/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/parallel-misc-3-extended.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c503be2 [2021-10-13 19:11:21,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 19:11:21,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 19:11:21,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-13 19:11:21,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 19:11:21,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 19:11:21,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 19:11:21,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 19:11:21,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 19:11:21,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 19:11:21,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 19:11:21,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 19:11:21,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 19:11:21,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 19:11:21,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 19:11:21,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 19:11:21,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-10-13 19:11:21,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 19:11:21,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 19:11:21,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 19:11:21,611 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 19:11:21,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 19:11:21,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 19:11:21,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 19:11:21,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 19:11:21,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 19:11:21,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 19:11:21,675 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 19:11:21,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 19:11:21,675 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 19:11:21,675 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 19:11:21,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 19:11:21,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 19:11:21,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 19:11:21,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 19:11:21,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 19:11:21,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 19:11:21,678 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-13 19:11:21,679 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 19:11:21,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 19:11:21,679 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 19:11:21,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 19:11:21,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 19:11:21,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 19:11:21,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 19:11:21,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:11:21,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 19:11:21,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 19:11:21,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 19:11:21,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 19:11:21,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 19:11:21,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 19:11:21,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 19:11:21,682 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-13 19:11:22,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 19:11:22,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 19:11:22,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 19:11:22,273 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 19:11:22,274 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 19:11:22,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2021-10-13 19:11:22,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67938d4ae/758c3925542a4e0da4caaa482ffd4a55/FLAG49b6b6e79 [2021-10-13 19:11:23,142 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 19:11:23,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3-extended.wvr.c [2021-10-13 19:11:23,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67938d4ae/758c3925542a4e0da4caaa482ffd4a55/FLAG49b6b6e79 [2021-10-13 19:11:23,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67938d4ae/758c3925542a4e0da4caaa482ffd4a55 [2021-10-13 19:11:23,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 19:11:23,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 19:11:23,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 19:11:23,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 19:11:23,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 19:11:23,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c12a49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23, skipping insertion in model container [2021-10-13 19:11:23,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 19:11:23,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 19:11:23,794 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/parallel-misc-3-extended.wvr.c[2600,2613] [2021-10-13 19:11:23,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:11:23,808 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 19:11:23,838 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/parallel-misc-3-extended.wvr.c[2600,2613] [2021-10-13 19:11:23,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 19:11:23,858 INFO L208 MainTranslator]: Completed translation [2021-10-13 19:11:23,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23 WrapperNode [2021-10-13 19:11:23,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 19:11:23,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 19:11:23,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 19:11:23,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 19:11:23,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 19:11:23,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 19:11:23,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 19:11:23,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 19:11:23,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 19:11:23,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 19:11:23,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 19:11:23,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 19:11:23,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (1/1) ... [2021-10-13 19:11:23,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 19:11:24,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:24,024 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 19:11:24,048 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 19:11:24,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-13 19:11:24,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-13 19:11:24,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-13 19:11:24,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-13 19:11:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-13 19:11:24,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-13 19:11:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 19:11:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 19:11:24,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 19:11:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-13 19:11:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-13 19:11:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 19:11:24,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 19:11:24,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 19:11:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 19:11:24,096 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 19:11:24,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 19:11:24,704 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-13 19:11:24,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:11:24 BoogieIcfgContainer [2021-10-13 19:11:24,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 19:11:24,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 19:11:24,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 19:11:24,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 19:11:24,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:11:23" (1/3) ... [2021-10-13 19:11:24,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cd55a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:11:24, skipping insertion in model container [2021-10-13 19:11:24,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:11:23" (2/3) ... [2021-10-13 19:11:24,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cd55a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:11:24, skipping insertion in model container [2021-10-13 19:11:24,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:11:24" (3/3) ... [2021-10-13 19:11:24,721 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3-extended.wvr.c [2021-10-13 19:11:24,728 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-13 19:11:24,728 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 19:11:24,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-10-13 19:11:24,729 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-13 19:11:24,813 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,816 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,817 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,817 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,817 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,818 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,822 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,823 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,823 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,823 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,823 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,824 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,824 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,824 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,825 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,825 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,825 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,826 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,826 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,826 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,826 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,827 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,827 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,827 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,828 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,829 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,829 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,829 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,830 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,831 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,832 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,832 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,832 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,833 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,834 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,834 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,834 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,836 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,836 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,836 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,836 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,837 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,837 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,837 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,837 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,842 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,842 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,843 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,845 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,846 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,846 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,846 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,847 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,849 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,849 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,850 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-13 19:11:24,861 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-13 19:11:24,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 19:11:24,940 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 19:11:24,940 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-10-13 19:11:24,961 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-13 19:11:24,979 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 142 transitions, 308 flow [2021-10-13 19:11:24,983 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 142 transitions, 308 flow [2021-10-13 19:11:24,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 142 transitions, 308 flow [2021-10-13 19:11:25,056 INFO L129 PetriNetUnfolder]: 16/139 cut-off events. [2021-10-13 19:11:25,057 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-13 19:11:25,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 16/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 242 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 90. Up to 4 conditions per place. [2021-10-13 19:11:25,073 INFO L116 LiptonReduction]: Number of co-enabled transitions 5030 [2021-10-13 19:11:31,187 INFO L131 LiptonReduction]: Checked pairs total: 9636 [2021-10-13 19:11:31,187 INFO L133 LiptonReduction]: Total number of compositions: 127 [2021-10-13 19:11:31,199 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 44 transitions, 112 flow [2021-10-13 19:11:31,299 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1548 states, 1424 states have (on average 3.8644662921348316) internal successors, (5503), 1547 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand has 1548 states, 1424 states have (on average 3.8644662921348316) internal successors, (5503), 1547 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 19:11:31,315 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:31,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 19:11:31,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:31,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:31,323 INFO L82 PathProgramCache]: Analyzing trace with hash 592693, now seen corresponding path program 1 times [2021-10-13 19:11:31,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:31,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971128735] [2021-10-13 19:11:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:31,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:31,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:31,546 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 19:11:31,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:31,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971128735] [2021-10-13 19:11:31,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971128735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:11:31,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:11:31,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 19:11:31,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901573234] [2021-10-13 19:11:31,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:11:31,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:11:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:11:31,583 INFO L87 Difference]: Start difference. First operand has 1548 states, 1424 states have (on average 3.8644662921348316) internal successors, (5503), 1547 states have internal predecessors, (5503), 0 states have call successors, (0), 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 1.5) 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 19:11:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:31,729 INFO L93 Difference]: Finished difference Result 1798 states and 6388 transitions. [2021-10-13 19:11:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:11:31,732 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 3 [2021-10-13 19:11:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:31,777 INFO L225 Difference]: With dead ends: 1798 [2021-10-13 19:11:31,777 INFO L226 Difference]: Without dead ends: 1798 [2021-10-13 19:11:31,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:11:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-10-13 19:11:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1762. [2021-10-13 19:11:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1638 states have (on average 3.851037851037851) internal successors, (6308), 1761 states have internal predecessors, (6308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6308 transitions. [2021-10-13 19:11:31,968 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6308 transitions. Word has length 3 [2021-10-13 19:11:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:31,969 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 6308 transitions. [2021-10-13 19:11:31,969 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 19:11:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6308 transitions. [2021-10-13 19:11:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 19:11:31,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:31,970 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 