/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Overflow-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 15:08:35,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 15:08:35,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 15:08:35,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 15:08:35,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-07 15:08:35,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-07 15:08:35,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-07 15:08:35,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-10-07 15:08:35,695 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 15:08:35,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 15:08:35,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 15:08:35,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 15:08:35,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 15:08:35,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 15:08:35,701 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 15:08:35,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 15:08:35,701 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 15:08:35,702 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 15:08:35,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 15:08:35,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 15:08:35,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 15:08:35,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-07 15:08:35,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 15:08:35,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-07 15:08:35,704 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-07 15:08:35,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 15:08:35,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-07 15:08:35,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 15:08:35,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-07 15:08:35,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 15:08:35,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 15:08:35,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 15:08:35,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:08:35,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 15:08:35,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 15:08:35,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-07 15:08:35,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-07 15:08:35,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-07 15:08:35,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-07 15:08:35,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 15:08:35,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 15:08:36,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 15:08:36,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 15:08:36,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 15:08:36,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 15:08:36,179 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 15:08:36,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2021-10-07 15:08:36,269 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/627bf3a12/bda81020bfbe49caaac153b83a641065/FLAGe5d001389 [2021-10-07 15:08:37,010 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 15:08:37,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2021-10-07 15:08:37,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/627bf3a12/bda81020bfbe49caaac153b83a641065/FLAGe5d001389 [2021-10-07 15:08:37,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/627bf3a12/bda81020bfbe49caaac153b83a641065 [2021-10-07 15:08:37,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 15:08:37,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-07 15:08:37,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 15:08:37,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 15:08:37,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 15:08:37,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@747e114f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37, skipping insertion in model container [2021-10-07 15:08:37,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 15:08:37,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 15:08:37,584 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[2728,2741] [2021-10-07 15:08:37,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:08:37,600 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 15:08:37,636 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[2728,2741] [2021-10-07 15:08:37,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 15:08:37,667 INFO L208 MainTranslator]: Completed translation [2021-10-07 15:08:37,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37 WrapperNode [2021-10-07 15:08:37,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 15:08:37,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 15:08:37,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 15:08:37,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 15:08:37,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 15:08:37,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 15:08:37,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 15:08:37,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 15:08:37,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 15:08:37,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 15:08:37,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 15:08:37,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 15:08:37,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (1/1) ... [2021-10-07 15:08:37,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 15:08:37,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:37,823 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) [2021-10-07 15:08:37,845 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 [2021-10-07 15:08:37,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 15:08:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 15:08:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 15:08:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 15:08:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 15:08:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 15:08:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-07 15:08:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 15:08:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-07 15:08:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 15:08:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 15:08:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-07 15:08:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 15:08:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 15:08:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-07 15:08:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 15:08:37,892 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-07 15:08:38,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 15:08:38,619 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-07 15:08:38,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:08:38 BoogieIcfgContainer [2021-10-07 15:08:38,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 15:08:38,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 15:08:38,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 15:08:38,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 15:08:38,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:08:37" (1/3) ... [2021-10-07 15:08:38,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4b20ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:08:38, skipping insertion in model container [2021-10-07 15:08:38,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:08:37" (2/3) ... [2021-10-07 15:08:38,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4b20ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:08:38, skipping insertion in model container [2021-10-07 15:08:38,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:08:38" (3/3) ... [2021-10-07 15:08:38,634 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2021-10-07 15:08:38,642 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-07 15:08:38,642 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 15:08:38,642 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-07 15:08:38,643 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 15:08:38,686 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,686 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,687 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,687 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,687 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,687 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,688 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,688 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,688 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,688 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,689 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,689 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,689 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,690 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,690 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,690 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,690 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,691 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,691 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,691 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,691 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,692 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,692 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,692 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,693 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,693 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,693 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,693 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,693 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,694 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,694 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,694 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,694 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,695 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,695 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,695 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,695 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,695 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,696 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,696 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,697 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,697 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,698 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,698 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,699 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,699 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,699 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,699 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,700 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,700 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,700 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,701 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,701 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,701 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,702 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,702 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,703 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,703 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,703 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,704 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,704 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,704 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,704 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,705 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,705 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,705 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,705 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,706 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,706 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,706 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,707 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,707 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,707 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,707 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,708 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,708 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,708 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,708 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,708 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,709 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,709 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,709 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,710 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,710 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,710 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,710 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,711 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,711 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,711 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,711 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,712 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,712 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,712 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,712 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,713 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,713 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,713 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,713 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,714 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,714 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,714 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,714 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,714 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,715 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,715 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,715 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,715 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,716 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,716 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,716 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,716 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,716 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,717 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,720 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,721 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,721 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,721 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,721 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,731 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,732 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,732 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,732 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,733 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,733 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,741 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,743 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,743 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,744 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~b~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,744 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,744 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,744 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,744 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,745 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,749 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,750 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 15:08:38,765 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 15:08:38,864 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 15:08:38,889 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 [2021-10-07 15:08:38,890 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-07 15:08:38,924 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 15:08:38,938 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 137 transitions, 298 flow [2021-10-07 15:08:38,943 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 137 transitions, 298 flow [2021-10-07 15:08:38,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 137 places, 137 transitions, 298 flow [2021-10-07 15:08:39,090 INFO L129 PetriNetUnfolder]: 10/134 cut-off events. [2021-10-07 15:08:39,090 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 15:08:39,099 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 134 events. 