512 [2021-10-13 19:32:38,811 INFO L226 Difference]: Without dead ends: 490 [2021-10-13 19:32:38,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2717.6ms TimeCoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 19:32:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-10-13 19:32:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2021-10-13 19:32:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 488 states have (on average 2.7971311475409837) internal successors, (1365), 489 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1365 transitions. [2021-10-13 19:32:38,821 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1365 transitions. Word has length 21 [2021-10-13 19:32:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:32:38,821 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1365 transitions. [2021-10-13 19:32:38,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1365 transitions. [2021-10-13 19:32:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:32:38,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:32:38,822 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:32:38,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-10-13 19:32:39,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:32:39,023 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:32:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:32:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2097689858, now seen corresponding path program 47 times [2021-10-13 19:32:39,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:32:39,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370263290] [2021-10-13 19:32:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:32:39,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:32:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:32:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:32:43,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:32:43,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370263290] [2021-10-13 19:32:43,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370263290] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:43,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520647633] [2021-10-13 19:32:43,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:32:43,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:32:43,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:32:43,442 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:32:43,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-10-13 19:32:47,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:32:47,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:32:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 19:32:47,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:32:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:32:48,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520647633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:48,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:32:48,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2021-10-13 19:32:48,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683011730] [2021-10-13 19:32:48,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 19:32:48,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:32:48,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 19:32:48,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 19:32:48,349 INFO L87 Difference]: Start difference. First operand 490 states and 1365 transitions. Second operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:32:52,072 INFO L93 Difference]: Finished difference Result 602 states and 1633 transitions. [2021-10-13 19:32:52,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 19:32:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:32:52,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:32:52,074 INFO L225 Difference]: With dead ends: 602 [2021-10-13 19:32:52,074 INFO L226 Difference]: Without dead ends: 602 [2021-10-13 19:32:52,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 5009.3ms TimeCoverageRelationStatistics Valid=196, Invalid=2060, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 19:32:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-10-13 19:32:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 488. [2021-10-13 19:32:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 486 states have (on average 2.7901234567901234) internal successors, (1356), 487 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1356 transitions. [2021-10-13 19:32:52,083 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1356 transitions. Word has length 21 [2021-10-13 19:32:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:32:52,083 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 1356 transitions. [2021-10-13 19:32:52,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:32:52,084 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1356 transitions. [2021-10-13 19:32:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:32:52,084 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:32:52,084 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:32:52,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-10-13 19:32:52,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-10-13 19:32:52,285 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:32:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:32:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1983292418, now seen corresponding path program 48 times [2021-10-13 19:32:52,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:32:52,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335269229] [2021-10-13 19:32:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:32:52,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:32:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:32:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:32:53,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:32:53,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335269229] [2021-10-13 19:32:53,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335269229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:53,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952623622] [2021-10-13 19:32:53,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:32:53,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:32:53,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:32:53,194 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:32:53,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-10-13 19:32:57,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 19:32:57,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:32:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 19:32:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:32:58,301 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:32:58,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952623622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:32:58,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:32:58,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 31 [2021-10-13 19:32:58,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783307157] [2021-10-13 19:32:58,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 19:32:58,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:32:58,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 19:32:58,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 19:32:58,303 INFO L87 Difference]: Start difference. First operand 488 states and 1356 transitions. Second operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:33:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:33:00,565 INFO L93 Difference]: Finished difference Result 588 states and 1586 transitions. [2021-10-13 19:33:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 19:33:00,565 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:33:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:33:00,567 INFO L225 Difference]: With dead ends: 588 [2021-10-13 19:33:00,567 INFO L226 Difference]: Without dead ends: 588 [2021-10-13 19:33:00,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2437.5ms TimeCoverageRelationStatistics Valid=244, Invalid=2618, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 19:33:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-10-13 19:33:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 472. [2021-10-13 19:33:00,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 470 states have (on average 2.7574468085106383) internal successors, (1296), 471 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:33:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1296 transitions. [2021-10-13 19:33:00,575 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1296 transitions. Word has length 21 [2021-10-13 19:33:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:33:00,575 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1296 transitions. [2021-10-13 19:33:00,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:33:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1296 transitions. [2021-10-13 19:33:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:33:00,576 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:33:00,576 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:33:00,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-10-13 19:33:00,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:33:00,779 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:33:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:33:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1979598455, now seen corresponding path program 44 times [2021-10-13 19:33:00,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:33:00,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306271851] [2021-10-13 19:33:00,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:33:00,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:33:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:33:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:33:02,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:33:02,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306271851] [2021-10-13 19:33:02,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306271851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:33:02,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874852539] [2021-10-13 19:33:02,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:33:02,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:33:02,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:33:02,431 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:33:02,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-10-13 19:33:06,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:33:06,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:33:06,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 19:33:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:33:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:33:07,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874852539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:33:07,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:33:07,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 32 [2021-10-13 19:33:07,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337209852] [2021-10-13 19:33:07,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 19:33:07,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:33:07,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 19:33:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 19:33:07,678 INFO L87 Difference]: Start difference. First operand 472 states and 1296 transitions. Second operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:33:12,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:33:12,295 INFO L93 Difference]: Finished difference Result 732 states and 1974 transitions. [2021-10-13 19:33:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-13 19:33:12,296 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 19:33:12,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:33:12,298 INFO L225 Difference]: With dead ends: 732 [2021-10-13 19:33:12,298 INFO L226 Difference]: Without dead ends: 732 [2021-10-13 19:33:12,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 4598.2ms TimeCoverageRelationStatistics Valid=433, Invalid=4969, Unknown=0, NotChecked=0, Total=5402 [2021-10-13 19:33:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-10-13 19:33:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 530. [2021-10-13 19:33:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 528 states have (on average 2.903409090909091) internal successors, (1533), 529 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:33:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1533 transitions. [2021-10-13 19:33:12,308 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1533 transitions. Word has length 21 [2021-10-13 19:33:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:33:12,309 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1533 transitions. [2021-10-13 19:33:12,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:33:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1533 transitions. [2021-10-13 19:33:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 19:33:12,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:33:12,310 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:33:12,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-10-13 19:33:12,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-10-13 19:33:12,511 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2021-10-13 19:33:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:33:12,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1452205702, now seen corresponding path program 49 times [2021-10-13 19:33:12,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:33:12,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230149388] [2021-10-13 19:33:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:33:12,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:33:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:33:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:33:14,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:33:14,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230149388] [2021-10-13 19:33:14,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230149388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:33:14,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536023968] [2021-10-13 19:33:14,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 19:33:14,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:33:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:33:14,279 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 19:33:14,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-10-13 19:33:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:33:18,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 19:33:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:33:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:33:19,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536023968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:33:19,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:33:19,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 