/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.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 15:51:40,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 15:51:40,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 15:51:40,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-08 15:51:40,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 15:51:40,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 15:51:40,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 15:51:40,768 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-10-08 15:51:40,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 15:51:40,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 15:51:40,822 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 15:51:40,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 15:51:40,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 15:51:40,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 15:51:40,826 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 15:51:40,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 15:51:40,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 15:51:40,827 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 15:51:40,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 15:51:40,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 15:51:40,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 15:51:40,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-08 15:51:40,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 15:51:40,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-08 15:51:40,830 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-08 15:51:40,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 15:51:40,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-08 15:51:40,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 15:51:40,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-08 15:51:40,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 15:51:40,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 15:51:40,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 15:51:40,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 15:51:40,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 15:51:40,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 15:51:40,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-08 15:51:40,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-08 15:51:40,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-08 15:51:40,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-08 15:51:40,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 15:51:40,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 15:51:41,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 15:51:41,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 15:51:41,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 15:51:41,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 15:51:41,298 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 15:51:41,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2021-10-08 15:51:41,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99d3f95e0/1ae40fe660cb4a56abfbc978a47649a6/FLAGf22324d1c [2021-10-08 15:51:42,070 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 15:51:42,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-3.wvr.c [2021-10-08 15:51:42,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99d3f95e0/1ae40fe660cb4a56abfbc978a47649a6/FLAGf22324d1c [2021-10-08 15:51:42,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/99d3f95e0/1ae40fe660cb4a56abfbc978a47649a6 [2021-10-08 15:51:42,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 15:51:42,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-08 15:51:42,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 15:51:42,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 15:51:42,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 15:51:42,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f7a432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42, skipping insertion in model container [2021-10-08 15:51:42,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 15:51:42,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 15:51:42,643 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.wvr.c[2273,2286] [2021-10-08 15:51:42,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 15:51:42,655 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 15:51:42,679 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.wvr.c[2273,2286] [2021-10-08 15:51:42,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 15:51:42,702 INFO L208 MainTranslator]: Completed translation [2021-10-08 15:51:42,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42 WrapperNode [2021-10-08 15:51:42,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 15:51:42,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 15:51:42,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 15:51:42,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 15:51:42,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,766 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 15:51:42,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 15:51:42,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 15:51:42,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 15:51:42,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 15:51:42,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 15:51:42,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 15:51:42,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 15:51:42,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (1/1) ... [2021-10-08 15:51:42,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 15:51:42,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:42,868 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) [2021-10-08 15:51:42,888 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 [2021-10-08 15:51:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 15:51:42,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 15:51:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 15:51:42,948 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 15:51:42,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-08 15:51:42,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 15:51:42,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-08 15:51:42,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 15:51:42,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 15:51:42,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 15:51:42,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 15:51:42,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-08 15:51:42,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 15:51:42,953 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 15:51:43,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 15:51:43,430 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-08 15:51:43,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 03:51:43 BoogieIcfgContainer [2021-10-08 15:51:43,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 15:51:43,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 15:51:43,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 15:51:43,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 15:51:43,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 03:51:42" (1/3) ... [2021-10-08 15:51:43,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1348906d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 03:51:43, skipping insertion in model container [2021-10-08 15:51:43,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:51:42" (2/3) ... [2021-10-08 15:51:43,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1348906d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 03:51:43, skipping insertion in model container [2021-10-08 15:51:43,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 03:51:43" (3/3) ... [2021-10-08 15:51:43,450 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2021-10-08 15:51:43,456 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-08 15:51:43,457 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 15:51:43,457 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-08 15:51:43,457 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 15:51:43,548 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,548 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,549 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,549 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,549 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,549 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,550 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,550 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,550 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,551 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,553 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,554 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,555 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,558 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,559 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,561 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,561 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,561 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,562 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,563 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,563 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,563 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,563 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,564 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,576 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,576 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,576 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,577 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,581 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,582 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:51:43,603 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-08 15:51:43,674 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 15:51:43,690 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 [2021-10-08 15:51:43,691 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-10-08 15:51:43,732 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 15:51:43,745 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 100 transitions, 216 flow [2021-10-08 15:51:43,751 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 100 transitions, 216 flow [2021-10-08 15:51:43,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 100 transitions, 216 flow [2021-10-08 15:51:43,856 INFO L129 PetriNetUnfolder]: 11/98 cut-off events. [2021-10-08 15:51:43,856 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-08 15:51:43,863 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 98 events. 