10/134 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 133 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2021-10-07 15:08:39,107 INFO L116 LiptonReduction]: Number of co-enabled transitions 1464 [2021-10-07 15:08:46,165 INFO L131 LiptonReduction]: Checked pairs total: 5168 [2021-10-07 15:08:46,165 INFO L133 LiptonReduction]: Total number of compositions: 126 [2021-10-07 15:08:46,180 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 38 transitions, 100 flow [2021-10-07 15:08:46,220 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 425 states, 398 states have (on average 3.2185929648241207) internal successors, (1281), 424 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 425 states, 398 states have (on average 3.2185929648241207) internal successors, (1281), 424 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-07 15:08:46,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:46,231 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-07 15:08:46,232 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:46,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash 19573, now seen corresponding path program 1 times [2021-10-07 15:08:46,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:46,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469155488] [2021-10-07 15:08:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:46,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:46,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:46,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469155488] [2021-10-07 15:08:46,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469155488] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:46,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:46,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-07 15:08:46,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742802791] [2021-10-07 15:08:46,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:46,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:46,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:46,495 INFO L87 Difference]: Start difference. First operand has 425 states, 398 states have (on average 3.2185929648241207) internal successors, (1281), 424 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:46,565 INFO L93 Difference]: Finished difference Result 735 states and 2215 transitions. [2021-10-07 15:08:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:46,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-10-07 15:08:46,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:46,608 INFO L225 Difference]: With dead ends: 735 [2021-10-07 15:08:46,608 INFO L226 Difference]: Without dead ends: 731 [2021-10-07 15:08:46,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-10-07 15:08:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 368. [2021-10-07 15:08:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 347 states have (on average 3.1873198847262247) internal successors, (1106), 367 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1106 transitions. [2021-10-07 15:08:46,728 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1106 transitions. Word has length 2 [2021-10-07 15:08:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:46,729 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1106 transitions. [2021-10-07 15:08:46,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1106 transitions. [2021-10-07 15:08:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:08:46,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:46,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:08:46,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-07 15:08:46,732 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 607302, now seen corresponding path program 1 times [2021-10-07 15:08:46,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:46,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106540822] [2021-10-07 15:08:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:46,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:46,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:46,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106540822] [2021-10-07 15:08:46,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106540822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:46,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305264146] [2021-10-07 15:08:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:46,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:46,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:46,864 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) [2021-10-07 15:08:46,866 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 [2021-10-07 15:08:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:46,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:08:46,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:46,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305264146] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:46,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:46,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2021-10-07 15:08:46,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712964752] [2021-10-07 15:08:46,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:08:46,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:46,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:08:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:46,980 INFO L87 Difference]: Start difference. First operand 368 states and 1106 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:47,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:47,016 INFO L93 Difference]: Finished difference Result 730 states and 2204 transitions. [2021-10-07 15:08:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:08:47,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 15:08:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:47,025 INFO L225 Difference]: With dead ends: 730 [2021-10-07 15:08:47,025 INFO L226 Difference]: Without dead ends: 730 [2021-10-07 15:08:47,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-10-07 15:08:47,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 367. [2021-10-07 15:08:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 347 states have (on average 3.1844380403458215) internal successors, (1105), 366 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1105 transitions. [2021-10-07 15:08:47,051 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1105 transitions. Word has length 3 [2021-10-07 15:08:47,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:47,051 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1105 transitions. [2021-10-07 15:08:47,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1105 transitions. [2021-10-07 15:08:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-07 15:08:47,052 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:47,052 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-07 15:08:47,101 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 [2021-10-07 15:08:47,267 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 [2021-10-07 15:08:47,268 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:47,269 INFO L82 PathProgramCache]: Analyzing trace with hash 607286, now seen corresponding path program 1 times [2021-10-07 15:08:47,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:47,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092656343] [2021-10-07 15:08:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:47,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:47,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:47,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092656343] [2021-10-07 15:08:47,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092656343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:47,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904768310] [2021-10-07 15:08:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:47,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:47,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:47,362 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) [2021-10-07 15:08:47,384 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 [2021-10-07 15:08:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-07 15:08:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:47,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904768310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:47,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:47,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2021-10-07 15:08:47,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479625028] [2021-10-07 15:08:47,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 15:08:47,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 15:08:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:47,471 INFO L87 Difference]: Start difference. First operand 367 states and 1105 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:47,517 INFO L93 Difference]: Finished difference Result 1094 states and 3305 transitions. [2021-10-07 15:08:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:08:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-07 15:08:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:47,531 INFO L225 Difference]: With dead ends: 1094 [2021-10-07 15:08:47,533 INFO L226 Difference]: Without dead ends: 1094 [2021-10-07 15:08:47,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-10-07 15:08:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 368. [2021-10-07 15:08:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 348 states have (on average 3.1810344827586206) internal successors, (1107), 367 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1107 transitions. [2021-10-07 15:08:47,564 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1107 transitions. Word has length 3 [2021-10-07 15:08:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:47,564 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1107 transitions. [2021-10-07 15:08:47,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1107 transitions. [2021-10-07 15:08:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 15:08:47,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:47,565 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1] [2021-10-07 15:08:47,606 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 [2021-10-07 15:08:47,779 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 [2021-10-07 15:08:47,780 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:47,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash 18826885, now seen corresponding path program 2 times [2021-10-07 15:08:47,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:47,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457012226] [2021-10-07 15:08:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:47,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:47,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:47,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457012226] [2021-10-07 15:08:47,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457012226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:47,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529810850] [2021-10-07 15:08:47,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:08:47,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:47,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:47,881 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) [2021-10-07 15:08:47,886 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 [2021-10-07 15:08:47,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 15:08:47,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-07 15:08:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:47,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529810850] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:47,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:47,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2021-10-07 15:08:47,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684327288] [2021-10-07 15:08:47,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:47,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:08:47,956 INFO L87 Difference]: Start difference. First operand 368 states and 1107 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:47,964 INFO L93 Difference]: Finished difference Result 367 states and 1106 transitions. [2021-10-07 15:08:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 15:08:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:47,969 INFO L225 Difference]: With dead ends: 367 [2021-10-07 15:08:47,969 INFO L226 Difference]: Without dead ends: 367 [2021-10-07 15:08:47,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:08:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-07 15:08:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-10-07 15:08:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 346 states have (on average 3.184971098265896) internal successors, (1102), 364 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1102 transitions. [2021-10-07 15:08:47,985 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1102 transitions. Word has length 4 [2021-10-07 15:08:47,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:47,985 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 1102 transitions. [2021-10-07 15:08:47,985 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) [2021-10-07 15:08:47,985 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1102 transitions. [2021-10-07 15:08:47,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-07 15:08:47,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:47,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-07 15:08:48,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-07 15:08:48,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:48,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:48,202 INFO L82 PathProgramCache]: Analyzing trace with hash 583663210, now seen corresponding path program 1 times [2021-10-07 15:08:48,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:48,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865051271] [2021-10-07 15:08:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:48,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:48,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:48,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865051271] [2021-10-07 15:08:48,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865051271] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:48,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:48,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-07 15:08:48,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372240091] [2021-10-07 15:08:48,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:48,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:48,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:48,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:48,298 INFO L87 Difference]: Start difference. First operand 365 states and 1102 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:48,351 INFO L93 Difference]: Finished difference Result 463 states and 1366 transitions. [2021-10-07 15:08:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:48,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-07 15:08:48,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:48,356 INFO L225 Difference]: With dead ends: 463 [2021-10-07 15:08:48,356 INFO L226 Difference]: Without dead ends: 451 [2021-10-07 15:08:48,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-07 15:08:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 401. [2021-10-07 15:08:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 378 states have (on average 3.164021164021164) internal successors, (1196), 400 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1196 transitions. [2021-10-07 15:08:48,372 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1196 transitions. Word has length 5 [2021-10-07 15:08:48,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:48,373 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1196 transitions. [2021-10-07 15:08:48,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:48,373 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1196 transitions. [2021-10-07 15:08:48,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:08:48,375 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:48,375 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:48,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-07 15:08:48,375 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:48,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2023010527, now seen corresponding path program 1 times [2021-10-07 15:08:48,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:48,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342834362] [2021-10-07 15:08:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:48,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:48,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:48,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:48,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342834362] [2021-10-07 15:08:48,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342834362] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:48,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:48,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-07 15:08:48,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033571369] [2021-10-07 15:08:48,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 15:08:48,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 15:08:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:48,491 INFO L87 Difference]: Start difference. First operand 401 states and 1196 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-10-07 15:08:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:48,614 INFO L93 Difference]: Finished difference Result 555 states and 1625 transitions. [2021-10-07 15:08:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 15:08:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 15:08:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:48,620 INFO L225 Difference]: With dead ends: 555 [2021-10-07 15:08:48,621 INFO L226 Difference]: Without dead ends: 543 [2021-10-07 15:08:48,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:08:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-10-07 15:08:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 475. [2021-10-07 15:08:48,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 452 states have (on average 3.1570796460176993) internal successors, (1427), 474 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1427 transitions. [2021-10-07 15:08:48,642 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1427 transitions. Word has length 8 [2021-10-07 15:08:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:48,644 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 1427 transitions. [2021-10-07 15:08:48,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-10-07 15:08:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1427 transitions. [2021-10-07 15:08:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 15:08:48,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:48,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:48,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-07 15:08:48,646 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:48,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2023010528, now seen corresponding path program 1 times [2021-10-07 15:08:48,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:48,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216518027] [2021-10-07 15:08:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:48,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:48,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:48,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216518027] [2021-10-07 15:08:48,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216518027] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:48,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:48,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-07 15:08:48,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756926562] [2021-10-07 15:08:48,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:48,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:48,681 INFO L87 Difference]: Start difference. First operand 475 states and 1427 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:48,704 INFO L93 Difference]: Finished difference Result 395 states and 1171 transitions. [2021-10-07 15:08:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:48,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-07 15:08:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:48,708 INFO L225 Difference]: With dead ends: 395 [2021-10-07 15:08:48,708 INFO L226 Difference]: Without dead ends: 322 [2021-10-07 15:08:48,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-10-07 15:08:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-10-07 15:08:48,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 309 states have (on average 3.1877022653721685) internal successors, (985), 321 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 985 transitions. [2021-10-07 15:08:48,721 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 985 transitions. Word has length 8 [2021-10-07 15:08:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:48,722 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 985 transitions. [2021-10-07 15:08:48,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 985 transitions. [2021-10-07 15:08:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 15:08:48,723 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:48,723 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:48,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-07 15:08:48,724 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1514223632, now seen corresponding path program 1 times [2021-10-07 15:08:48,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:48,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351472701] [2021-10-07 15:08:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:48,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:48,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:48,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351472701] [2021-10-07 15:08:48,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351472701] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:48,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867142964] [2021-10-07 15:08:48,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:48,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:48,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:48,853 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) [2021-10-07 15:08:48,874 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 [2021-10-07 15:08:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:08:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:08:49,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867142964] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:49,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:49,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2021-10-07 15:08:49,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204422661] [2021-10-07 15:08:49,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:08:49,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:49,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:08:49,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-07 15:08:49,035 INFO L87 Difference]: Start difference. First operand 322 states and 985 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:49,089 INFO L93 Difference]: Finished difference Result 194 states and 599 transitions. [2021-10-07 15:08:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:08:49,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-07 15:08:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:49,091 INFO L225 Difference]: With dead ends: 194 [2021-10-07 15:08:49,091 INFO L226 Difference]: Without dead ends: 152 [2021-10-07 15:08:49,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:08:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-07 15:08:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-10-07 15:08:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 150 states have (on average 3.033333333333333) internal successors, (455), 151 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 455 transitions. [2021-10-07 15:08:49,099 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 455 transitions. Word has length 9 [2021-10-07 15:08:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:49,100 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 455 transitions. [2021-10-07 15:08:49,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 455 transitions. [2021-10-07 15:08:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 15:08:49,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:49,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:49,141 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 [2021-10-07 15:08:49,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:49,316 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:49,317 INFO L82 PathProgramCache]: Analyzing trace with hash -137335019, now seen corresponding path program 1 times [2021-10-07 15:08:49,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:49,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650575083] [2021-10-07 15:08:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:49,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:08:49,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:49,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650575083] [2021-10-07 15:08:49,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650575083] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:49,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:49,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-07 15:08:49,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005263710] [2021-10-07 15:08:49,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:08:49,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:49,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:08:49,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:49,357 INFO L87 Difference]: Start difference. First operand 152 states and 455 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-10-07 15:08:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:49,365 INFO L93 Difference]: Finished difference Result 248 states and 731 transitions. [2021-10-07 15:08:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:08:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11 [2021-10-07 15:08:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:49,368 INFO L225 Difference]: With dead ends: 248 [2021-10-07 15:08:49,369 INFO L226 Difference]: Without dead ends: 236 [2021-10-07 15:08:49,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:08:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-07 15:08:49,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 188. [2021-10-07 15:08:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 3.157608695652174) internal successors, (581), 187 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 581 