19:11:31,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 19:11:31,972 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:31,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:31,973 INFO L82 PathProgramCache]: Analyzing trace with hash 18375068, now seen corresponding path program 1 times [2021-10-13 19:11:31,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:31,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199243626] [2021-10-13 19:11:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:31,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:32,094 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 19:11:32,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:32,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199243626] [2021-10-13 19:11:32,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199243626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:32,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806919280] [2021-10-13 19:11:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:32,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:32,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:32,098 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 19:11:32,127 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 19:11:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:32,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:11:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:11:32,730 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 19:11:32,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806919280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:32,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:11:32,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-13 19:11:32,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989644385] [2021-10-13 19:11:32,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:11:32,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:32,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:11:32,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:11:32,735 INFO L87 Difference]: Start difference. First operand 1762 states and 6308 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 19:11:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:33,081 INFO L93 Difference]: Finished difference Result 5052 states and 17073 transitions. [2021-10-13 19:11:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 19:11:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 4 [2021-10-13 19:11:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:33,146 INFO L225 Difference]: With dead ends: 5052 [2021-10-13 19:11:33,146 INFO L226 Difference]: Without dead ends: 5052 [2021-10-13 19:11:33,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:11:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2021-10-13 19:11:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 3060. [2021-10-13 19:11:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 2936 states have (on average 4.202656675749319) internal successors, (12339), 3059 states have internal predecessors, (12339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 12339 transitions. [2021-10-13 19:11:33,421 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 12339 transitions. Word has length 4 [2021-10-13 19:11:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:33,422 INFO L470 AbstractCegarLoop]: Abstraction has 3060 states and 12339 transitions. [2021-10-13 19:11:33,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 19:11:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 12339 transitions. [2021-10-13 19:11:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 19:11:33,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:33,424 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 19:11:33,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 19:11:33,634 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 19:11:33,635 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:33,636 INFO L82 PathProgramCache]: Analyzing trace with hash 18375070, now seen corresponding path program 1 times [2021-10-13 19:11:33,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:33,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849560714] [2021-10-13 19:11:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:33,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:33,813 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 19:11:33,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:33,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849560714] [2021-10-13 19:11:33,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849560714] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:33,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682270671] [2021-10-13 19:11:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:33,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:33,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:33,819 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 19:11:33,847 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 19:11:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:33,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:11:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:11:34,066 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 19:11:34,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682270671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:34,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:11:34,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-13 19:11:34,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997691032] [2021-10-13 19:11:34,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:11:34,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:34,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:11:34,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 19:11:34,070 INFO L87 Difference]: Start difference. First operand 3060 states and 12339 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 19:11:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:34,510 INFO L93 Difference]: Finished difference Result 5570 states and 21636 transitions. [2021-10-13 19:11:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 19:11:34,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 4 [2021-10-13 19:11:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:34,641 INFO L225 Difference]: With dead ends: 5570 [2021-10-13 19:11:34,641 INFO L226 Difference]: Without dead ends: 5570 [2021-10-13 19:11:34,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:11:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2021-10-13 19:11:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 3978. [2021-10-13 19:11:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3854 states have (on average 4.459782044628957) internal successors, (17188), 3977 states have internal predecessors, (17188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 17188 transitions. [2021-10-13 19:11:35,029 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 17188 transitions. Word has length 4 [2021-10-13 19:11:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:35,029 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 17188 transitions. [2021-10-13 19:11:35,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 19:11:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 17188 transitions. [2021-10-13 19:11:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:11:35,036 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:35,041 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-13 19:11:35,084 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 19:11:35,243 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 19:11:35,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:35,244 INFO L82 PathProgramCache]: Analyzing trace with hash 569628678, now seen corresponding path program 1 times [2021-10-13 19:11:35,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:35,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731628434] [2021-10-13 19:11:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:35,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:11:35,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:35,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731628434] [2021-10-13 19:11:35,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731628434] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:11:35,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:11:35,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 19:11:35,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739437286] [2021-10-13 19:11:35,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:11:35,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:35,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:11:35,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:11:35,310 INFO L87 Difference]: Start difference. First operand 3978 states and 17188 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 19:11:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:35,514 INFO L93 Difference]: Finished difference Result 5936 states and 24801 transitions. [2021-10-13 19:11:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:11:35,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 5 [2021-10-13 19:11:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:35,571 INFO L225 Difference]: With dead ends: 5936 [2021-10-13 19:11:35,571 INFO L226 Difference]: Without dead ends: 5936 [2021-10-13 19:11:35,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 19:11:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-10-13 19:11:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 5210. [2021-10-13 19:11:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5210 states, 5086 states have (on average 4.579630357845065) internal successors, (23292), 5209 states have internal predecessors, (23292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5210 states to 5210 states and 23292 transitions. [2021-10-13 19:11:35,986 INFO L78 Accepts]: Start accepts. Automaton has 5210 states and 23292 transitions. Word has length 5 [2021-10-13 19:11:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:35,986 INFO L470 AbstractCegarLoop]: Abstraction has 5210 states and 23292 transitions. [2021-10-13 19:11:35,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 19:11:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5210 states and 23292 transitions. [2021-10-13 19:11:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 19:11:35,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:35,987 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-13 19:11:35,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 19:11:35,988 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash 569628679, now seen corresponding path program 1 times [2021-10-13 19:11:35,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:35,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593512006] [2021-10-13 19:11:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:35,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:36,162 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 19:11:36,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:36,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593512006] [2021-10-13 19:11:36,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593512006] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:36,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150707305] [2021-10-13 19:11:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:36,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:36,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:36,174 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 19:11:36,193 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 19:11:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:36,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 19:11:36,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:11:36,821 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 19:11:36,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150707305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:36,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:11:36,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-13 19:11:36,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046823786] [2021-10-13 19:11:36,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:11:36,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:36,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:11:36,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:11:36,826 INFO L87 Difference]: Start difference. First operand 5210 states and 23292 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 19:11:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:37,503 INFO L93 Difference]: Finished difference Result 10108 states and 38674 transitions. [2021-10-13 19:11:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 19:11:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 5 [2021-10-13 19:11:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:37,673 INFO L225 Difference]: With dead ends: 10108 [2021-10-13 19:11:37,673 INFO L226 Difference]: Without dead ends: 10108 [2021-10-13 19:11:37,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-10-13 19:11:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10108 states. [2021-10-13 19:11:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10108 to 6526. [2021-10-13 19:11:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6526 states, 6402 states have (on average 4.260699781318338) internal successors, (27277), 6525 states have internal predecessors, (27277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6526 states to 6526 states and 27277 transitions. [2021-10-13 19:11:38,199 INFO L78 Accepts]: Start accepts. Automaton has 6526 states and 27277 transitions. Word has length 5 [2021-10-13 19:11:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:38,200 INFO L470 AbstractCegarLoop]: Abstraction has 6526 states and 27277 transitions. [2021-10-13 19:11:38,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 19:11:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6526 states and 27277 transitions. [2021-10-13 19:11:38,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 19:11:38,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:38,202 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2021-10-13 19:11:38,245 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 19:11:38,417 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 19:11:38,418 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash 478621886, now seen corresponding path program 2 times [2021-10-13 19:11:38,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:38,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265366719] [2021-10-13 19:11:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:38,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 19:11:38,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:38,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265366719] [2021-10-13 19:11:38,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265366719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:38,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139314911] [2021-10-13 19:11:38,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:11:38,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:38,559 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 19:11:38,584 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 19:11:38,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:11:38,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:11:38,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:11:38,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:11:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:11:39,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139314911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:39,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:11:39,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-10-13 19:11:39,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19218362] [2021-10-13 19:11:39,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 19:11:39,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:39,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 19:11:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 19:11:39,181 INFO L87 Difference]: Start difference. First operand 6526 states and 27277 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:39,925 INFO L93 Difference]: Finished difference Result 14284 states and 53230 transitions. [2021-10-13 19:11:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:11:39,926 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 19:11:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:40,072 INFO L225 Difference]: With dead ends: 14284 [2021-10-13 19:11:40,072 INFO L226 Difference]: Without dead ends: 14268 [2021-10-13 19:11:40,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:11:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14268 states. [2021-10-13 19:11:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14268 to 7934. [2021-10-13 19:11:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7810 states have (on average 4.276696542893726) internal successors, (33401), 7933 states have internal predecessors, (33401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 33401 