11/98 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 154 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2021-10-08 15:51:43,870 INFO L116 LiptonReduction]: Number of co-enabled transitions 1728 [2021-10-08 15:51:48,055 INFO L131 LiptonReduction]: Checked pairs total: 2156 [2021-10-08 15:51:48,055 INFO L133 LiptonReduction]: Total number of compositions: 104 [2021-10-08 15:51:48,080 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2021-10-08 15:51:48,100 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 122 states, 98 states have (on average 3.0918367346938775) internal successors, (303), 121 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 98 states have (on average 3.0918367346938775) internal successors, (303), 121 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-08 15:51:48,111 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:48,111 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-08 15:51:48,112 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:48,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:48,119 INFO L82 PathProgramCache]: Analyzing trace with hash 439579, now seen corresponding path program 1 times [2021-10-08 15:51:48,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:48,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384398439] [2021-10-08 15:51:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:48,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:48,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:48,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384398439] [2021-10-08 15:51:48,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384398439] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:51:48,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:51:48,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-08 15:51:48,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190717912] [2021-10-08 15:51:48,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:51:48,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:48,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:51:48,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:48,363 INFO L87 Difference]: Start difference. First operand has 122 states, 98 states have (on average 3.0918367346938775) internal successors, (303), 121 states have internal predecessors, (303), 0 states have call successors, (0), 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) [2021-10-08 15:51:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:48,429 INFO L93 Difference]: Finished difference Result 146 states and 364 transitions. [2021-10-08 15:51:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:51:48,432 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 [2021-10-08 15:51:48,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:48,446 INFO L225 Difference]: With dead ends: 146 [2021-10-08 15:51:48,446 INFO L226 Difference]: Without dead ends: 146 [2021-10-08 15:51:48,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-08 15:51:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2021-10-08 15:51:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 114 states have (on average 3.0701754385964914) internal successors, (350), 137 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2021-10-08 15:51:48,505 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 3 [2021-10-08 15:51:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:48,505 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2021-10-08 15:51:48,506 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) [2021-10-08 15:51:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2021-10-08 15:51:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 15:51:48,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:48,507 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 15:51:48,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-08 15:51:48,507 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash 13628591, now seen corresponding path program 1 times [2021-10-08 15:51:48,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:48,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15699373] [2021-10-08 15:51:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:48,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:48,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:48,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15699373] [2021-10-08 15:51:48,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15699373] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:48,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435454030] [2021-10-08 15:51:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:48,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:48,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:48,656 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) [2021-10-08 15:51:48,680 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 [2021-10-08 15:51:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:48,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 15:51:48,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:48,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435454030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:48,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:48,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2021-10-08 15:51:48,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888263214] [2021-10-08 15:51:48,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 15:51:48,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:48,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 15:51:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-08 15:51:48,917 INFO L87 Difference]: Start difference. First operand 138 states and 350 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) [2021-10-08 15:51:49,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:49,107 INFO L93 Difference]: Finished difference Result 234 states and 576 transitions. [2021-10-08 15:51:49,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 15:51:49,108 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 [2021-10-08 15:51:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:49,112 INFO L225 Difference]: With dead ends: 234 [2021-10-08 15:51:49,112 INFO L226 Difference]: Without dead ends: 234 [2021-10-08 15:51:49,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-08 15:51:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-10-08 15:51:49,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 186. [2021-10-08 15:51:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 162 states have (on average 3.253086419753086) internal successors, (527), 185 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 527 transitions. [2021-10-08 15:51:49,164 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 527 transitions. Word has length 4 [2021-10-08 15:51:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:49,165 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 527 transitions. [2021-10-08 15:51:49,165 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) [2021-10-08 15:51:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 527 transitions. [2021-10-08 15:51:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-08 15:51:49,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:49,169 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-08 15:51:49,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-08 15:51:49,380 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 [2021-10-08 15:51:49,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash 422487963, now seen corresponding path program 2 times [2021-10-08 15:51:49,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:49,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019738599] [2021-10-08 15:51:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:49,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:49,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:49,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019738599] [2021-10-08 15:51:49,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019738599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:49,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092306969] [2021-10-08 15:51:49,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:51:49,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:49,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:49,486 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) [2021-10-08 15:51:49,504 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 [2021-10-08 15:51:49,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:51:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:51:49,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 15:51:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:49,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092306969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:49,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:49,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 15:51:49,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800416785] [2021-10-08 15:51:49,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 15:51:49,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:49,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 15:51:49,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-08 15:51:49,858 INFO L87 Difference]: Start difference. First operand 186 states and 527 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) [2021-10-08 15:51:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:50,166 INFO L93 Difference]: Finished difference Result 362 states and 939 transitions. [2021-10-08 15:51:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-08 15:51:50,166 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 [2021-10-08 15:51:50,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:50,171 INFO L225 Difference]: With dead ends: 362 [2021-10-08 15:51:50,171 INFO L226 Difference]: Without dead ends: 352 [2021-10-08 15:51:50,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-08 15:51:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-10-08 15:51:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 230. [2021-10-08 15:51:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 206 states have (on average 3.4514563106796117) internal successors, (711), 229 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 711 transitions. [2021-10-08 15:51:50,196 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 711 transitions. Word has length 5 [2021-10-08 15:51:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:50,196 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 711 transitions. [2021-10-08 15:51:50,196 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) [2021-10-08 15:51:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 711 transitions. [2021-10-08 15:51:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 15:51:50,197 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:50,197 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 15:51:50,237 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 [2021-10-08 15:51:50,410 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 [2021-10-08 15:51:50,412 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:50,413 INFO L82 PathProgramCache]: Analyzing trace with hash 211595222, now seen corresponding path program 1 times [2021-10-08 15:51:50,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:50,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984333372] [2021-10-08 15:51:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:50,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:50,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:50,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984333372] [2021-10-08 15:51:50,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984333372] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:51:50,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:51:50,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:51:50,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366179294] [2021-10-08 15:51:50,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:51:50,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:50,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:51:50,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:51:50,512 INFO L87 Difference]: Start difference. First operand 230 states and 711 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:50,563 INFO L93 Difference]: Finished difference Result 318 states and 923 transitions. [2021-10-08 15:51:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:51:50,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have 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 [2021-10-08 15:51:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:50,567 INFO L225 Difference]: With dead ends: 318 [2021-10-08 15:51:50,567 INFO L226 Difference]: Without dead ends: 318 [2021-10-08 15:51:50,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:51:50,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-10-08 15:51:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 276. [2021-10-08 15:51:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 252 states have (on average 3.5) internal successors, (882), 275 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 882 transitions. [2021-10-08 15:51:50,585 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 882 transitions. Word has length 6 [2021-10-08 15:51:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:50,586 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 882 transitions. [2021-10-08 15:51:50,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 882 transitions. [2021-10-08 15:51:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 15:51:50,587 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:50,587 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:50,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-08 15:51:50,588 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:50,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:50,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2030492260, now seen corresponding path program 1 times [2021-10-08 15:51:50,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:50,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139521054] [2021-10-08 