transitions. [2021-10-07 15:08:49,377 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 581 transitions. Word has length 11 [2021-10-07 15:08:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:49,378 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 581 transitions. [2021-10-07 15:08:49,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-10-07 15:08:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 581 transitions. [2021-10-07 15:08:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 15:08:49,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:49,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:49,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-07 15:08:49,380 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash -137307119, now seen corresponding path program 1 times [2021-10-07 15:08:49,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:49,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088691273] [2021-10-07 15:08:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:49,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:49,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:49,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088691273] [2021-10-07 15:08:49,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088691273] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:49,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023083948] [2021-10-07 15:08:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:49,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:49,724 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) [2021-10-07 15:08:49,726 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 [2021-10-07 15:08:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:49,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-07 15:08:49,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:49,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-07 15:08:49,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:08:50,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:08:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:50,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023083948] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:50,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:50,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-07 15:08:50,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839592997] [2021-10-07 15:08:50,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:08:50,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:50,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:08:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:08:50,231 INFO L87 Difference]: Start difference. First operand 188 states and 581 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:51,216 INFO L93 Difference]: Finished difference Result 604 states and 1885 transitions. [2021-10-07 15:08:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:08:51,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 15:08:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:51,223 INFO L225 Difference]: With dead ends: 604 [2021-10-07 15:08:51,223 INFO L226 Difference]: Without dead ends: 604 [2021-10-07 15:08:51,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 844.8ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:08:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-10-07 15:08:51,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 388. [2021-10-07 15:08:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 384 states have (on average 3.5078125) internal successors, (1347), 387 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1347 transitions. [2021-10-07 15:08:51,245 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1347 transitions. Word has length 11 [2021-10-07 15:08:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:51,246 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1347 transitions. [2021-10-07 15:08:51,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1347 transitions. [2021-10-07 15:08:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:08:51,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:51,248 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:51,288 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 [2021-10-07 15:08:51,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:51,463 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash -857530528, now seen corresponding path program 2 times [2021-10-07 15:08:51,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:51,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486861660] [2021-10-07 15:08:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:51,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:51,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:51,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486861660] [2021-10-07 15:08:51,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486861660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:51,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613604905] [2021-10-07 15:08:51,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:08:51,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:51,923 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) [2021-10-07 15:08:51,947 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 [2021-10-07 15:08:52,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-07 15:08:52,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:52,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:08:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:52,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613604905] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:52,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:52,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2021-10-07 15:08:52,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630585539] [2021-10-07 15:08:52,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:08:52,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:08:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:08:52,153 INFO L87 Difference]: Start difference. First operand 388 states and 1347 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-10-07 15:08:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:52,205 INFO L93 Difference]: Finished difference Result 518 states and 1778 transitions. [2021-10-07 15:08:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:08:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-10-07 15:08:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:52,211 INFO L225 Difference]: With dead ends: 518 [2021-10-07 15:08:52,212 INFO L226 Difference]: Without dead ends: 518 [2021-10-07 15:08:52,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-07 15:08:52,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-10-07 15:08:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 388. [2021-10-07 15:08:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 384 states have (on average 3.5078125) internal successors, (1347), 387 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1347 transitions. [2021-10-07 15:08:52,231 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1347 transitions. Word has length 12 [2021-10-07 15:08:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:52,232 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1347 transitions. [2021-10-07 15:08:52,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-10-07 15:08:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1347 transitions. [2021-10-07 15:08:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:08:52,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:52,233 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:52,269 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 [2021-10-07 15:08:52,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-07 15:08:52,447 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash -857530527, now seen corresponding path program 1 times [2021-10-07 15:08:52,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:52,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784529344] [2021-10-07 15:08:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:52,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:52,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:52,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:52,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784529344] [2021-10-07 15:08:52,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784529344] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:52,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:52,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 15:08:52,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054725990] [2021-10-07 15:08:52,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:08:52,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:52,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:08:52,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:08:52,532 INFO L87 Difference]: Start difference. First operand 388 states and 1347 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-10-07 15:08:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:52,580 INFO L93 Difference]: Finished difference Result 460 states and 1572 transitions. [2021-10-07 15:08:52,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:08:52,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-10-07 15:08:52,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:52,586 INFO L225 Difference]: With dead ends: 460 [2021-10-07 15:08:52,586 INFO L226 Difference]: Without dead ends: 460 [2021-10-07 15:08:52,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 15:08:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-10-07 15:08:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 458. [2021-10-07 15:08:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 454 states have (on average 3.4537444933920707) internal successors, (1568), 457 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1568 transitions. [2021-10-07 15:08:52,606 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1568 transitions. Word has length 12 [2021-10-07 15:08:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:52,607 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1568 transitions. [2021-10-07 15:08:52,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-10-07 15:08:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1568 transitions. [2021-10-07 15:08:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-07 15:08:52,608 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:52,608 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:52,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-07 15:08:52,609 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash 38451458, now seen corresponding path program 1 times [2021-10-07 15:08:52,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:52,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972954742] [2021-10-07 15:08:52,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:52,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:08:52,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:52,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972954742] [2021-10-07 15:08:52,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972954742] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:52,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:08:52,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-07 15:08:52,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37676458] [2021-10-07 15:08:52,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:08:52,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:08:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:08:52,701 INFO L87 Difference]: Start difference. First operand 458 states and 1568 transitions. Second operand has 6 states, 5 states have (on average 2.4) 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) [2021-10-07 15:08:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:52,790 INFO L93 Difference]: Finished difference Result 518 states and 1768 transitions. [2021-10-07 15:08:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:08:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) 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 [2021-10-07 15:08:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:52,797 INFO L225 Difference]: With dead ends: 518 [2021-10-07 15:08:52,797 INFO L226 Difference]: Without dead ends: 518 [2021-10-07 15:08:52,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-07 15:08:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-10-07 15:08:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 458. [2021-10-07 15:08:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 454 states have (on average 3.4537444933920707) internal successors, (1568), 457 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1568 transitions. [2021-10-07 15:08:52,818 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1568 transitions. Word has length 12 [2021-10-07 15:08:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:52,819 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1568 transitions. [2021-10-07 15:08:52,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) 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) [2021-10-07 15:08:52,819 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1568 transitions. [2021-10-07 15:08:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 15:08:52,820 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:52,820 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:52,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-07 15:08:52,821 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1191861975, now seen corresponding path program 1 times [2021-10-07 15:08:52,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:52,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190483708] [2021-10-07 15:08:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:52,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:08:52,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:52,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190483708] [2021-10-07 15:08:52,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190483708] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:52,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824292209] [2021-10-07 15:08:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:52,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:52,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:52,875 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) [2021-10-07 15:08:52,898 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 [2021-10-07 15:08:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:52,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-07 