transitions. [2021-10-13 19:11:40,812 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 33401 transitions. Word has length 6 [2021-10-13 19:11:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:40,813 INFO L470 AbstractCegarLoop]: Abstraction has 7934 states and 33401 transitions. [2021-10-13 19:11:40,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 33401 transitions. [2021-10-13 19:11:40,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 19:11:40,815 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:40,815 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-13 19:11:40,854 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 19:11:41,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:41,029 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:41,030 INFO L82 PathProgramCache]: Analyzing trace with hash -121263379, now seen corresponding path program 1 times [2021-10-13 19:11:41,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:41,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978141670] [2021-10-13 19:11:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:41,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:41,084 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 19:11:41,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:41,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978141670] [2021-10-13 19:11:41,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978141670] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:11:41,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:11:41,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 19:11:41,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434606860] [2021-10-13 19:11:41,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:11:41,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:41,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:11:41,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:11:41,087 INFO L87 Difference]: Start difference. First operand 7934 states and 33401 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 19:11:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:41,378 INFO L93 Difference]: Finished difference Result 10434 states and 42785 transitions. [2021-10-13 19:11:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:11:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 8 [2021-10-13 19:11:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:41,483 INFO L225 Difference]: With dead ends: 10434 [2021-10-13 19:11:41,484 INFO L226 Difference]: Without dead ends: 10434 [2021-10-13 19:11:41,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:11:41,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10434 states. [2021-10-13 19:11:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10434 to 7912. [2021-10-13 19:11:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7912 states, 7788 states have (on average 4.317668207498716) internal successors, (33626), 7911 states have internal predecessors, (33626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:42,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7912 states to 7912 states and 33626 transitions. [2021-10-13 19:11:42,179 INFO L78 Accepts]: Start accepts. Automaton has 7912 states and 33626 transitions. Word has length 8 [2021-10-13 19:11:42,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:42,184 INFO L470 AbstractCegarLoop]: Abstraction has 7912 states and 33626 transitions. [2021-10-13 19:11:42,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 19:11:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 7912 states and 33626 transitions. [2021-10-13 19:11:42,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 19:11:42,188 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:42,188 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:11:42,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 19:11:42,189 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:42,190 INFO L82 PathProgramCache]: Analyzing trace with hash -236535499, now seen corresponding path program 1 times [2021-10-13 19:11:42,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:42,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219043094] [2021-10-13 19:11:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:42,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:42,255 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 19:11:42,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:42,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219043094] [2021-10-13 19:11:42,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219043094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:42,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864583595] [2021-10-13 19:11:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:42,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:42,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:42,261 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 19:11:42,269 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 19:11:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:42,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 19:11:42,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:11:42,393 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 19:11:42,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864583595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:42,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:11:42,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-13 19:11:42,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792706396] [2021-10-13 19:11:42,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 19:11:42,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:42,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 19:11:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:11:42,396 INFO L87 Difference]: Start difference. First operand 7912 states and 33626 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:42,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:42,817 INFO L93 Difference]: Finished difference Result 13154 states and 53132 transitions. [2021-10-13 19:11:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:11:42,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 19:11:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:42,906 INFO L225 Difference]: With dead ends: 13154 [2021-10-13 19:11:42,906 INFO L226 Difference]: Without dead ends: 13154 [2021-10-13 19:11:42,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:11:42,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13154 states. [2021-10-13 19:11:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13154 to 9674. [2021-10-13 19:11:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9674 states, 9550 states have (on average 4.425968586387435) internal successors, (42268), 9673 states have internal predecessors, (42268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9674 states to 9674 states and 42268 transitions. [2021-10-13 19:11:43,750 INFO L78 Accepts]: Start accepts. Automaton has 9674 states and 42268 transitions. Word has length 8 [2021-10-13 19:11:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:43,750 INFO L470 AbstractCegarLoop]: Abstraction has 9674 states and 42268 transitions. [2021-10-13 19:11:43,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 9674 states and 42268 transitions. [2021-10-13 19:11:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 19:11:43,758 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:43,758 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:11:43,817 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 19:11:43,973 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 19:11:43,974 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:43,975 INFO L82 PathProgramCache]: Analyzing trace with hash 424109002, now seen corresponding path program 1 times [2021-10-13 19:11:43,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:43,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926512071] [2021-10-13 19:11:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:43,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:44,063 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 19:11:44,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:44,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926512071] [2021-10-13 19:11:44,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926512071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:44,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210859649] [2021-10-13 19:11:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:44,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:44,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:44,077 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 19:11:44,110 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 19:11:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:44,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:11:44,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:11:44,375 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 19:11:44,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210859649] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:44,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:11:44,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-10-13 19:11:44,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102795813] [2021-10-13 19:11:44,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 19:11:44,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:44,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 19:11:44,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-10-13 19:11:44,378 INFO L87 Difference]: Start difference. First operand 9674 states and 42268 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 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 19:11:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:44,957 INFO L93 Difference]: Finished difference Result 17064 states and 70852 transitions. [2021-10-13 19:11:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 19:11:44,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 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 19:11:44,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:45,045 INFO L225 Difference]: With dead ends: 17064 [2021-10-13 19:11:45,045 INFO L226 Difference]: Without dead ends: 17062 [2021-10-13 19:11:45,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:11:45,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17062 states. [2021-10-13 19:11:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17062 to 12038. [2021-10-13 19:11:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12038 states, 11914 states have (on average 4.404314252140339) internal successors, (52473), 12037 states have internal predecessors, (52473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12038 states to 12038 states and 52473 transitions. [2021-10-13 19:11:45,895 INFO L78 Accepts]: Start accepts. Automaton has 12038 states and 52473 transitions. Word has length 9 [2021-10-13 19:11:45,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:45,895 INFO L470 AbstractCegarLoop]: Abstraction has 12038 states and 52473 transitions. [2021-10-13 19:11:45,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 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 19:11:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 12038 states and 52473 transitions. [2021-10-13 19:11:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:11:45,902 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:45,902 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:11:45,942 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 19:11:46,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:46,116 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash -569698805, now seen corresponding path program 1 times [2021-10-13 19:11:46,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:46,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998377213] [2021-10-13 19:11:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:46,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:46,183 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 19:11:46,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:46,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998377213] [2021-10-13 19:11:46,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998377213] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:11:46,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:11:46,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 19:11:46,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353068127] [2021-10-13 19:11:46,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 19:11:46,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:46,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 19:11:46,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:11:46,189 INFO L87 Difference]: Start difference. First operand 12038 states and 52473 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 19:11:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:46,494 INFO L93 Difference]: Finished difference Result 15598 states and 66036 transitions. [2021-10-13 19:11:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 19:11:46,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 19:11:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:46,603 INFO L225 Difference]: With dead ends: 15598 [2021-10-13 19:11:46,603 INFO L226 Difference]: Without dead ends: 15598 [2021-10-13 19:11:46,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 19:11:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15598 states. [2021-10-13 19:11:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15598 to 12036. [2021-10-13 19:11:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12036 states, 11912 states have (on average 4.41714237743452) internal successors, (52617), 12035 states have internal predecessors, (52617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12036 states to 12036 states and 52617 transitions. [2021-10-13 19:11:47,386 INFO L78 Accepts]: Start accepts. Automaton has 12036 states and 52617 transitions. Word has length 10 [2021-10-13 19:11:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:47,386 INFO L470 AbstractCegarLoop]: Abstraction has 12036 states and 52617 transitions. [2021-10-13 19:11:47,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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 19:11:47,387 INFO L276 IsEmpty]: Start isEmpty. Operand 12036 states and 52617 transitions. [2021-10-13 19:11:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:11:47,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:47,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:11:47,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 19:11:47,389 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:47,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:47,389 INFO L82 PathProgramCache]: Analyzing trace with hash 262478411, now seen corresponding path program 1 times [2021-10-13 19:11:47,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:47,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452760244] [2021-10-13 19:11:47,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:47,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:47,428 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 19:11:47,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:47,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452760244] [2021-10-13 19:11:47,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452760244] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:11:47,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:11:47,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 19:11:47,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839169254] [2021-10-13 19:11:47,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 19:11:47,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:47,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 19:11:47,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:11:47,431 INFO L87 Difference]: Start difference. First operand 12036 states and 52617 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 19:11:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:47,917 INFO L93 Difference]: Finished difference Result 20432 states and 83619 transitions. [2021-10-13 19:11:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:11:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 19:11:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:48,059 INFO L225 Difference]: With dead ends: 20432 [2021-10-13 19:11:48,059 INFO L226 Difference]: Without dead ends: 20432 [2021-10-13 19:11:48,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:11:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20432 states. [2021-10-13 19:11:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20432 to 16314. [2021-10-13 19:11:48,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16314 states, 16190 states have (on average 4.392958616429895) internal successors, (71122), 16313 states have internal predecessors, (71122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16314 states to 16314 states and 71122 transitions. [2021-10-13 19:11:48,942 INFO L78 Accepts]: Start accepts. Automaton has 16314 states and 71122 transitions. Word has length 10 [2021-10-13 19:11:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:48,943 