15:51:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:50,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:50,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:50,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139521054] [2021-10-08 15:51:50,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139521054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:50,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659243431] [2021-10-08 15:51:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:50,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:50,655 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) [2021-10-08 15:51:50,675 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 [2021-10-08 15:51:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:50,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 15:51:50,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:50,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659243431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:50,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:50,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-08 15:51:50,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349609848] [2021-10-08 15:51:50,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:51:50,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:50,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:51:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:51:50,757 INFO L87 Difference]: Start difference. First operand 276 states and 882 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:50,819 INFO L93 Difference]: Finished difference Result 470 states and 1462 transitions. [2021-10-08 15:51:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:51:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 15:51:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:50,827 INFO L225 Difference]: With dead ends: 470 [2021-10-08 15:51:50,827 INFO L226 Difference]: Without dead ends: 470 [2021-10-08 15:51:50,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:51:50,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-10-08 15:51:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 310. [2021-10-08 15:51:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 286 states have (on average 3.629370629370629) internal successors, (1038), 309 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 1038 transitions. [2021-10-08 15:51:50,852 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 1038 transitions. Word has length 7 [2021-10-08 15:51:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:50,853 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 1038 transitions. [2021-10-08 15:51:50,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 1038 transitions. [2021-10-08 15:51:50,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 15:51:50,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:50,857 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:50,906 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 [2021-10-08 15:51:51,070 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 [2021-10-08 15:51:51,071 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:51,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:51,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2030526863, now seen corresponding path program 1 times [2021-10-08 15:51:51,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:51,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511487632] [2021-10-08 15:51:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:51,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:51,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:51,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511487632] [2021-10-08 15:51:51,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511487632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:51,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178823740] [2021-10-08 15:51:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:51,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:51,150 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) [2021-10-08 15:51:51,169 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 [2021-10-08 15:51:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:51,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-08 15:51:51,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:51,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178823740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:51,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:51,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-08 15:51:51,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424473771] [2021-10-08 15:51:51,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:51:51,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:51:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:51:51,235 INFO L87 Difference]: Start difference. First operand 310 states and 1038 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:51,302 INFO L93 Difference]: Finished difference Result 474 states and 1462 transitions. [2021-10-08 15:51:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:51:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 15:51:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:51,306 INFO L225 Difference]: With dead ends: 474 [2021-10-08 15:51:51,307 INFO L226 Difference]: Without dead ends: 474 [2021-10-08 15:51:51,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:51:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-10-08 15:51:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 372. [2021-10-08 15:51:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 348 states have (on average 3.6149425287356323) internal successors, (1258), 371 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1258 transitions. [2021-10-08 15:51:51,323 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1258 transitions. Word has length 7 [2021-10-08 15:51:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:51,323 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1258 transitions. [2021-10-08 15:51:51,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1258 transitions. [2021-10-08 15:51:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-08 15:51:51,325 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:51,325 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-08 15:51:51,360 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 [2021-10-08 15:51:51,538 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 [2021-10-08 15:51:51,539 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2030480828, now seen corresponding path program 2 times [2021-10-08 15:51:51,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:51,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647881681] [2021-10-08 15:51:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:51,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:51,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:51,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647881681] [2021-10-08 15:51:51,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647881681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:51,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931212978] [2021-10-08 15:51:51,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:51:51,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:51,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:51,651 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) [2021-10-08 15:51:51,660 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 [2021-10-08 15:51:51,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:51:51,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:51:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 15:51:51,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:51,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931212978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:51,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:51,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-10-08 15:51:51,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810399771] [2021-10-08 15:51:51,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 15:51:51,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:51,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 15:51:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-08 15:51:51,871 INFO L87 Difference]: Start difference. First operand 372 states and 1258 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:52,033 INFO L93 Difference]: Finished difference Result 538 states and 1665 transitions. [2021-10-08 15:51:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 15:51:52,033 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-08 15:51:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:52,039 INFO L225 Difference]: With dead ends: 538 [2021-10-08 15:51:52,039 INFO L226 Difference]: Without dead ends: 538 [2021-10-08 15:51:52,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-08 15:51:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-10-08 15:51:52,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 416. [2021-10-08 15:51:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 392 states have (on average 3.5280612244897958) internal successors, (1383), 415 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1383 transitions. [2021-10-08 15:51:52,058 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1383 transitions. Word has length 7 [2021-10-08 15:51:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:52,059 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1383 transitions. [2021-10-08 15:51:52,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1383 transitions. [2021-10-08 15:51:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 15:51:52,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:52,060 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:52,096 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 [2021-10-08 15:51:52,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:52,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:52,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1478178569, now seen corresponding path program 1 times [2021-10-08 15:51:52,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:52,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278925926] [2021-10-08 15:51:52,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:52,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:52,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:52,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278925926] [2021-10-08 15:51:52,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278925926] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:52,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277767976] [2021-10-08 15:51:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:52,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:52,333 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) [2021-10-08 15:51:52,335 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 [2021-10-08 15:51:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:52,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 15:51:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:52,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277767976] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:52,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:52,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2021-10-08 15:51:52,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977023974] [2021-10-08 15:51:52,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 15:51:52,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:52,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 15:51:52,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-08 15:51:52,504 INFO L87 Difference]: Start difference. First operand 416 states and 1383 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-10-08 15:51:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:52,716 INFO L93 Difference]: Finished difference Result 736 states and 2220 transitions. [2021-10-08 15:51:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 15:51:52,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 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 8 [2021-10-08 15:51:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:52,744 INFO L225 Difference]: With dead ends: 736 [2021-10-08 15:51:52,744 INFO L226 Difference]: Without dead ends: 736 [2021-10-08 