15:08:52,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 15:08:53,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824292209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:08:53,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-07 15:08:53,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2021-10-07 15:08:53,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519380090] [2021-10-07 15:08:53,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 15:08:53,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 15:08:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:53,013 INFO L87 Difference]: Start difference. First operand 458 states and 1568 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-10-07 15:08:53,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:53,057 INFO L93 Difference]: Finished difference Result 818 states and 2756 transitions. [2021-10-07 15:08:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 15:08:53,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 13 [2021-10-07 15:08:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:53,066 INFO L225 Difference]: With dead ends: 818 [2021-10-07 15:08:53,066 INFO L226 Difference]: Without dead ends: 782 [2021-10-07 15:08:53,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-07 15:08:53,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-10-07 15:08:53,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 710. [2021-10-07 15:08:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 706 states have (on average 3.453257790368272) internal successors, (2438), 709 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2438 transitions. [2021-10-07 15:08:53,106 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2438 transitions. Word has length 13 [2021-10-07 15:08:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:53,106 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 2438 transitions. [2021-10-07 15:08:53,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-10-07 15:08:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2438 transitions. [2021-10-07 15:08:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 15:08:53,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:53,108 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:53,145 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 [2021-10-07 15:08:53,322 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,SelfDestructingSolverStorable13 [2021-10-07 15:08:53,323 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:53,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1278822384, now seen corresponding path program 1 times [2021-10-07 15:08:53,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:53,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283935800] [2021-10-07 15:08:53,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:53,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:53,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:53,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283935800] [2021-10-07 15:08:53,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283935800] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:53,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859199692] [2021-10-07 15:08:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:53,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:53,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:53,423 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) [2021-10-07 15:08:53,447 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 [2021-10-07 15:08:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-07 15:08:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:08:53,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859199692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:53,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:53,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2021-10-07 15:08:53,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817753011] [2021-10-07 15:08:53,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-07 15:08:53,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-07 15:08:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:08:53,676 INFO L87 Difference]: Start difference. First operand 710 states and 2438 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:54,042 INFO L93 Difference]: Finished difference Result 850 states and 2491 transitions. [2021-10-07 15:08:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:08:54,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 15:08:54,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:54,047 INFO L225 Difference]: With dead ends: 850 [2021-10-07 15:08:54,047 INFO L226 Difference]: Without dead ends: 417 [2021-10-07 15:08:54,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:08:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-10-07 15:08:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2021-10-07 15:08:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 413 states have (on average 3.3268765133171914) internal successors, (1374), 416 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1374 transitions. [2021-10-07 15:08:54,065 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1374 transitions. Word has length 15 [2021-10-07 15:08:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1374 transitions. [2021-10-07 15:08:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1374 transitions. [2021-10-07 15:08:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:08:54,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:54,067 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:54,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-07 15:08:54,281 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,SelfDestructingSolverStorable14 [2021-10-07 15:08:54,281 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1683536863, now seen corresponding path program 2 times [2021-10-07 15:08:54,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:54,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951546898] [2021-10-07 15:08:54,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:54,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:54,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:54,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951546898] [2021-10-07 15:08:54,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951546898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:54,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389046543] [2021-10-07 15:08:54,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:08:54,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:54,434 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) [2021-10-07 15:08:54,440 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 [2021-10-07 15:08:54,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:08:54,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-07 15:08:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:54,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:08:54,594 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-07 15:08:54,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 587 treesize of output 539 [2021-10-07 15:08:54,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:08:54,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:08:54,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:08:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:55,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389046543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:55,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:55,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 12 [2021-10-07 15:08:55,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272908199] [2021-10-07 15:08:55,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:08:55,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:55,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:08:55,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:08:55,059 INFO L87 Difference]: Start difference. First operand 417 states and 1374 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:55,975 INFO L93 Difference]: Finished difference Result 1271 states and 3981 transitions. [2021-10-07 15:08:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 15:08:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-10-07 15:08:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:55,990 INFO L225 Difference]: With dead ends: 1271 [2021-10-07 15:08:55,990 INFO L226 Difference]: Without dead ends: 1251 [2021-10-07 15:08:55,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 536.7ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:08:55,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-10-07 15:08:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 967. [2021-10-07 15:08:56,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 963 states have (on average 3.411214953271028) internal successors, (3285), 966 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3285 transitions. [2021-10-07 15:08:56,058 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3285 transitions. Word has length 16 [2021-10-07 15:08:56,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:56,059 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 3285 transitions. [2021-10-07 15:08:56,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3285 transitions. [2021-10-07 15:08:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:08:56,061 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:56,062 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:56,097 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 [2021-10-07 15:08:56,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:56,276 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:56,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:56,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1683536864, now seen corresponding path program 1 times [2021-10-07 15:08:56,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:56,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102535727] [2021-10-07 15:08:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:56,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:56,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:56,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102535727] [2021-10-07 15:08:56,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102535727] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:56,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774471937] [2021-10-07 15:08:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:56,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:56,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:56,406 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) [2021-10-07 15:08:56,413 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 [2021-10-07 15:08:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:56,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-07 15:08:56,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:08:56,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774471937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:56,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:56,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 11 [2021-10-07 15:08:56,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937719134] [2021-10-07 15:08:56,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:08:56,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:56,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:08:56,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:08:56,938 INFO L87 Difference]: Start difference. First operand 967 states and 3285 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:08:57,451 INFO L93 Difference]: Finished difference Result 1197 states and 3856 transitions. [2021-10-07 15:08:57,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 15:08:57,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-10-07 15:08:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:08:57,463 INFO L225 Difference]: With dead ends: 1197 [2021-10-07 15:08:57,463 INFO L226 Difference]: Without dead ends: 1137 [2021-10-07 15:08:57,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-10-07 15:08:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-10-07 15:08:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 977. [2021-10-07 15:08:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 973 states have (on average 3.2949640287769784) internal successors, (3206), 976 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 3206 transitions. [2021-10-07 15:08:57,506 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 3206 transitions. Word has length 16 [2021-10-07 15:08:57,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:08:57,506 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 3206 transitions. [2021-10-07 15:08:57,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:08:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 3206 transitions. [2021-10-07 15:08:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:08:57,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:08:57,509 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:08:57,544 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 [2021-10-07 15:08:57,723 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,SelfDestructingSolverStorable16 [2021-10-07 15:08:57,724 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:08:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:08:57,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1687500523, now seen corresponding path program 3 times [2021-10-07 15:08:57,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:08:57,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123057333] [2021-10-07 15:08:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:08:57,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:08:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:08:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:08:57,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:08:57,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123057333] [2021-10-07 15:08:57,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123057333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:57,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360355779] [2021-10-07 15:08:57,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:08:57,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:08:57,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:08:57,802 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) [2021-10-07 15:08:57,834 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 [2021-10-07 