INFO L470 AbstractCegarLoop]: Abstraction has 16314 states and 71122 transitions. [2021-10-13 19:11:48,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 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 19:11:48,943 INFO L276 IsEmpty]: Start isEmpty. Operand 16314 states and 71122 transitions. [2021-10-13 19:11:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 19:11:48,945 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:48,945 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:11:48,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 19:11:48,945 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:48,946 INFO L82 PathProgramCache]: Analyzing trace with hash 322723989, now seen corresponding path program 2 times [2021-10-13 19:11:48,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:48,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808607983] [2021-10-13 19:11:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:48,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:11:49,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:49,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808607983] [2021-10-13 19:11:49,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808607983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:49,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698130364] [2021-10-13 19:11:49,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:11:49,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:49,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:49,036 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 19:11:49,061 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 19:11:49,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:11:49,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:11:49,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:11:49,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:11:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:11:49,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698130364] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:49,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:11:49,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-10-13 19:11:49,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221193979] [2021-10-13 19:11:49,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:11:49,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:49,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:11:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:11:49,638 INFO L87 Difference]: Start difference. First operand 16314 states and 71122 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:50,469 INFO L93 Difference]: Finished difference Result 34370 states and 141660 transitions. [2021-10-13 19:11:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:11:50,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 19:11:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:50,955 INFO L225 Difference]: With dead ends: 34370 [2021-10-13 19:11:50,956 INFO L226 Difference]: Without dead ends: 34370 [2021-10-13 19:11:50,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:11:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34370 states. [2021-10-13 19:11:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34370 to 19950. [2021-10-13 19:11:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19950 states, 19826 states have (on average 4.509280742459397) internal successors, (89401), 19949 states have internal predecessors, (89401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19950 states to 19950 states and 89401 transitions. [2021-10-13 19:11:51,924 INFO L78 Accepts]: Start accepts. Automaton has 19950 states and 89401 transitions. Word has length 10 [2021-10-13 19:11:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:51,924 INFO L470 AbstractCegarLoop]: Abstraction has 19950 states and 89401 transitions. [2021-10-13 19:11:51,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 19950 states and 89401 transitions. [2021-10-13 19:11:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 19:11:51,926 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:51,926 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:11:51,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-13 19:11:52,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:52,130 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:52,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:52,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1346542294, now seen corresponding path program 3 times [2021-10-13 19:11:52,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:52,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482873609] [2021-10-13 19:11:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:52,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:11:52,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:52,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482873609] [2021-10-13 19:11:52,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482873609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:52,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845172710] [2021-10-13 19:11:52,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:11:52,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:52,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:52,288 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 19:11:52,288 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 19:11:52,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:11:52,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:11:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 19:11:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:11:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:11:53,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845172710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:53,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:11:53,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-13 19:11:53,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383209223] [2021-10-13 19:11:53,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 19:11:53,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 19:11:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:11:53,427 INFO L87 Difference]: Start difference. First operand 19950 states and 89401 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 19:11:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:11:54,640 INFO L93 Difference]: Finished difference Result 40126 states and 174241 transitions. [2021-10-13 19:11:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 19:11:54,641 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 19:11:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:11:54,947 INFO L225 Difference]: With dead ends: 40126 [2021-10-13 19:11:54,947 INFO L226 Difference]: Without dead ends: 40126 [2021-10-13 19:11:54,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-10-13 19:11:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40126 states. [2021-10-13 19:11:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40126 to 27674. [2021-10-13 19:11:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27674 states, 27550 states have (on average 4.623557168784029) internal successors, (127379), 27673 states have internal predecessors, (127379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:11:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27674 states to 27674 states and 127379 transitions. [2021-10-13 19:11:56,603 INFO L78 Accepts]: Start accepts. Automaton has 27674 states and 127379 transitions. Word has length 11 [2021-10-13 19:11:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:11:56,604 INFO L470 AbstractCegarLoop]: Abstraction has 27674 states and 127379 transitions. [2021-10-13 19:11:56,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 19:11:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 27674 states and 127379 transitions. [2021-10-13 19:11:56,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 19:11:56,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:11:56,605 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:11:56,640 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 19:11:56,813 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,SelfDestructingSolverStorable12 [2021-10-13 19:11:56,813 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:11:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:11:56,815 INFO L82 PathProgramCache]: Analyzing trace with hash -453070358, now seen corresponding path program 4 times [2021-10-13 19:11:56,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:11:56,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690742499] [2021-10-13 19:11:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:11:56,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:11:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:11:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:11:56,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:11:56,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690742499] [2021-10-13 19:11:56,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690742499] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:56,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193294759] [2021-10-13 19:11:56,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:11:56,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:11:56,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:11:56,942 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 19:11:56,966 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 19:11:57,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:11:57,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:11:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 19:11:57,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:11:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:11:58,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193294759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:11:58,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:11:58,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-13 19:11:58,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631710982] [2021-10-13 19:11:58,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 19:11:58,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:11:58,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 19:11:58,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:11:58,272 INFO L87 Difference]: Start difference. First operand 27674 states and 127379 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 19:12:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:12:00,337 INFO L93 Difference]: Finished difference Result 50334 states and 217332 transitions. [2021-10-13 19:12:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:12:00,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 19:12:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:12:01,029 INFO L225 Difference]: With dead ends: 50334 [2021-10-13 19:12:01,029 INFO L226 Difference]: Without dead ends: 50330 [2021-10-13 19:12:01,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 482.0ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:12:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50330 states. [2021-10-13 19:12:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50330 to 36126. [2021-10-13 19:12:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36126 states, 36002 states have (on average 4.6749625020832175) internal successors, (168308), 36125 states have internal predecessors, (168308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:12:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36126 states to 36126 states and 168308 transitions. [2021-10-13 19:12:03,392 INFO L78 Accepts]: Start accepts. Automaton has 36126 states and 168308 transitions. Word has length 11 [2021-10-13 19:12:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:12:03,393 INFO L470 AbstractCegarLoop]: Abstraction has 36126 states and 168308 transitions. [2021-10-13 19:12:03,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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 19:12:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 36126 states and 168308 transitions. [2021-10-13 19:12:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 19:12:03,395 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:12:03,395 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:12:03,434 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 19:12:03,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:03,609 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:12:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:12:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash -453071366, now seen corresponding path program 2 times [2021-10-13 19:12:03,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:12:03,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985686418] [2021-10-13 19:12:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:12:03,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:12:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:12:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:03,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:12:03,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985686418] [2021-10-13 19:12:03,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985686418] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:03,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677765224] [2021-10-13 19:12:03,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:12:03,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:03,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:12:03,726 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 19:12:03,729 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 19:12:03,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:12:03,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:12:03,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 19:12:03,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:12:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:04,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677765224] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:04,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:12:04,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 10 [2021-10-13 19:12:04,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346155245] [2021-10-13 19:12:04,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 19:12:04,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:12:04,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 19:12:04,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:12:04,221 INFO L87 Difference]: Start difference. First operand 36126 states and 168308 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 19:12:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:12:05,961 INFO L93 Difference]: Finished difference Result 49110 states and 218535 transitions. [2021-10-13 19:12:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 19:12:05,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 19:12:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:12:06,301 INFO L225 Difference]: With dead ends: 49110 [2021-10-13 19:12:06,302 INFO L226 Difference]: Without dead ends: 49102 [2021-10-13 19:12:06,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:12:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49102 states. [2021-10-13 19:12:08,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49102 to 40836. [2021-10-13 19:12:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40836 states, 40712 states have (on average 4.641923757123207) internal successors, (188982), 40835 states have internal predecessors, (188982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:12:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40836 states to 40836 states and 188982 transitions. [2021-10-13 19:12:08,357 INFO L78 Accepts]: Start accepts. Automaton has 40836 states and 188982 transitions. Word has length 11 [2021-10-13 19:12:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:12:08,358 INFO L470 AbstractCegarLoop]: Abstraction has 40836 states and 188982 transitions. [2021-10-13 19:12:08,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 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 19:12:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 40836 states and 188982 transitions. [2021-10-13 19:12:08,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:12:08,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:12:08,361 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:12:08,386 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 19:12:08,561 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,SelfDestructingSolverStorable14 [2021-10-13 19:12:08,562 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:12:08,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:12:08,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1933370579, now seen corresponding path program 5 times [2021-10-13 19:12:08,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:12:08,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398658118] [2021-10-13 19:12:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:12:08,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:12:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:12:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:09,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:12:09,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398658118] [2021-10-13 