15:51:52,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-08 15:51:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-10-08 15:51:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 530. [2021-10-08 15:51:52,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 506 states have (on average 3.652173913043478) internal successors, (1848), 529 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1848 transitions. [2021-10-08 15:51:52,768 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1848 transitions. Word has length 8 [2021-10-08 15:51:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:52,768 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1848 transitions. [2021-10-08 15:51:52,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 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) [2021-10-08 15:51:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1848 transitions. [2021-10-08 15:51:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 15:51:52,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:52,770 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:52,806 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 [2021-10-08 15:51:52,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:52,984 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1421189200, now seen corresponding path program 1 times [2021-10-08 15:51:52,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:52,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402303301] [2021-10-08 15:51:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:52,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:51:53,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:53,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402303301] [2021-10-08 15:51:53,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402303301] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:51:53,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:51:53,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:51:53,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938462950] [2021-10-08 15:51:53,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:51:53,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:53,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:51:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:53,026 INFO L87 Difference]: Start difference. First operand 530 states and 1848 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:53,065 INFO L93 Difference]: Finished difference Result 656 states and 2247 transitions. [2021-10-08 15:51:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:51:53,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-08 15:51:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:53,073 INFO L225 Difference]: With dead ends: 656 [2021-10-08 15:51:53,073 INFO L226 Difference]: Without dead ends: 656 [2021-10-08 15:51:53,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:51:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-10-08 15:51:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 574. [2021-10-08 15:51:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 550 states have (on average 3.6745454545454543) internal successors, (2021), 573 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 2021 transitions. [2021-10-08 15:51:53,100 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 2021 transitions. Word has length 9 [2021-10-08 15:51:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:53,100 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 2021 transitions. [2021-10-08 15:51:53,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:53,101 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 2021 transitions. [2021-10-08 15:51:53,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 15:51:53,102 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:53,102 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:53,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-08 15:51:53,103 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:53,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1421189225, now seen corresponding path program 2 times [2021-10-08 15:51:53,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:53,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435283602] [2021-10-08 15:51:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:53,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:53,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:53,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435283602] [2021-10-08 15:51:53,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435283602] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:53,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261205786] [2021-10-08 15:51:53,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:51:53,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:53,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:53,216 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) [2021-10-08 15:51:53,238 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 [2021-10-08 15:51:53,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:51:53,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:51:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 15:51:53,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:53,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261205786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:53,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:53,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-10-08 15:51:53,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014748019] [2021-10-08 15:51:53,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-08 15:51:53,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-08 15:51:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-08 15:51:53,447 INFO L87 Difference]: Start difference. First operand 574 states and 2021 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-10-08 15:51:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:53,677 INFO L93 Difference]: Finished difference Result 914 states and 2992 transitions. [2021-10-08 15:51:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 15:51:53,677 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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 [2021-10-08 15:51:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:53,686 INFO L225 Difference]: With dead ends: 914 [2021-10-08 15:51:53,686 INFO L226 Difference]: Without dead ends: 914 [2021-10-08 15:51:53,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-08 15:51:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-10-08 15:51:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 652. [2021-10-08 15:51:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 628 states have (on average 3.609872611464968) internal successors, (2267), 651 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 2267 transitions. [2021-10-08 15:51:53,717 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 2267 transitions. Word has length 9 [2021-10-08 15:51:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:53,717 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 2267 transitions. [2021-10-08 15:51:53,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-10-08 15:51:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 2267 transitions. [2021-10-08 15:51:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 15:51:53,719 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:53,719 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:53,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-08 15:51:53,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-08 15:51:53,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:53,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1107277585, now seen corresponding path program 1 times [2021-10-08 15:51:53,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:53,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235141809] [2021-10-08 15:51:53,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:53,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:54,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:54,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235141809] [2021-10-08 15:51:54,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235141809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:54,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070335439] [2021-10-08 15:51:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:54,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:54,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:54,042 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) [2021-10-08 15:51:54,046 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 [2021-10-08 15:51:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:54,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-08 15:51:54,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:54,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070335439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:54,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:54,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2021-10-08 15:51:54,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164232733] [2021-10-08 15:51:54,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 15:51:54,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:54,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 15:51:54,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-08 15:51:54,327 INFO L87 Difference]: Start difference. First operand 652 states and 2267 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) [2021-10-08 15:51:54,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:54,790 INFO L93 Difference]: Finished difference Result 1242 states and 3660 transitions. [2021-10-08 15:51:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-08 15:51:54,791 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 [2021-10-08 15:51:54,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:54,801 INFO L225 Difference]: With dead ends: 1242 [2021-10-08 15:51:54,802 INFO L226 Difference]: Without dead ends: 1156 [2021-10-08 15:51:54,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-10-08 15:51:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-10-08 15:51:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 702. [2021-10-08 15:51:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 678 states have (on average 3.5073746312684366) internal successors, (2378), 701 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 2378 transitions. [2021-10-08 15:51:54,839 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 2378 transitions. Word has length 10 [2021-10-08 15:51:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:54,839 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 2378 transitions. [2021-10-08 15:51:54,839 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) [2021-10-08 15:51:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 2378 transitions. [2021-10-08 15:51:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 15:51:54,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:54,841 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:54,879 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 [2021-10-08 15:51:55,051 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,SelfDestructingSolverStorable10 [2021-10-08 15:51:55,053 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:55,053 INFO L82 PathProgramCache]: Analyzing trace with hash 36457735, now seen corresponding path program 1 times [2021-10-08 15:51:55,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:55,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085529754] [2021-10-08 15:51:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:55,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:55,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:55,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:55,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085529754] [2021-10-08 15:51:55,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085529754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:55,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802256596] [2021-10-08 15:51:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:55,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:55,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:55,129 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) [2021-10-08 15:51:55,155 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 [2021-10-08 15:51:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:55,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 