15:08:57,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:08:57,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:08:57,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-07 15:08:57,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:08:58,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:08:58,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:08:58,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:08:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:08:58,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360355779] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:08:58,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:08:58,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 12 [2021-10-07 15:08:58,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932059086] [2021-10-07 15:08:58,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:08:58,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:08:58,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:08:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:08:58,405 INFO L87 Difference]: Start difference. First operand 977 states and 3206 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:00,401 INFO L93 Difference]: Finished difference Result 3173 states and 10158 transitions. [2021-10-07 15:09:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-07 15:09:00,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-10-07 15:09:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:00,435 INFO L225 Difference]: With dead ends: 3173 [2021-10-07 15:09:00,435 INFO L226 Difference]: Without dead ends: 3091 [2021-10-07 15:09:00,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1299.6ms TimeCoverageRelationStatistics Valid=356, Invalid=1450, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:09:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-10-07 15:09:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 1843. [2021-10-07 15:09:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1839 states have (on average 3.612289287656335) internal successors, (6643), 1842 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 6643 transitions. [2021-10-07 15:09:00,545 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 6643 transitions. Word has length 16 [2021-10-07 15:09:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:00,546 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 6643 transitions. [2021-10-07 15:09:00,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 6643 transitions. [2021-10-07 15:09:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:09:00,548 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:00,548 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:00,593 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 [2021-10-07 15:09:00,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-07 15:09:00,762 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1687500524, now seen corresponding path program 2 times [2021-10-07 15:09:00,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:00,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687761268] [2021-10-07 15:09:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:00,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:00,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:00,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687761268] [2021-10-07 15:09:00,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687761268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:00,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067719138] [2021-10-07 15:09:00,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:09:00,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:00,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:00,898 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) [2021-10-07 15:09:00,905 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 [2021-10-07 15:09:01,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:09:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:01,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-07 15:09:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:01,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:09:01,295 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:01,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:09:01,395 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:01,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:09:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:01,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067719138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:01,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:01,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 11 [2021-10-07 15:09:01,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949830633] [2021-10-07 15:09:01,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-07 15:09:01,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-07 15:09:01,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-10-07 15:09:01,695 INFO L87 Difference]: Start difference. First operand 1843 states and 6643 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:02,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:02,561 INFO L93 Difference]: Finished difference Result 2327 states and 8199 transitions. [2021-10-07 15:09:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:09:02,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-10-07 15:09:02,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:02,600 INFO L225 Difference]: With dead ends: 2327 [2021-10-07 15:09:02,600 INFO L226 Difference]: Without dead ends: 2287 [2021-10-07 15:09:02,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:09:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-10-07 15:09:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2075. [2021-10-07 15:09:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2071 states have (on average 3.5924674070497344) internal successors, (7440), 2074 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 7440 transitions. [2021-10-07 15:09:02,686 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 7440 transitions. Word has length 16 [2021-10-07 15:09:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:02,686 INFO L470 AbstractCegarLoop]: Abstraction has 2075 states and 7440 transitions. [2021-10-07 15:09:02,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 7440 transitions. [2021-10-07 15:09:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-07 15:09:02,689 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:02,690 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:02,729 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 [2021-10-07 15:09:02,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:02,905 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:02,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1585600423, now seen corresponding path program 2 times [2021-10-07 15:09:02,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:02,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354842217] [2021-10-07 15:09:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:02,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:02,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:02,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354842217] [2021-10-07 15:09:02,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354842217] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 15:09:02,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 15:09:02,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-07 15:09:02,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248294938] [2021-10-07 15:09:02,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 15:09:02,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 15:09:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:09:02,961 INFO L87 Difference]: Start difference. First operand 2075 states and 7440 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:02,980 INFO L93 Difference]: Finished difference Result 2182 states and 7283 transitions. [2021-10-07 15:09:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 15:09:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-07 15:09:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:02,990 INFO L225 Difference]: With dead ends: 2182 [2021-10-07 15:09:02,991 INFO L226 Difference]: Without dead ends: 2072 [2021-10-07 15:09:02,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 15:09:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-10-07 15:09:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1866. [2021-10-07 15:09:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1860 states have (on average 3.4731182795698925) internal successors, (6460), 1865 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6460 transitions. [2021-10-07 15:09:03,059 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6460 transitions. Word has length 16 [2021-10-07 15:09:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:03,060 INFO L470 AbstractCegarLoop]: Abstraction has 1866 states and 6460 transitions. [2021-10-07 15:09:03,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6460 transitions. [2021-10-07 15:09:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:09:03,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:03,062 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:03,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-07 15:09:03,063 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash 778454453, now seen corresponding path program 1 times [2021-10-07 15:09:03,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:03,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235496849] [2021-10-07 15:09:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:03,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:03,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:03,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235496849] [2021-10-07 15:09:03,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235496849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:03,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013614407] [2021-10-07 15:09:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:03,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:03,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:03,215 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) [2021-10-07 15:09:03,238 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 [2021-10-07 15:09:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:03,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-07 15:09:03,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:03,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-07 15:09:03,689 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:09:03,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:09:03,839 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:09:03,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:09:04,119 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-10-07 15:09:04,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 52 [2021-10-07 15:09:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:04,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013614407] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:04,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:04,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-07 15:09:04,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943407757] [2021-10-07 15:09:04,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:09:04,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:04,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:09:04,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:09:04,328 INFO L87 Difference]: Start difference. First operand 1866 states and 6460 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:05,273 INFO L93 Difference]: Finished difference Result 2169 states and 7360 transitions. [2021-10-07 15:09:05,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:09:05,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-10-07 15:09:05,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:05,283 INFO L225 Difference]: With dead ends: 2169 [2021-10-07 15:09:05,283 INFO L226 Difference]: Without dead ends: 2149 [2021-10-07 15:09:05,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 722.0ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:09:05,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-10-07 15:09:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1996. [2021-10-07 15:09:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1990 states have (on average 3.4648241206030153) internal successors, (6895), 1995 states have internal predecessors, (6895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 6895 transitions. [2021-10-07 15:09:05,379 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 6895 transitions. Word has length 17 [2021-10-07 15:09:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:05,379 INFO L470 AbstractCegarLoop]: Abstraction has 1996 states and 6895 transitions. [2021-10-07 15:09:05,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 6895 transitions. [2021-10-07 15:09:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:09:05,382 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:05,382 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:05,425 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 [2021-10-07 15:09:05,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-07 15:09:05,597 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:05,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:05,598 INFO L82 PathProgramCache]: Analyzing trace with hash 782418113, now seen corresponding path program 2 times [2021-10-07 15:09:05,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:05,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454177387] [2021-10-07 15:09:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:05,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:05,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:05,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454177387] [2021-10-07 15:09:05,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454177387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:05,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19112848] [2021-10-07 15:09:05,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:09:05,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:05,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:05,754 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) [2021-10-07 15:09:05,776 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 [2021-10-07 15:09:05,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:09:05,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:05,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-07 