19:12:09,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398658118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:09,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125892962] [2021-10-13 19:12:09,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:12:09,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:09,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:12:09,305 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 19:12:09,351 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 19:12:09,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 19:12:09,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:12:09,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 19:12:09,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:12:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:10,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125892962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:10,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:12:10,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2021-10-13 19:12:10,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055554610] [2021-10-13 19:12:10,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 19:12:10,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:12:10,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 19:12:10,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-13 19:12:10,291 INFO L87 Difference]: Start difference. First operand 40836 states and 188982 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 19:12:12,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:12:12,551 INFO L93 Difference]: Finished difference Result 75042 states and 331059 transitions. [2021-10-13 19:12:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 19:12:12,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 19:12:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:12:13,469 INFO L225 Difference]: With dead ends: 75042 [2021-10-13 19:12:13,469 INFO L226 Difference]: Without dead ends: 75024 [2021-10-13 19:12:13,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-10-13 19:12:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75024 states. [2021-10-13 19:12:15,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75024 to 47100. [2021-10-13 19:12:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47100 states, 46976 states have (on average 4.732565565395095) internal successors, (222317), 47099 states have internal predecessors, (222317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:12:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47100 states to 47100 states and 222317 transitions. [2021-10-13 19:12:15,977 INFO L78 Accepts]: Start accepts. Automaton has 47100 states and 222317 transitions. Word has length 12 [2021-10-13 19:12:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:12:15,978 INFO L470 AbstractCegarLoop]: Abstraction has 47100 states and 222317 transitions. [2021-10-13 19:12:15,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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 19:12:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 47100 states and 222317 transitions. [2021-10-13 19:12:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 19:12:15,982 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:12:15,982 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:12:16,009 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 19:12:16,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:16,183 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:12:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:12:16,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1933369571, now seen corresponding path program 3 times [2021-10-13 19:12:16,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:12:16,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355976963] [2021-10-13 19:12:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:12:16,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:12:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:12:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:16,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:12:16,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355976963] [2021-10-13 19:12:16,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355976963] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:16,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883217708] [2021-10-13 19:12:16,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:12:16,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:12:16,967 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 19:12:17,009 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 19:12:17,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 19:12:17,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:12:17,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 19:12:17,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:12:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:17,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883217708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:17,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:12:17,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2021-10-13 19:12:17,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193123107] [2021-10-13 19:12:17,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 19:12:17,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:12:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 19:12:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-10-13 19:12:17,883 INFO L87 Difference]: Start difference. First operand 47100 states and 222317 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 19:12:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:12:21,785 INFO L93 Difference]: Finished difference Result 103340 states and 452367 transitions. [2021-10-13 19:12:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 19:12:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 19:12:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:12:22,750 INFO L225 Difference]: With dead ends: 103340 [2021-10-13 19:12:22,751 INFO L226 Difference]: Without dead ends: 103272 [2021-10-13 19:12:22,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-10-13 19:12:22,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103272 states. [2021-10-13 19:12:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103272 to 61784. [2021-10-13 19:12:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61784 states, 61660 states have (on average 4.704313979889718) internal successors, (290068), 61783 states have internal predecessors, (290068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:12:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61784 states to 61784 states and 290068 transitions. [2021-10-13 19:12:28,053 INFO L78 Accepts]: Start accepts. Automaton has 61784 states and 290068 transitions. Word has length 12 [2021-10-13 19:12:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:12:28,053 INFO L470 AbstractCegarLoop]: Abstraction has 61784 states and 290068 transitions. [2021-10-13 19:12:28,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 19:12:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 61784 states and 290068 transitions. [2021-10-13 19:12:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 19:12:28,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:12:28,059 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:12:28,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 19:12:28,272 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,SelfDestructingSolverStorable16 [2021-10-13 19:12:28,273 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:12:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:12:28,274 INFO L82 PathProgramCache]: Analyzing trace with hash 625665072, now seen corresponding path program 6 times [2021-10-13 19:12:28,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:12:28,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178082133] [2021-10-13 19:12:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:12:28,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:12:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:12:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:28,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:12:28,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178082133] [2021-10-13 19:12:28,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178082133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:28,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044363011] [2021-10-13 19:12:28,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 19:12:28,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:28,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:12:28,457 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 19:12:28,465 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 19:12:28,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-13 19:12:28,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:12:28,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 19:12:28,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:12:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 19:12:28,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044363011] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:12:28,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:12:28,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2021-10-13 19:12:28,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325368858] [2021-10-13 19:12:28,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 19:12:28,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:12:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 19:12:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:12:28,768 INFO L87 Difference]: Start difference. First operand 61784 states and 290068 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 19:12:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:12:30,142 INFO L93 Difference]: Finished difference Result 61480 states and 280401 transitions. [2021-10-13 19:12:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 19:12:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 13 [2021-10-13 19:12:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:12:30,615 INFO L225 Difference]: With dead ends: 61480 [2021-10-13 19:12:30,615 INFO L226 Difference]: Without dead ends: 61312 [2021-10-13 19:12:30,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:12:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61312 states. [2021-10-13 19:12:32,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61312 to 51038. [2021-10-13 19:12:32,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51038 states, 50914 states have (on average 4.59942255568213) internal successors, (234175), 51037 states have internal predecessors, (234175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:12:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51038 states to 51038 states and 234175 transitions. [2021-10-13 19:12:33,132 INFO L78 Accepts]: Start accepts. Automaton has 51038 states and 234175 transitions. Word has length 13 [2021-10-13 19:12:33,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:12:33,133 INFO L470 AbstractCegarLoop]: Abstraction has 51038 states and 234175 transitions. [2021-10-13 19:12:33,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 19:12:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 51038 states and 234175 transitions. [2021-10-13 19:12:33,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 19:12:33,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:12:33,140 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:12:33,179 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 19:12:33,355 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,SelfDestructingSolverStorable17 [2021-10-13 19:12:33,356 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:12:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:12:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash -267144052, now seen corresponding path program 1 times [2021-10-13 19:12:33,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:12:33,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161188606] [2021-10-13 19:12:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:12:33,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:12:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:12:33,401 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 19:12:33,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:12:33,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161188606] [2021-10-13 19:12:33,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161188606] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:33,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142747726] [2021-10-13 19:12:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:12:33,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:33,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:12:33,404 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 19:12:33,987 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 19:12:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:12:34,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 19:12:34,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:12:34,427 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 19:12:34,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142747726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:34,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:12:34,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-10-13 19:12:34,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424353917] [2021-10-13 19:12:34,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 19:12:34,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:12:34,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 19:12:34,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-10-13 19:12:34,429 INFO L87 Difference]: Start difference. First operand 51038 states and 234175 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 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 19:12:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:12:36,568 INFO L93 Difference]: Finished difference Result 84886 states and 378990 transitions. [2021-10-13 19:12:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 19:12:36,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 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 14 [2021-10-13 19:12:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:12:37,233 INFO L225 Difference]: With dead ends: 84886 [2021-10-13 19:12:37,233 INFO L226 Difference]: Without dead ends: 84792 [2021-10-13 19:12:37,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:12:37,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84792 states. [2021-10-13 19:12:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84792 to 63468. [2021-10-13 19:12:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63468 states, 63344 states have (on average 4.721299570598636) internal successors, (299066), 63467 states have internal predecessors, (299066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:12:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63468 states to 63468 states and 299066 transitions. [2021-10-13 19:12:41,471 INFO L78 Accepts]: Start accepts. Automaton has 63468 states and 299066 transitions. Word has length 14 [2021-10-13 19:12:41,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:12:41,472 INFO L470 AbstractCegarLoop]: Abstraction has 63468 states and 299066 transitions. [2021-10-13 19:12:41,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 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 19:12:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 63468 states and 299066 transitions. [2021-10-13 19:12:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 19:12:41,479 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:12:41,479 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:12:41,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-13 19:12:41,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:41,685 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:12:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:12:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1784583013, now seen corresponding path program 4 times [2021-10-13 19:12:41,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:12:41,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221458540] [2021-10-13 19:12:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:12:41,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:12:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:12:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:41,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:12:41,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221458540] [2021-10-13 19:12:41,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221458540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:41,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259758017] [2021-10-13 19:12:41,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:12:41,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:41,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:12:41,838 