15:51:55,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:55,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802256596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:55,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:55,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-08 15:51:55,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866239553] [2021-10-08 15:51:55,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 15:51:55,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 15:51:55,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-08 15:51:55,380 INFO L87 Difference]: Start difference. First operand 702 states and 2378 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2021-10-08 15:51:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:55,616 INFO L93 Difference]: Finished difference Result 1184 states and 3781 transitions. [2021-10-08 15:51:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 15:51:55,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 11 [2021-10-08 15:51:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:55,626 INFO L225 Difference]: With dead ends: 1184 [2021-10-08 15:51:55,626 INFO L226 Difference]: Without dead ends: 1184 [2021-10-08 15:51:55,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-08 15:51:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-10-08 15:51:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 792. [2021-10-08 15:51:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 768 states have (on average 3.6640625) internal successors, (2814), 791 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2814 transitions. [2021-10-08 15:51:55,662 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2814 transitions. Word has length 11 [2021-10-08 15:51:55,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:55,662 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2814 transitions. [2021-10-08 15:51:55,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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) [2021-10-08 15:51:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2814 transitions. [2021-10-08 15:51:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 15:51:55,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:55,664 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:55,700 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 [2021-10-08 15:51:55,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:55,879 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:55,880 INFO L82 PathProgramCache]: Analyzing trace with hash 108849865, now seen corresponding path program 2 times [2021-10-08 15:51:55,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:55,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020786034] [2021-10-08 15:51:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:55,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 15:51:55,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:55,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020786034] [2021-10-08 15:51:55,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020786034] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:51:55,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:51:55,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 15:51:55,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458453589] [2021-10-08 15:51:55,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:51:55,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:51:55,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:51:55,930 INFO L87 Difference]: Start difference. First operand 792 states and 2814 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) [2021-10-08 15:51:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:55,961 INFO L93 Difference]: Finished difference Result 716 states and 2182 transitions. [2021-10-08 15:51:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:51:55,962 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 11 [2021-10-08 15:51:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:55,968 INFO L225 Difference]: With dead ends: 716 [2021-10-08 15:51:55,968 INFO L226 Difference]: Without dead ends: 696 [2021-10-08 15:51:55,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:51:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-10-08 15:51:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 538. [2021-10-08 15:51:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 516 states have (on average 3.2131782945736433) internal successors, (1658), 537 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1658 transitions. [2021-10-08 15:51:55,989 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1658 transitions. Word has length 11 [2021-10-08 15:51:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:55,989 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1658 transitions. [2021-10-08 15:51:55,989 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) [2021-10-08 15:51:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1658 transitions. [2021-10-08 15:51:55,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 15:51:55,990 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:55,991 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:55,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-08 15:51:55,991 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash 108851695, now seen corresponding path program 1 times [2021-10-08 15:51:55,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:55,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176032920] [2021-10-08 15:51:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:55,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:56,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:56,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176032920] [2021-10-08 15:51:56,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176032920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:56,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448817876] [2021-10-08 15:51:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:56,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:56,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:56,069 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) [2021-10-08 15:51:56,075 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 [2021-10-08 15:51:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 15:51:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:51:56,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448817876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:56,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:56,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-10-08 15:51:56,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534462125] [2021-10-08 15:51:56,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 15:51:56,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:56,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 15:51:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-08 15:51:56,270 INFO L87 Difference]: Start difference. First operand 538 states and 1658 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:56,591 INFO L93 Difference]: Finished difference Result 1348 states and 3843 transitions. [2021-10-08 15:51:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 15:51:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-08 15:51:56,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:56,601 INFO L225 Difference]: With dead ends: 1348 [2021-10-08 15:51:56,601 INFO L226 Difference]: Without dead ends: 1324 [2021-10-08 15:51:56,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-10-08 15:51:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-10-08 15:51:56,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 656. [2021-10-08 15:51:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 638 states have (on average 3.3213166144200628) internal successors, (2119), 655 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 2119 transitions. [2021-10-08 15:51:56,631 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 2119 transitions. Word has length 11 [2021-10-08 15:51:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:56,631 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 2119 transitions. [2021-10-08 15:51:56,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 2119 transitions. [2021-10-08 15:51:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 15:51:56,633 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:56,633 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:56,663 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 [2021-10-08 15:51:56,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-08 15:51:56,847 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:56,848 INFO L82 PathProgramCache]: Analyzing trace with hash -920622637, now seen corresponding path program 1 times [2021-10-08 15:51:56,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:56,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30221477] [2021-10-08 15:51:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:56,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 15:51:56,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:56,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30221477] [2021-10-08 15:51:56,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30221477] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:51:56,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:51:56,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 15:51:56,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39523115] [2021-10-08 15:51:56,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:51:56,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:51:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:51:56,887 INFO L87 Difference]: Start difference. First operand 656 states and 2119 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:56,936 INFO L93 Difference]: Finished difference Result 930 states and 2876 transitions. [2021-10-08 15:51:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:51:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have 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 [2021-10-08 15:51:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:56,944 INFO L225 Difference]: With dead ends: 930 [2021-10-08 15:51:56,944 INFO L226 Difference]: Without dead ends: 892 [2021-10-08 15:51:56,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:51:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-10-08 15:51:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 680. [2021-10-08 15:51:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 662 states have (on average 3.226586102719033) internal successors, (2136), 679 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2136 transitions. [2021-10-08 15:51:56,970 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2136 transitions. Word has length 12 [2021-10-08 15:51:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:56,971 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2136 transitions. [2021-10-08 15:51:56,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2136 transitions. [2021-10-08 15:51:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 15:51:56,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:56,973 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:56,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-08 15:51:56,973 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:56,974 INFO L82 PathProgramCache]: Analyzing trace with hash -920205507, now seen corresponding path program 1 times [2021-10-08 15:51:56,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:56,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040067720] [2021-10-08 15:51:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:56,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 15:51:57,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:57,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040067720] [2021-10-08 15:51:57,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040067720] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:51:57,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:51:57,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-08 15:51:57,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336206481] [2021-10-08 15:51:57,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:51:57,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:51:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:51:57,012 INFO L87 Difference]: Start difference. First