31 [2021-10-13 19:33:19,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712515415] [2021-10-13 19:33:19,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 19:33:19,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:33:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 19:33:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 19:33:19,333 INFO L87 Difference]: Start difference. First operand 530 states and 1533 transitions. Second operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-10-13 19:33:21,070 WARN L223 SmtUtils]: Removed 6 from assertion stack [2021-10-13 19:33:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:33:21,072 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,087 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/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 [2021-10-13 19:33:21,090 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-13 19:33:21,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-10-13 19:33:21,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:33:21,273 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. [2021-10-13 19:33:21,276 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,276 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-13 19:33:21,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-13 19:33:21,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,278 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,279 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-13 19:33:21,285 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-13 19:33:21,285 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 19:33:21,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:33:21 BasicIcfg [2021-10-13 19:33:21,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 19:33:21,287 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.witnessprinter [2021-10-13 19:33:21,288 INFO L168 Benchmark]: Toolchain (without parser) took 729976.91 ms. Allocated memory was 159.4 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 135.0 MB in the beginning and 648.5 MB in the end (delta: -513.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-10-13 19:33:21,288 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 159.4 MB. Free memory was 130.0 MB in the beginning and 130.0 MB in the end (delta: 80.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-10-13 19:33:21,288 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.94 ms. Allocated memory is still 159.4 MB. Free memory was 134.7 MB in the beginning and 124.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-13 19:33:21,288 INFO L168 Benchmark]: Boogie Procedure Inliner took 93.63 ms. Allocated memory is still 159.4 MB. Free memory was 124.1 MB in the beginning and 122.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 19:33:21,289 INFO L168 Benchmark]: Boogie Preprocessor took 77.98 ms. Allocated memory is still 159.4 MB. Free memory was 122.3 MB in the beginning and 120.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-13 19:33:21,289 INFO L168 Benchmark]: RCFGBuilder took 613.33 ms. Allocated memory is still 159.4 MB. Free memory was 120.7 MB in the beginning and 139.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2021-10-13 19:33:21,289 INFO L168 Benchmark]: TraceAbstraction took 728809.76 ms. Allocated memory was 159.4 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 139.3 MB in the beginning and 648.5 MB in the end (delta: -509.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-10-13 19:33:21,291 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 159.4 MB. Free memory was 130.0 MB in the beginning and 130.0 MB in the end (delta: 80.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 362.94 ms. Allocated memory is still 159.4 MB. Free memory was 134.7 MB in the beginning and 124.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 93.63 ms. Allocated memory is still 159.4 MB. Free memory was 124.1 MB in the beginning and 122.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.98 ms. Allocated memory is still 159.4 MB. Free memory was 122.3 MB in the beginning and 120.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 613.33 ms. Allocated memory is still 159.4 MB. Free memory was 120.7 MB in the beginning and 139.8 MB in the end (delta: -19.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 728809.76 ms. Allocated memory was 159.4 MB in the beginning and 1.7 GB in the end (delta: 1.6 GB). Free memory was 139.3 MB in the beginning and 648.5 MB in the end (delta: -509.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8831.7ms, 161 PlacesBefore, 32 PlacesAfterwards, 168 TransitionsBefore, 28 TransitionsAfterwards, 3476 CoEnabledTransitionPairs, 8 FixpointIterations, 75 TrivialSequentialCompositions, 92 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 11 ConcurrentYvCompositions, 11 ChoiceCompositions, 201 TotalNumberOfCompositions, 4152 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3854, positive: 3816, positive conditional: 0, positive unconditional: 3816, negative: 38, negative conditional: 0, negative unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2412, positive: 2395, positive conditional: 0, positive unconditional: 2395, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2412, positive: 2392, positive conditional: 0, positive unconditional: 2392, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 20, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 51, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3854, positive: 1421, positive conditional: 0, positive unconditional: 1421, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 2412, unknown conditional: 0, unknown unconditional: 2412] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - 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: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (530states) and FLOYD_HOARE automaton (currently 24 states, 33 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 61 for 43ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 223 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 728657.5ms, OverallIterations: 103, TraceHistogramMax: 6, EmptinessCheckTime: 133.3ms, AutomataDifference: 277197.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8953.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1375 SDtfs, 7629 SDslu, 16650 SDs, 0 SdLazy, 67592 SolverSat, 5569 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 69603.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4951 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 4499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47145 ImplicationChecksByTransitivity, 297957.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3554occurred in iteration=81, InterpolantAutomatonStates: 2808, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1890.3ms AutomataMinimizationTime, 102 MinimizatonAttempts, 14393 StatesRemovedByMinimization, 91 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1249.4ms SsaConstructionTime, 14306.7ms SatisfiabilityAnalysisTime, 244755.0ms InterpolantComputationTime, 3481 NumberOfCodeBlocks, 3467 NumberOfCodeBlocksAsserted, 339 NumberOfCheckSat, 3279 ConstructedInterpolants, 159 QuantifiedInterpolants, 125496 SizeOfPredicates, 1873 NumberOfNonLiveVariables, 17982 ConjunctsInSsa, 3625 ConjunctsInUnsatCore, 202 InterpolantComputations, 9 PerfectInterpolantSequences, 446/4644 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