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 19:12:41,862 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 19:12:42,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:12:42,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:12:42,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 19:12:42,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:12:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 19:12:43,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259758017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:43,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:12:43,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-13 19:12:43,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174131523] [2021-10-13 19:12:43,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 19:12:43,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:12:43,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 19:12:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-10-13 19:12:43,604 INFO L87 Difference]: Start difference. First operand 63468 states and 299066 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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 19:12:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:12:46,573 INFO L93 Difference]: Finished difference Result 108214 states and 481870 transitions. [2021-10-13 19:12:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 19:12:46,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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 19:12:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:12:47,554 INFO L225 Difference]: With dead ends: 108214 [2021-10-13 19:12:47,554 INFO L226 Difference]: Without dead ends: 108068 [2021-10-13 19:12:47,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2021-10-13 19:12:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108068 states. [2021-10-13 19:12:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108068 to 75548. [2021-10-13 19:12:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75548 states, 75424 states have (on average 4.720394039032668) internal successors, (356031), 75547 states have internal predecessors, (356031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:12:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75548 states to 75548 states and 356031 transitions. [2021-10-13 19:12:52,448 INFO L78 Accepts]: Start accepts. Automaton has 75548 states and 356031 transitions. Word has length 14 [2021-10-13 19:12:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:12:52,449 INFO L470 AbstractCegarLoop]: Abstraction has 75548 states and 356031 transitions. [2021-10-13 19:12:52,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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 19:12:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 75548 states and 356031 transitions. [2021-10-13 19:12:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:12:52,457 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:12:52,457 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:12:52,490 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 19:12:52,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:52,673 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:12:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:12:52,674 INFO L82 PathProgramCache]: Analyzing trace with hash -789107435, now seen corresponding path program 2 times [2021-10-13 19:12:52,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:12:52,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476959048] [2021-10-13 19:12:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:12:52,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:12:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:12:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:52,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:12:52,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476959048] [2021-10-13 19:12:52,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476959048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:52,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087041775] [2021-10-13 19:12:52,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:12:52,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:12:52,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:12:52,974 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 19:12:52,996 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 19:12:53,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:12:53,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:12:53,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 19:12:53,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:12:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:12:55,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087041775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:12:55,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:12:55,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2021-10-13 19:12:55,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912214515] [2021-10-13 19:12:55,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 19:12:55,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:12:55,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 19:12:55,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:12:55,081 INFO L87 Difference]: Start difference. First operand 75548 states and 356031 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 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 19:13:00,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:13:00,478 INFO L93 Difference]: Finished difference Result 162506 states and 747152 transitions. [2021-10-13 19:13:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 19:13:00,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 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 19:13:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:13:03,138 INFO L225 Difference]: With dead ends: 162506 [2021-10-13 19:13:03,139 INFO L226 Difference]: Without dead ends: 162478 [2021-10-13 19:13:03,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-10-13 19:13:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162478 states. [2021-10-13 19:13:08,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162478 to 104434. [2021-10-13 19:13:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104434 states, 104305 states have (on average 4.867724461914578) internal successors, (507728), 104433 states have internal predecessors, (507728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:13:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104434 states to 104434 states and 507728 transitions. [2021-10-13 19:13:10,062 INFO L78 Accepts]: Start accepts. Automaton has 104434 states and 507728 transitions. Word has length 15 [2021-10-13 19:13:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:13:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 104434 states and 507728 transitions. [2021-10-13 19:13:10,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 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 19:13:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 104434 states and 507728 transitions. [2021-10-13 19:13:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:13:10,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:13:10,071 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:13:10,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-13 19:13:10,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-13 19:13:10,284 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:13:10,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:13:10,287 INFO L82 PathProgramCache]: Analyzing trace with hash -32237175, now seen corresponding path program 1 times [2021-10-13 19:13:10,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:13:10,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150029048] [2021-10-13 19:13:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:13:10,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:13:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:13:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:13:11,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:13:11,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150029048] [2021-10-13 19:13:11,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150029048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:13:11,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470657993] [2021-10-13 19:13:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:13:11,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:13:11,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:13:11,135 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 19:13:11,152 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 19:13:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:13:11,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 19:13:11,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:13:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:13:12,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470657993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:13:12,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:13:12,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2021-10-13 19:13:12,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101466379] [2021-10-13 19:13:12,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 19:13:12,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:13:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 19:13:12,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-13 19:13:12,569 INFO L87 Difference]: Start difference. First operand 104434 states and 507728 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 19:13:28,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:13:28,599 INFO L93 Difference]: Finished difference Result 384008 states and 1707497 transitions. [2021-10-13 19:13:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-10-13 19:13:28,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 19:13:28,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:13:33,641 INFO L225 Difference]: With dead ends: 384008 [2021-10-13 19:13:33,642 INFO L226 Difference]: Without dead ends: 383686 [2021-10-13 19:13:33,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 5669.1ms TimeCoverageRelationStatistics Valid=1161, Invalid=6321, Unknown=0, NotChecked=0, Total=7482 [2021-10-13 19:13:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383686 states. [2021-10-13 19:13:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383686 to 245282. [2021-10-13 19:13:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245282 states, 245153 states have (on average 4.890917100749328) internal successors, (1199023), 245281 states have internal predecessors, (1199023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:13:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245282 states to 245282 states and 1199023 transitions. [2021-10-13 19:13:58,082 INFO L78 Accepts]: Start accepts. Automaton has 245282 states and 1199023 transitions. Word has length 15 [2021-10-13 19:13:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:13:58,082 INFO L470 AbstractCegarLoop]: Abstraction has 245282 states and 1199023 transitions. [2021-10-13 19:13:58,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 19:13:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 245282 states and 1199023 transitions. [2021-10-13 19:13:58,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:13:58,094 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:13:58,095 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:13:58,131 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 19:13:58,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:13:58,309 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:13:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:13:58,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1931853929, now seen corresponding path program 3 times [2021-10-13 19:13:58,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:13:58,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785160233] [2021-10-13 19:13:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:13:58,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:13:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:13:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:13:58,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:13:58,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785160233] [2021-10-13 19:13:58,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785160233] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:13:58,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016798477] [2021-10-13 19:13:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:13:58,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:13:58,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:13:58,547 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 19:13:58,551 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 19:13:58,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:13:58,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:13:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:13:58,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:13:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 19:13:59,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016798477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:13:59,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:13:59,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2021-10-13 19:13:59,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742222609] [2021-10-13 19:13:59,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 19:13:59,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:13:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 19:13:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:13:59,236 INFO L87 Difference]: Start difference. First operand 245282 states and 1199023 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:14:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:14:04,847 INFO L93 Difference]: Finished difference Result 145314 states and 600518 transitions. [2021-10-13 19:14:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-13 19:14:04,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 19:14:04,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:14:06,744 INFO L225 Difference]: With dead ends: 145314 [2021-10-13 19:14:06,744 INFO L226 Difference]: Without dead ends: 144252 [2021-10-13 19:14:06,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1852.7ms TimeCoverageRelationStatistics Valid=553, Invalid=2639, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 19:14:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144252 states. [2021-10-13 19:14:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144252 to 92138. [2021-10-13 19:14:11,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92138 states, 92010 states have (on average 4.444592979024019) internal successors, (408947), 92137 states have internal predecessors, (408947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:14:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92138 states to 92138 states and 408947 transitions. [2021-10-13 19:14:13,143 INFO L78 Accepts]: Start accepts. Automaton has 92138 states and 408947 transitions. Word has length 15 [2021-10-13 19:14:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:14:13,143 INFO L470 AbstractCegarLoop]: Abstraction has 92138 states and 408947 transitions. [2021-10-13 19:14:13,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:14:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 92138 states and 408947 transitions. [2021-10-13 19:14:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:14:13,153 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:14:13,153 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:14:13,183 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 19:14:13,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:14:13,362 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:14:13,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:14:13,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1933652194, now seen corresponding path program 1 times [2021-10-13 19:14:13,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:14:13,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384207001] [2021-10-13 19:14:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:14:13,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:14:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:14:13,485 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 19:14:13,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:14:13,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384207001] [2021-10-13 19:14:13,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384207001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:14:13,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538866211] [2021-10-13 19:14:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:14:13,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:14:13,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:14:13,494 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 19:14:13,511 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 