operand 680 states and 2136 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-10-08 15:51:57,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:57,058 INFO L93 Difference]: Finished difference Result 772 states and 2330 transitions. [2021-10-08 15:51:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:51:57,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 12 [2021-10-08 15:51:57,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:57,065 INFO L225 Difference]: With dead ends: 772 [2021-10-08 15:51:57,065 INFO L226 Difference]: Without dead ends: 772 [2021-10-08 15:51:57,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:51:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-10-08 15:51:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 658. [2021-10-08 15:51:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 643 states have (on average 3.1664074650077763) internal successors, (2036), 657 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2036 transitions. [2021-10-08 15:51:57,089 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2036 transitions. Word has length 12 [2021-10-08 15:51:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:57,089 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2036 transitions. [2021-10-08 15:51:57,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-10-08 15:51:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2036 transitions. [2021-10-08 15:51:57,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 15:51:57,091 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:57,091 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:57,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-08 15:51:57,092 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:57,092 INFO L82 PathProgramCache]: Analyzing trace with hash -920205523, now seen corresponding path program 1 times [2021-10-08 15:51:57,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:57,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732327468] [2021-10-08 15:51:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:57,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 15:51:57,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:57,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732327468] [2021-10-08 15:51:57,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732327468] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:57,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049919858] [2021-10-08 15:51:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:57,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:57,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:57,130 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) [2021-10-08 15:51:57,137 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 [2021-10-08 15:51:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:57,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 15:51:57,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:51:57,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049919858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:57,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:57,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-10-08 15:51:57,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447080791] [2021-10-08 15:51:57,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-08 15:51:57,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-08 15:51:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-08 15:51:57,310 INFO L87 Difference]: Start difference. First operand 658 states and 2036 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:57,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:57,448 INFO L93 Difference]: Finished difference Result 960 states and 2856 transitions. [2021-10-08 15:51:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 15:51:57,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-08 15:51:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:57,457 INFO L225 Difference]: With dead ends: 960 [2021-10-08 15:51:57,457 INFO L226 Difference]: Without dead ends: 958 [2021-10-08 15:51:57,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-10-08 15:51:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-10-08 15:51:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 700. [2021-10-08 15:51:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 685 states have (on average 3.254014598540146) internal successors, (2229), 699 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2229 transitions. [2021-10-08 15:51:57,499 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2229 transitions. Word has length 12 [2021-10-08 15:51:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:57,499 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 2229 transitions. [2021-10-08 15:51:57,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2229 transitions. [2021-10-08 15:51:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-08 15:51:57,501 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:57,501 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:57,539 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 [2021-10-08 15:51:57,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:57,714 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash -918775657, now seen corresponding path program 2 times [2021-10-08 15:51:57,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:57,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040803504] [2021-10-08 15:51:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:57,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:57,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:57,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040803504] [2021-10-08 15:51:57,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040803504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:57,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026656003] [2021-10-08 15:51:57,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:51:57,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:57,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:57,846 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) [2021-10-08 15:51:57,865 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 [2021-10-08 15:51:57,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:51:57,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:51:57,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 15:51:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:58,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026656003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:58,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:58,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2021-10-08 15:51:58,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180969172] [2021-10-08 15:51:58,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-08 15:51:58,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:58,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-08 15:51:58,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-10-08 15:51:58,141 INFO L87 Difference]: Start difference. First operand 700 states and 2229 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) [2021-10-08 15:51:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:58,367 INFO L93 Difference]: Finished difference Result 882 states and 2560 transitions. [2021-10-08 15:51:58,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-08 15:51:58,367 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 [2021-10-08 15:51:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:58,375 INFO L225 Difference]: With dead ends: 882 [2021-10-08 15:51:58,375 INFO L226 Difference]: Without dead ends: 832 [2021-10-08 15:51:58,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-10-08 15:51:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-10-08 15:51:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 638. [2021-10-08 15:51:58,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 623 states have (on average 3.1524879614767256) internal successors, (1964), 637 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1964 transitions. [2021-10-08 15:51:58,401 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1964 transitions. Word has length 12 [2021-10-08 15:51:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:58,401 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1964 transitions. [2021-10-08 15:51:58,401 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) [2021-10-08 15:51:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1964 transitions. [2021-10-08 15:51:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 15:51:58,403 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:58,403 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:58,444 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 [2021-10-08 15:51:58,616 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,SelfDestructingSolverStorable17 [2021-10-08 15:51:58,617 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1556964670, now seen corresponding path program 1 times [2021-10-08 15:51:58,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:58,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024756680] [2021-10-08 15:51:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:58,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 15:51:58,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:58,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024756680] [2021-10-08 15:51:58,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024756680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:58,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864988667] [2021-10-08 15:51:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:58,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:58,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:58,683 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) [2021-10-08 15:51:58,717 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 [2021-10-08 15:51:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:58,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 15:51:58,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:59,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864988667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:59,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:59,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 9] total 12 [2021-10-08 15:51:59,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594367802] [2021-10-08 15:51:59,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 15:51:59,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:59,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 15:51:59,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-08 15:51:59,061 INFO L87 Difference]: Start difference. First operand 638 states and 1964 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:51:59,270 INFO L93 Difference]: Finished difference Result 1258 states and 3660 transitions. [2021-10-08 15:51:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-08 15:51:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-08 15:51:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:51:59,279 INFO L225 Difference]: With dead ends: 1258 [2021-10-08 15:51:59,280 INFO L226 Difference]: Without dead ends: 1178 [2021-10-08 15:51:59,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-10-08 15:51:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-10-08 15:51:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 672. [2021-10-08 15:51:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 659 states have (on average 3.159332321699545) internal successors, (2082), 671 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2082 transitions. [2021-10-08 15:51:59,327 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2082 transitions. Word has length 13 [2021-10-08 15:51:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:51:59,327 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 2082 transitions. [2021-10-08 15:51:59,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:51:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2082 transitions. [2021-10-08 15:51:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 15:51:59,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:51:59,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:51:59,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-08 15:51:59,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:59,545 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:51:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:51:59,546 