19:14:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:14:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 19:14:13,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:14:14,262 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 19:14:14,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538866211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:14:14,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:14:14,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-13 19:14:14,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282015961] [2021-10-13 19:14:14,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 19:14:14,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:14:14,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 19:14:14,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:14:14,266 INFO L87 Difference]: Start difference. First operand 92138 states and 408947 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 19:14:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:14:18,310 INFO L93 Difference]: Finished difference Result 145730 states and 629634 transitions. [2021-10-13 19:14:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 19:14:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 19:14:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:14:20,382 INFO L225 Difference]: With dead ends: 145730 [2021-10-13 19:14:20,382 INFO L226 Difference]: Without dead ends: 145554 [2021-10-13 19:14:20,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-10-13 19:14:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145554 states. [2021-10-13 19:14:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145554 to 114412. [2021-10-13 19:14:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114412 states, 114284 states have (on average 4.530231703475552) internal successors, (517733), 114411 states have internal predecessors, (517733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:14:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114412 states to 114412 states and 517733 transitions. [2021-10-13 19:14:27,834 INFO L78 Accepts]: Start accepts. Automaton has 114412 states and 517733 transitions. Word has length 15 [2021-10-13 19:14:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:14:27,835 INFO L470 AbstractCegarLoop]: Abstraction has 114412 states and 517733 transitions. [2021-10-13 19:14:27,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 19:14:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 114412 states and 517733 transitions. [2021-10-13 19:14:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:14:27,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:14:27,843 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:14:27,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 19:14:28,056 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,SelfDestructingSolverStorable23 [2021-10-13 19:14:28,057 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:14:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:14:28,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1987599634, now seen corresponding path program 2 times [2021-10-13 19:14:28,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:14:28,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903023715] [2021-10-13 19:14:28,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:14:28,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:14:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:14:28,116 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 19:14:28,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:14:28,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903023715] [2021-10-13 19:14:28,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903023715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:14:28,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323781106] [2021-10-13 19:14:28,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:14:28,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:14:28,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:14:28,119 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 19:14:28,121 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 19:14:28,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:14:28,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:14:28,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 19:14:28,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:14:28,915 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 19:14:28,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323781106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:14:28,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:14:28,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-13 19:14:28,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417049342] [2021-10-13 19:14:28,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 19:14:28,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:14:28,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 19:14:28,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:14:28,918 INFO L87 Difference]: Start difference. First operand 114412 states and 517733 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 19:14:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:14:32,804 INFO L93 Difference]: Finished difference Result 186558 states and 808764 transitions. [2021-10-13 19:14:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 19:14:32,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 19:14:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:14:35,209 INFO L225 Difference]: With dead ends: 186558 [2021-10-13 19:14:35,209 INFO L226 Difference]: Without dead ends: 185978 [2021-10-13 19:14:35,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:14:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185978 states. [2021-10-13 19:14:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185978 to 128134. [2021-10-13 19:14:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128134 states, 128014 states have (on average 4.517498086146828) internal successors, (578303), 128133 states have internal predecessors, (578303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:14:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128134 states to 128134 states and 578303 transitions. [2021-10-13 19:14:44,295 INFO L78 Accepts]: Start accepts. Automaton has 128134 states and 578303 transitions. Word has length 15 [2021-10-13 19:14:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:14:44,295 INFO L470 AbstractCegarLoop]: Abstraction has 128134 states and 578303 transitions. [2021-10-13 19:14:44,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 19:14:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 128134 states and 578303 transitions. [2021-10-13 19:14:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:14:44,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:14:44,306 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:14:44,344 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 19:14:44,519 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,SelfDestructingSolverStorable24 [2021-10-13 19:14:44,520 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:14:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:14:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1241964716, now seen corresponding path program 3 times [2021-10-13 19:14:44,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:14:44,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244283819] [2021-10-13 19:14:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:14:44,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:14:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:14:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:14:44,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:14:44,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244283819] [2021-10-13 19:14:44,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244283819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:14:44,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944904300] [2021-10-13 19:14:44,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:14:44,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:14:44,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:14:44,581 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 19:14:44,584 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 19:14:45,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 19:14:45,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:14:45,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:14:45,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:14:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:14:45,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944904300] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:14:45,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 19:14:45,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 6 [2021-10-13 19:14:45,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921268702] [2021-10-13 19:14:45,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 19:14:45,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:14:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 19:14:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:14:45,191 INFO L87 Difference]: Start difference. First operand 128134 states and 578303 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:14:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:14:48,910 INFO L93 Difference]: Finished difference Result 204296 states and 883231 transitions. [2021-10-13 19:14:48,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 19:14:48,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 19:14:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:14:51,404 INFO L225 Difference]: With dead ends: 204296 [2021-10-13 19:14:51,404 INFO L226 Difference]: Without dead ends: 203784 [2021-10-13 19:14:51,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-10-13 19:14:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203784 states. [2021-10-13 19:14:59,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203784 to 149932. [2021-10-13 19:14:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149932 states, 149815 states have (on average 4.431652371257885) internal successors, (663928), 149931 states have internal predecessors, (663928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:15:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149932 states to 149932 states and 663928 transitions. [2021-10-13 19:15:01,554 INFO L78 Accepts]: Start accepts. Automaton has 149932 states and 663928 transitions. Word has length 15 [2021-10-13 19:15:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:15:01,555 INFO L470 AbstractCegarLoop]: Abstraction has 149932 states and 663928 transitions. [2021-10-13 19:15:01,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:15:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 149932 states and 663928 transitions. [2021-10-13 19:15:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 19:15:01,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:15:01,566 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:15:01,604 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 19:15:01,775 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,SelfDestructingSolverStorable25 [2021-10-13 19:15:01,776 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:15:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:15:01,777 INFO L82 PathProgramCache]: Analyzing trace with hash -281844934, now seen corresponding path program 4 times [2021-10-13 19:15:01,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:15:01,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132530826] [2021-10-13 19:15:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:15:01,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:15:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:15:01,832 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 19:15:01,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:15:01,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132530826] [2021-10-13 19:15:01,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132530826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:15:01,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361447196] [2021-10-13 19:15:01,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 19:15:01,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:15:01,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:15:01,835 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 19:15:01,838 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 19:15:02,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 19:15:02,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:15:02,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 19:15:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:15:03,142 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 19:15:03,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361447196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:15:03,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:15:03,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-10-13 19:15:03,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795250497] [2021-10-13 19:15:03,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 19:15:03,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:15:03,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 19:15:03,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:15:03,144 INFO L87 Difference]: Start difference. First operand 149932 states and 663928 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 19:15:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:15:09,028 INFO L93 Difference]: Finished difference Result 285290 states and 1208248 transitions. [2021-10-13 19:15:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 19:15:09,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 19:15:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:15:14,755 INFO L225 Difference]: With dead ends: 285290 [2021-10-13 19:15:14,756 INFO L226 Difference]: Without dead ends: 284882 [2021-10-13 19:15:14,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-10-13 19:15:15,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284882 states. [2021-10-13 19:15:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284882 to 173494. [2021-10-13 19:15:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173494 states, 173378 states have (on average 4.407104707633033) internal successors, (764095), 173493 states have internal predecessors, (764095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:15:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173494 states to 173494 states and 764095 transitions. [2021-10-13 19:15:30,924 INFO L78 Accepts]: Start accepts. Automaton has 173494 states and 764095 transitions. Word has length 15 [2021-10-13 19:15:30,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:15:30,925 INFO L470 AbstractCegarLoop]: Abstraction has 173494 states and 764095 transitions. [2021-10-13 19:15:30,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 19:15:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 173494 states and 764095 transitions. [2021-10-13 19:15:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:15:30,937 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:15:30,938 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:15:30,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-13 19:15:31,152 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,SelfDestructingSolverStorable26 [2021-10-13 19:15:31,153 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:15:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:15:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash -83124476, now seen corresponding path program 1 times [2021-10-13 19:15:31,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:15:31,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093410886] [2021-10-13 19:15:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:15:31,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:15:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:15:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:15:31,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:15:31,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093410886] [2021-10-13 19:15:31,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093410886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:15:31,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070330827] [2021-10-13 19:15:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:15:31,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:15:31,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:15:31,351 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 19:15:31,355 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 19:15:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:15:31,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 19:15:31,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:15:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:15:33,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070330827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:15:33,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:15:33,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-13 19:15:33,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054686964] [2021-10-13 