INFO L82 PathProgramCache]: Analyzing trace with hash 676526275, now seen corresponding path program 1 times [2021-10-08 15:51:59,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:51:59,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224879763] [2021-10-08 15:51:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:59,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:51:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 15:51:59,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:51:59,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224879763] [2021-10-08 15:51:59,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224879763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:59,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336414229] [2021-10-08 15:51:59,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:51:59,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:51:59,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:51:59,622 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) [2021-10-08 15:51:59,647 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 [2021-10-08 15:51:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:51:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-08 15:51:59,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:51:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:51:59,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336414229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:51:59,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:51:59,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 11 [2021-10-08 15:51:59,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299514240] [2021-10-08 15:51:59,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 15:51:59,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:51:59,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 15:51:59,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-10-08 15:51:59,942 INFO L87 Difference]: Start difference. First operand 672 states and 2082 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:00,141 INFO L93 Difference]: Finished difference Result 1360 states and 4042 transitions. [2021-10-08 15:52:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-08 15:52:00,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-08 15:52:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:00,153 INFO L225 Difference]: With dead ends: 1360 [2021-10-08 15:52:00,153 INFO L226 Difference]: Without dead ends: 1318 [2021-10-08 15:52:00,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-10-08 15:52:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-10-08 15:52:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 984. [2021-10-08 15:52:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 971 states have (on average 3.2605561277033988) internal successors, (3166), 983 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3166 transitions. [2021-10-08 15:52:00,193 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3166 transitions. Word has length 13 [2021-10-08 15:52:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:00,193 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 3166 transitions. [2021-10-08 15:52:00,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3166 transitions. [2021-10-08 15:52:00,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 15:52:00,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:00,195 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:00,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-08 15:52:00,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:00,409 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:52:00,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:00,410 INFO L82 PathProgramCache]: Analyzing trace with hash 685998365, now seen corresponding path program 2 times [2021-10-08 15:52:00,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:00,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399084665] [2021-10-08 15:52:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:00,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:52:00,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:00,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399084665] [2021-10-08 15:52:00,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399084665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:00,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708424037] [2021-10-08 15:52:00,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:52:00,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:00,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:00,554 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) [2021-10-08 15:52:00,562 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 [2021-10-08 15:52:00,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:52:00,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:00,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 15:52:00,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:00,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708424037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:00,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:00,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-08 15:52:00,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093008845] [2021-10-08 15:52:00,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 15:52:00,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:00,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 15:52:00,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-10-08 15:52:00,921 INFO L87 Difference]: Start difference. First operand 984 states and 3166 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2021-10-08 15:52:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:01,236 INFO L93 Difference]: Finished difference Result 2356 states and 7326 transitions. [2021-10-08 15:52:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 15:52:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 [2021-10-08 15:52:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:01,249 INFO L225 Difference]: With dead ends: 2356 [2021-10-08 15:52:01,249 INFO L226 Difference]: Without dead ends: 2244 [2021-10-08 15:52:01,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-10-08 15:52:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-10-08 15:52:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1610. [2021-10-08 15:52:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1597 states have (on average 3.231684408265498) internal successors, (5161), 1609 states have internal predecessors, (5161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5161 transitions. [2021-10-08 15:52:01,320 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5161 transitions. Word has length 14 [2021-10-08 15:52:01,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:01,321 INFO L470 AbstractCegarLoop]: Abstraction has 1610 states and 5161 transitions. [2021-10-08 15:52:01,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2021-10-08 15:52:01,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5161 transitions. [2021-10-08 15:52:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 15:52:01,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:01,323 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:01,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-08 15:52:01,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:01,539 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:52:01,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:01,540 INFO L82 PathProgramCache]: Analyzing trace with hash 57838857, now seen corresponding path program 2 times [2021-10-08 15:52:01,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:01,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996380897] [2021-10-08 15:52:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:01,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:01,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:01,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996380897] [2021-10-08 15:52:01,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996380897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:01,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634875110] [2021-10-08 15:52:01,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:52:01,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:01,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:01,669 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) [2021-10-08 15:52:01,671 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 [2021-10-08 15:52:01,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:52:01,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:01,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 15:52:01,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:02,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634875110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:02,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:02,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-10-08 15:52:02,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900732318] [2021-10-08 15:52:02,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 15:52:02,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 15:52:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-08 15:52:02,030 INFO L87 Difference]: Start difference. First operand 1610 states and 5161 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) [2021-10-08 15:52:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:02,386 INFO L93 Difference]: Finished difference Result 2016 states and 5939 transitions. [2021-10-08 15:52:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 15:52:02,387 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 [2021-10-08 15:52:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:02,394 INFO L225 Difference]: With dead ends: 2016 [2021-10-08 15:52:02,395 INFO L226 Difference]: Without dead ends: 1956 [2021-10-08 15:52:02,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-10-08 15:52:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-10-08 15:52:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 606. [2021-10-08 15:52:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 598 states have (on average 2.8244147157190636) internal successors, (1689), 605 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1689 transitions. [2021-10-08 15:52:02,431 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1689 transitions. Word has length 14 [2021-10-08 15:52:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:02,431 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1689 transitions. [2021-10-08 15:52:02,432 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) [2021-10-08 15:52:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1689 transitions. [2021-10-08 15:52:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-08 15:52:02,433 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:02,433 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:02,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-08 15:52:02,647 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,SelfDestructingSolverStorable21 [2021-10-08 15:52:02,648 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:52:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:02,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1265065301, now seen corresponding path program 1 times [2021-10-08 15:52:02,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:02,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298056642] [2021-10-08 15:52:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:02,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-08 15:52:02,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:02,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298056642] [2021-10-08 15:52:02,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298056642] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:02,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:02,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 15:52:02,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549438172] [2021-10-08 15:52:02,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:02,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:02,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:02,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:02,705 INFO L87 Difference]: Start difference. First operand 606 states and 1689 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:02,729 INFO L93 Difference]: Finished difference Result 646 states and 1771 transitions. [2021-10-08 15:52:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have 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 [2021-10-08 15:52:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:02,732 INFO L225 Difference]: With dead ends: 646 [2021-10-08 15:52:02,732 INFO L226 Difference]: Without dead ends: 646 [2021-10-08 15:52:02,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-10-08 15:52:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 574. [2021-10-08 15:52:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 569 states have (on average 2.803163444639719) internal successors, (1595), 573 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1595 transitions. [2021-10-08 15:52:02,748 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1595 transitions. Word has length 16 [2021-10-08 15:52:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:02,749 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 1595 transitions. [2021-10-08 15:52:02,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1595 transitions. [2021-10-08 15:52:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-08 15:52:02,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:02,751 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:02,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-08 15:52:02,751 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2021-10-08 15:52:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:02,752 INFO L82 PathProgramCache]: Analyzing trace with hash 562318643, now seen corresponding path program 1 times [2021-10-08 15:52:02,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:02,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084418325] [2021-10-08 15:52:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:02,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 15:52:02,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:02,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084418325] [2021-10-08 15:52:02,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084418325] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:02,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960607507] [2021-10-08 15:52:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:02,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:02,989 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) [2021-10-08 15:52:02,998 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 [2021-10-08 15:52:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:03,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-08 15:52:03,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 15:52:03,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960607507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:03,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:03,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2021-10-08 15:52:03,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093795402] [2021-10-08 15:52:03,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-08 15:52:03,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:03,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-08 15:52:03,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-10-08 15:52:03,521 INFO L87 Difference]: Start difference. First operand 574 states and 1595 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:03,731 INFO L93 Difference]: Finished difference Result 986 states and 2698 transitions. [2021-10-08 15:52:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 15:52:03,732 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-10-08 15:52:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:03,732 INFO L225 Difference]: With dead ends: 986 [2021-10-08 15:52:03,732 INFO L226 Difference]: Without dead ends: 0 [2021-10-08 15:52:03,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2021-10-08 15:52:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-08 15:52:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-08 15:52:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-08 15:52:03,733 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-10-08 15:52:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:03,733 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-08 15:52:03,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-08 15:52:03,734 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-08 15:52:03,737 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,737 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,737 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,737 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 15:52:03,738 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 15:52:03,739 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,739 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,739 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,739 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,739 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,739 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,740 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,740 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:03,766 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 [2021-10-08 15:52:03,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:03,962 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 15:52:03,962 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 15:52:03,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 03:52:03 BasicIcfg [2021-10-08 15:52:03,964 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 15:52:03,965 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-08 15:52:03,965 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-08 15:52:03,965 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-08 15:52:03,966 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 03:51:43" (3/4) ... [2021-10-08 15:52:03,968 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-08 15:52:03,974 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-08 15:52:03,974 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-08 15:52:03,978 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-08 15:52:03,978 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-08 15:52:03,978 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-08 15:52:03,978 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-08 15:52:04,014 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/weaver/parallel-misc-3.wvr.c-witness.graphml [2021-10-08 15:52:04,014 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-08 15:52:04,016 INFO L168 Benchmark]: Toolchain (without parser) took 21596.59 ms. Allocated memory was 162.5 MB in the beginning and 238.0 MB in the end (delta: 75.5 MB). Free memory was 136.6 MB in the beginning and 91.6 MB in the end (delta: 45.0 MB). Peak memory consumption was 120.9 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:04,016 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 162.5 MB. Free memory is still 133.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 15:52:04,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.20 ms. Allocated memory is still 162.5 MB. Free memory was 136.0 MB in the beginning and 125.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:04,017 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.02 ms. Allocated memory is still 162.5 MB. Free memory was 125.5 MB in the beginning and 124.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:04,018 INFO L168 Benchmark]: Boogie Preprocessor took 53.12 ms. Allocated memory is still 162.5 MB. Free memory was 124.0 MB in the beginning and 122.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:04,018 INFO L168 Benchmark]: RCFGBuilder took 616.97 ms. Allocated memory is still 162.5 MB. Free memory was 122.6 MB in the beginning and 107.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:04,018 INFO L168 Benchmark]: TraceAbstraction took 20524.06 ms. Allocated memory was 162.5 MB in the beginning and 238.0 MB in the end (delta: 75.5 MB). Free memory was 107.5 MB in the beginning and 94.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 89.5 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:04,019 INFO L168 Benchmark]: Witness Printer took 49.52 ms. Allocated memory is still 238.0 MB. Free memory was 94.2 MB in the beginning and 91.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:04,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 162.5 MB. Free memory is still 133.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.20 ms. Allocated memory is still 162.5 MB. Free memory was 136.0 MB in the beginning and 125.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 61.02 ms. Allocated memory is still 162.5 MB. Free memory was 125.5 MB in the beginning and 124.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.12 ms. Allocated memory is still 162.5 MB. Free memory was 124.0 MB in the beginning and 122.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 616.97 ms. Allocated memory is still 162.5 MB. Free memory was 122.6 MB in the beginning and 107.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20524.06 ms. Allocated memory was 162.5 MB in the beginning and 238.0 MB in the end (delta: 75.5 MB). Free memory was 107.5 MB in the beginning and 94.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 89.5 MB. Max. memory is 8.0 GB. * Witness Printer took 49.52 ms. Allocated memory is still 238.0 MB. Free memory was 94.2 MB in the beginning and 91.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4304.6ms, 96 PlacesBefore, 30 PlacesAfterwards, 100 TransitionsBefore, 26 TransitionsAfterwards, 1728 CoEnabledTransitionPairs, 5 FixpointIterations, 34 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 9 ConcurrentYvCompositions, 8 ChoiceCompositions, 104 TotalNumberOfCompositions, 2156 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1909, positive: 1885, positive conditional: 0, positive unconditional: 1885, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1072, positive: 1053, positive conditional: 0, positive unconditional: 1053, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1072, positive: 1044, positive conditional: 0, positive unconditional: 1044, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 28, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 138, positive: 44, positive conditional: 0, positive unconditional: 44, negative: 94, negative conditional: 0, negative unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1909, positive: 832, positive conditional: 0, positive unconditional: 832, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 1072, unknown conditional: 0, unknown unconditional: 1072] , Statistics on independence cache: Total cache size (in pairs): 68, Positive cache size: 64, Positive conditional cache size: 0, Positive unconditional cache size: 64, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 45]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 49]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 49]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 66]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 68]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 66]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 68]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 130 locations, 18 error locations. Started 1 CEGAR loops. OverallTime: 20287.0ms, OverallIterations: 24, TraceHistogramMax: 8, EmptinessCheckTime: 40.3ms, AutomataDifference: 4484.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4409.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 1841 SDslu, 1907 SDs, 0 SdLazy, 2599 SolverSat, 880 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2410.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 328 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1797.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1610occurred in iteration=21, InterpolantAutomatonStates: 216, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 711.7ms AutomataMinimizationTime, 24 MinimizatonAttempts, 6500 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 164.5ms SsaConstructionTime, 747.4ms SatisfiabilityAnalysisTime, 4326.5ms InterpolantComputationTime, 417 NumberOfCodeBlocks, 417 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 376 ConstructedInterpolants, 0 QuantifiedInterpolants, 2510 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1447 ConjunctsInSsa, 211 ConjunctsInUnsatCore, 41 InterpolantComputations, 7 PerfectInterpolantSequences, 115/291 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-08 15:52:04,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...