19:15:33,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:15:33,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:15:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:15:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:15:33,405 INFO L87 Difference]: Start difference. First operand 173494 states and 764095 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:15:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:15:39,715 INFO L93 Difference]: Finished difference Result 264580 states and 1093174 transitions. [2021-10-13 19:15:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 19:15:39,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 19:15:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:15:42,753 INFO L225 Difference]: With dead ends: 264580 [2021-10-13 19:15:42,754 INFO L226 Difference]: Without dead ends: 264136 [2021-10-13 19:15:42,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=354, Invalid=836, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 19:15:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264136 states. [2021-10-13 19:15:52,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264136 to 147078. [2021-10-13 19:15:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147078 states, 146961 states have (on average 4.371112063744803) internal successors, (642383), 147077 states have internal predecessors, (642383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:15:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147078 states to 147078 states and 642383 transitions. [2021-10-13 19:15:54,739 INFO L78 Accepts]: Start accepts. Automaton has 147078 states and 642383 transitions. Word has length 16 [2021-10-13 19:15:54,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:15:54,742 INFO L470 AbstractCegarLoop]: Abstraction has 147078 states and 642383 transitions. [2021-10-13 19:15:54,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:15:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 147078 states and 642383 transitions. [2021-10-13 19:15:54,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:15:54,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:15:54,754 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:15:54,782 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 19:15:54,954 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,SelfDestructingSolverStorable27 [2021-10-13 19:15:54,955 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:15:54,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:15:54,956 INFO L82 PathProgramCache]: Analyzing trace with hash -999350900, now seen corresponding path program 2 times [2021-10-13 19:15:54,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:15:54,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750095220] [2021-10-13 19:15:54,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:15:54,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:15:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:15:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-13 19:15:55,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:15:55,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750095220] [2021-10-13 19:15:55,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750095220] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:15:55,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801206851] [2021-10-13 19:15:55,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 19:15:55,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:15:55,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:15:55,020 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 19:15:55,033 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 19:15:55,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 19:15:55,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:15:55,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 19:15:55,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:15:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 19:15:55,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801206851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:15:55,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:15:55,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-10-13 19:15:55,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675708479] [2021-10-13 19:15:55,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 19:15:55,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:15:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 19:15:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 19:15:55,720 INFO L87 Difference]: Start difference. First operand 147078 states and 642383 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:15:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:15:59,522 INFO L93 Difference]: Finished difference Result 202854 states and 856516 transitions. [2021-10-13 19:15:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 19:15:59,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 19:15:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:16:02,023 INFO L225 Difference]: With dead ends: 202854 [2021-10-13 19:16:02,024 INFO L226 Difference]: Without dead ends: 202848 [2021-10-13 19:16:02,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-10-13 19:16:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202848 states. [2021-10-13 19:16:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202848 to 152222. [2021-10-13 19:16:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152222 states, 152105 states have (on average 4.367331777390619) internal successors, (664293), 152221 states have internal predecessors, (664293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:16:13,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152222 states to 152222 states and 664293 transitions. [2021-10-13 19:16:13,005 INFO L78 Accepts]: Start accepts. Automaton has 152222 states and 664293 transitions. Word has length 16 [2021-10-13 19:16:13,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:16:13,005 INFO L470 AbstractCegarLoop]: Abstraction has 152222 states and 664293 transitions. [2021-10-13 19:16:13,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:16:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 152222 states and 664293 transitions. [2021-10-13 19:16:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 19:16:13,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:16:13,027 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:16:13,073 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 19:16:13,242 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,SelfDestructingSolverStorable28 [2021-10-13 19:16:13,242 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:16:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:16:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1949385890, now seen corresponding path program 3 times [2021-10-13 19:16:13,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:16:13,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109697793] [2021-10-13 19:16:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:16:13,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:16:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:16:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:16:13,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:16:13,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109697793] [2021-10-13 19:16:13,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109697793] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:16:13,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345628136] [2021-10-13 19:16:13,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 19:16:13,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:16:13,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:16:13,556 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 19:16:13,613 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 19:16:14,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-13 19:16:14,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:16:14,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 19:16:14,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:16:15,582 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 19:16:15,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345628136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:16:15,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:16:15,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-13 19:16:15,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961962321] [2021-10-13 19:16:15,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 19:16:15,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:16:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 19:16:15,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-10-13 19:16:15,587 INFO L87 Difference]: Start difference. First operand 152222 states and 664293 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:16:26,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:16:26,329 INFO L93 Difference]: Finished difference Result 383768 states and 1602951 transitions. [2021-10-13 19:16:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-13 19:16:26,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 19:16:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:16:31,141 INFO L225 Difference]: With dead ends: 383768 [2021-10-13 19:16:31,141 INFO L226 Difference]: Without dead ends: 383358 [2021-10-13 19:16:31,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1528.6ms TimeCoverageRelationStatistics Valid=796, Invalid=2174, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 19:16:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383358 states. [2021-10-13 19:16:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383358 to 228292. [2021-10-13 19:16:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228292 states, 228175 states have (on average 4.371819875095869) internal successors, (997540), 228291 states have internal predecessors, (997540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:16:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228292 states to 228292 states and 997540 transitions. [2021-10-13 19:16:53,589 INFO L78 Accepts]: Start accepts. Automaton has 228292 states and 997540 transitions. Word has length 16 [2021-10-13 19:16:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:16:53,590 INFO L470 AbstractCegarLoop]: Abstraction has 228292 states and 997540 transitions. [2021-10-13 19:16:53,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:16:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 228292 states and 997540 transitions. [2021-10-13 19:16:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:16:53,616 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:16:53,616 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:16:53,654 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 19:16:53,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:16:53,830 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:16:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:16:53,831 INFO L82 PathProgramCache]: Analyzing trace with hash 297458842, now seen corresponding path program 5 times [2021-10-13 19:16:53,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:16:53,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187788691] [2021-10-13 19:16:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:16:53,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:16:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:16:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:16:54,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:16:54,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187788691] [2021-10-13 19:16:54,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187788691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:16:54,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605149808] [2021-10-13 19:16:54,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 19:16:54,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:16:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-13 19:16:54,076 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 19:16:54,099 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 19:16:54,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-13 19:16:54,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 19:16:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 19:16:54,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 19:16:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 19:16:56,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605149808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 19:16:56,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 19:16:56,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-13 19:16:56,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531531749] [2021-10-13 19:16:56,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 19:16:56,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:16:56,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 19:16:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-10-13 19:16:56,296 INFO L87 Difference]: Start difference. First operand 228292 states and 997540 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 19:17:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:17:17,882 INFO L93 Difference]: Finished difference Result 603786 states and 2544934 transitions. [2021-10-13 19:17:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 19:17:17,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 19:17:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:17:28,515 INFO L225 Difference]: With dead ends: 603786 [2021-10-13 19:17:28,516 INFO L226 Difference]: Without dead ends: 603444 [2021-10-13 19:17:28,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1317.1ms TimeCoverageRelationStatistics Valid=496, Invalid=910, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 19:17:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603444 states. [2021-10-13 19:18:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603444 to 393308. [2021-10-13 19:18:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393308 states, 393191 states have (on average 4.41460511557996) internal successors, (1735783), 393307 states have internal predecessors, (1735783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:18:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393308 states to 393308 states and 1735783 transitions. [2021-10-13 19:18:11,997 INFO L78 Accepts]: Start accepts. Automaton has 393308 states and 1735783 transitions. Word has length 17 [2021-10-13 19:18:11,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 19:18:11,998 INFO L470 AbstractCegarLoop]: Abstraction has 393308 states and 1735783 transitions. [2021-10-13 19:18:11,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 19:18:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 393308 states and 1735783 transitions. [2021-10-13 19:18:12,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 19:18:12,049 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 19:18:12,049 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 19:18:12,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 19:18:12,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 19:18:12,266 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 24 more)] === [2021-10-13 19:18:12,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 19:18:12,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1821204291, now seen corresponding path program 1 times [2021-10-13 19:18:12,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 19:18:12,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805389315] [2021-10-13 19:18:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 19:18:12,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 19:18:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 19:18:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 19:18:12,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 19:18:12,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805389315] [2021-10-13 19:18:12,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805389315] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 19:18:12,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 19:18:12,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 19:18:12,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417179557] [2021-10-13 19:18:12,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 19:18:12,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 19:18:12,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 19:18:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:18:12,388 INFO L87 Difference]: Start difference. First operand 393308 states and 1735783 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 19:18:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 19:18:27,440 INFO L93 Difference]: Finished difference Result 432112 states and 1882225 transitions. [2021-10-13 19:18:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 19:18:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 19:18:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 19:18:36,782 INFO L225 Difference]: With dead ends: 432112 [2021-10-13 19:18:36,782 INFO L226 Difference]: Without dead ends: 432044 [2021-10-13 19:18:36,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 19:18:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432044 states.