15:09:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:06,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:09:06,185 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:06,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:09:06,303 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:09:06,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:09:06,521 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-10-07 15:09:06,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-10-07 15:09:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:06,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19112848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:06,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:06,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-07 15:09:06,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779055381] [2021-10-07 15:09:06,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:09:06,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:09:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:09:06,677 INFO L87 Difference]: Start difference. First operand 1996 states and 6895 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:07,567 INFO L93 Difference]: Finished difference Result 2597 states and 8681 transitions. [2021-10-07 15:09:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:09:07,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-10-07 15:09:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:07,578 INFO L225 Difference]: With dead ends: 2597 [2021-10-07 15:09:07,578 INFO L226 Difference]: Without dead ends: 2557 [2021-10-07 15:09:07,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 702.3ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:09:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-10-07 15:09:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2060. [2021-10-07 15:09:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2054 states have (on average 3.4581304771178187) internal successors, (7103), 2059 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 7103 transitions. [2021-10-07 15:09:07,662 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 7103 transitions. Word has length 17 [2021-10-07 15:09:07,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:07,663 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 7103 transitions. [2021-10-07 15:09:07,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:07,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 7103 transitions. [2021-10-07 15:09:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:09:07,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:07,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:07,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-07 15:09:07,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:07,882 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash 650040052, now seen corresponding path program 1 times [2021-10-07 15:09:07,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:07,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078080460] [2021-10-07 15:09:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:07,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:08,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:08,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078080460] [2021-10-07 15:09:08,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078080460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:08,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926388036] [2021-10-07 15:09:08,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:08,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:08,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:08,034 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) [2021-10-07 15:09:08,058 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 [2021-10-07 15:09:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:08,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-07 15:09:08,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:08,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:09:08,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:08,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:08,905 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-10-07 15:09:08,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 47 [2021-10-07 15:09:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:08,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926388036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:08,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:08,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 15 [2021-10-07 15:09:08,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218481223] [2021-10-07 15:09:08,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:09:08,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:09:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:09:08,952 INFO L87 Difference]: Start difference. First operand 2060 states and 7103 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:09,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:09,549 INFO L93 Difference]: Finished difference Result 2458 states and 8238 transitions. [2021-10-07 15:09:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-07 15:09:09,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-10-07 15:09:09,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:09,559 INFO L225 Difference]: With dead ends: 2458 [2021-10-07 15:09:09,560 INFO L226 Difference]: Without dead ends: 2438 [2021-10-07 15:09:09,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 517.6ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:09:09,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-10-07 15:09:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1974. [2021-10-07 15:09:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1968 states have (on average 3.4588414634146343) internal successors, (6807), 1973 states have internal predecessors, (6807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:09,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 6807 transitions. [2021-10-07 15:09:09,637 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 6807 transitions. Word has length 17 [2021-10-07 15:09:09,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:09,637 INFO L470 AbstractCegarLoop]: Abstraction has 1974 states and 6807 transitions. [2021-10-07 15:09:09,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 6807 transitions. [2021-10-07 15:09:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:09:09,640 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:09,640 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:09,686 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 [2021-10-07 15:09:09,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:09,855 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:09,856 INFO L82 PathProgramCache]: Analyzing trace with hash 650040053, now seen corresponding path program 3 times [2021-10-07 15:09:09,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:09,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143535388] [2021-10-07 15:09:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:09,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:10,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:10,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143535388] [2021-10-07 15:09:10,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143535388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:10,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604489585] [2021-10-07 15:09:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:09:10,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:10,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:10,029 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) [2021-10-07 15:09:10,031 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 [2021-10-07 15:09:10,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:09:10,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:10,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-07 15:09:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:10,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-07 15:09:10,510 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:09:10,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:09:10,652 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:09:10,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:09:11,297 INFO L354 Elim1Store]: treesize reduction 88, result has 20.7 percent of original size [2021-10-07 15:09:11,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 67 [2021-10-07 15:09:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:11,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604489585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:11,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:11,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 16 [2021-10-07 15:09:11,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145615349] [2021-10-07 15:09:11,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:09:11,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:09:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:09:11,386 INFO L87 Difference]: Start difference. First operand 1974 states and 6807 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:12,989 INFO L93 Difference]: Finished difference Result 3097 states and 10062 transitions. [2021-10-07 15:09:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:09:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-10-07 15:09:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:13,006 INFO L225 Difference]: With dead ends: 3097 [2021-10-07 15:09:13,007 INFO L226 Difference]: Without dead ends: 2999 [2021-10-07 15:09:13,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:09:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2999 states. [2021-10-07 15:09:13,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2999 to 2384. [2021-10-07 15:09:13,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2378 states have (on average 3.3990748528174937) internal successors, (8083), 2383 states have internal predecessors, (8083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 8083 transitions. [2021-10-07 15:09:13,113 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 8083 transitions. Word has length 17 [2021-10-07 15:09:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:13,114 INFO L470 AbstractCegarLoop]: Abstraction has 2384 states and 8083 transitions. [2021-10-07 15:09:13,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 8083 transitions. [2021-10-07 15:09:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:09:13,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:13,116 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:13,152 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 [2021-10-07 15:09:13,330 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,SelfDestructingSolverStorable23 [2021-10-07 15:09:13,331 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash 777055732, now seen corresponding path program 2 times [2021-10-07 15:09:13,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:13,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546482271] [2021-10-07 15:09:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:13,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:13,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:13,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546482271] [2021-10-07 15:09:13,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546482271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:13,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419238469] [2021-10-07 15:09:13,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:09:13,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:13,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:13,901 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) [2021-10-07 15:09:13,926 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 [2021-10-07 15:09:14,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:09:14,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-07 15:09:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:14,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:09:14,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:14,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:14,805 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-10-07 15:09:14,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-10-07 15:09:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:14,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419238469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:14,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:14,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-07 15:09:14,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969607081] [2021-10-07 15:09:14,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:09:14,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:14,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:09:14,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:09:14,981 INFO L87 Difference]: Start difference. First operand 2384 states and 8083 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:17,517 INFO L93 Difference]: Finished difference Result 4093 states and 13007 transitions. [2021-10-07 15:09:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:09:17,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:09:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:17,565 INFO L225 Difference]: With dead ends: 4093 [2021-10-07 15:09:17,565 INFO L226 Difference]: Without dead ends: 4043 [2021-10-07 15:09:17,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1871.1ms TimeCoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:09:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2021-10-07 15:09:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 2677. [2021-10-07 15:09:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2671 states have (on average 3.3908648446274805) internal successors, (9057), 2676 states have internal predecessors, (9057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 9057 transitions. [2021-10-07 15:09:17,687 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 9057 transitions. Word has length 17 [2021-10-07 15:09:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:17,688 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 9057 transitions. [2021-10-07 15:09:17,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 9057 transitions. [2021-10-07 15:09:17,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:09:17,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:17,690 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:17,742 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 [2021-10-07 15:09:17,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-07 15:09:17,905 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash 772913512, now seen corresponding path program 3 times [2021-10-07 15:09:17,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:17,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109378410] [2021-10-07 15:09:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:17,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:18,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:18,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109378410] [2021-10-07 15:09:18,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109378410] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:18,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094180243] [2021-10-07 15:09:18,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:09:18,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:18,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:18,305 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:18,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-07 15:09:18,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:09:18,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:18,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-07 15:09:18,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:18,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:09:18,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:18,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:19,234 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:09:19,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:09:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:19,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094180243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:19,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:19,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-07 15:09:19,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489903125] [2021-10-07 15:09:19,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:09:19,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:09:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:09:19,286 INFO L87 Difference]: Start difference. First operand 2677 states and 9057 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:22,891 INFO L93 Difference]: Finished difference Result 4555 states and 14800 transitions. [2021-10-07 15:09:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:09:22,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-07 15:09:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:22,911 INFO L225 Difference]: With dead ends: 4555 [2021-10-07 15:09:22,911 INFO L226 Difference]: Without dead ends: 4523 [2021-10-07 15:09:22,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 3032.9ms TimeCoverageRelationStatistics Valid=425, Invalid=1555, Unknown=0, NotChecked=0, Total=1980 [2021-10-07 15:09:22,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2021-10-07 15:09:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 2960. [2021-10-07 15:09:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2954 states have (on average 3.5091401489505754) internal successors, (10366), 2959 states have internal predecessors, (10366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 10366 transitions. [2021-10-07 15:09:23,059 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 10366 transitions. Word has length 17 [2021-10-07 15:09:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:23,059 INFO L470 AbstractCegarLoop]: Abstraction has 2960 states and 10366 transitions. [2021-10-07 15:09:23,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 10366 transitions. [2021-10-07 15:09:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-07 15:09:23,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:23,062 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:23,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:23,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:23,276 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:23,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:23,277 INFO L82 PathProgramCache]: Analyzing trace with hash 772913513, now seen corresponding path program 4 times [2021-10-07 15:09:23,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:23,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796236819] [2021-10-07 15:09:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:23,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:23,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:23,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796236819] [2021-10-07 15:09:23,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796236819] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:23,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440462625] [2021-10-07 15:09:23,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:09:23,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:23,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:23,468 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:23,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-07 15:09:23,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:09:23,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:23,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 15:09:23,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:23,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2021-10-07 15:09:24,220 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-10-07 15:09:24,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 46 [2021-10-07 15:09:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:24,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440462625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:24,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:24,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-07 15:09:24,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177608619] [2021-10-07 15:09:24,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:09:24,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:09:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:09:24,251 INFO L87 Difference]: Start difference. First operand 2960 states and 10366 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:24,595 INFO L93 Difference]: Finished difference Result 3425 states and 11751 transitions. [2021-10-07 15:09:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:09:24,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-10-07 15:09:24,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:24,611 INFO L225 Difference]: With dead ends: 3425 [2021-10-07 15:09:24,611 INFO L226 Difference]: Without dead ends: 3425 [2021-10-07 15:09:24,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:09:24,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-10-07 15:09:24,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 3128. [2021-10-07 15:09:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3122 states have (on average 3.5137732222934015) internal successors, (10970), 3127 states have internal predecessors, (10970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 10970 transitions. [2021-10-07 15:09:24,790 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 10970 transitions. Word has length 17 [2021-10-07 15:09:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:24,790 INFO L470 AbstractCegarLoop]: Abstraction has 3128 states and 10970 transitions. [2021-10-07 15:09:24,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 10970 transitions. [2021-10-07 15:09:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:09:24,793 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:24,793 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:24,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:24,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-07 15:09:24,994 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:24,995 INFO L82 PathProgramCache]: Analyzing trace with hash 40974851, now seen corresponding path program 4 times [2021-10-07 15:09:24,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:24,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084468686] [2021-10-07 15:09:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:24,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:09:25,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:25,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084468686] [2021-10-07 15:09:25,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084468686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:25,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926531129] [2021-10-07 15:09:25,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:09:25,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:25,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:25,192 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:25,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-07 15:09:25,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:09:25,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-07 15:09:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:25,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 104 [2021-10-07 15:09:25,765 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:09:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-07 15:09:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:25,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926531129] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:25,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:25,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-10-07 15:09:25,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873863272] [2021-10-07 15:09:25,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:09:25,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:25,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:09:25,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:09:25,783 INFO L87 Difference]: Start difference. First operand 3128 states and 10970 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2021-10-07 15:09:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:26,038 INFO L93 Difference]: Finished difference Result 4153 states and 14135 transitions. [2021-10-07 15:09:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-07 15:09:26,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 18 [2021-10-07 15:09:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:26,052 INFO L225 Difference]: With dead ends: 4153 [2021-10-07 15:09:26,053 INFO L226 Difference]: Without dead ends: 4153 [2021-10-07 15:09:26,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-07 15:09:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-10-07 15:09:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 3058. [2021-10-07 15:09:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3058 states, 3052 states have (on average 3.522280471821756) internal successors, (10750), 3057 states have internal predecessors, (10750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3058 states to 3058 states and 10750 transitions. [2021-10-07 15:09:26,169 INFO L78 Accepts]: Start accepts. Automaton has 3058 states and 10750 transitions. Word has length 18 [2021-10-07 15:09:26,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:26,169 INFO L470 AbstractCegarLoop]: Abstraction has 3058 states and 10750 transitions. [2021-10-07 15:09:26,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2021-10-07 15:09:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3058 states and 10750 transitions. [2021-10-07 15:09:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 15:09:26,172 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:26,172 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:26,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:26,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-07 15:09:26,388 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash 36832631, now seen corresponding path program 5 times [2021-10-07 15:09:26,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:26,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945728917] [2021-10-07 15:09:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:26,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:27,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:27,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945728917] [2021-10-07 15:09:27,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945728917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:27,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511580265] [2021-10-07 15:09:27,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:09:27,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:27,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:27,304 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:27,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-07 15:09:27,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:09:27,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:27,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-07 15:09:27,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:28,009 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:09:28,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-10-07 15:09:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:09:28,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511580265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:28,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:28,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2021-10-07 15:09:28,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329658787] [2021-10-07 15:09:28,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:09:28,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:28,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:09:28,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:09:28,047 INFO L87 Difference]: Start difference. First operand 3058 states and 10750 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:29,173 INFO L93 Difference]: Finished difference Result 4247 states and 14269 transitions. [2021-10-07 15:09:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:09:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 15:09:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:29,184 INFO L225 Difference]: With dead ends: 4247 [2021-10-07 15:09:29,184 INFO L226 Difference]: Without dead ends: 4247 [2021-10-07 15:09:29,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1062.4ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:09:29,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-10-07 15:09:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 2974. [2021-10-07 15:09:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2968 states have (on average 3.5212264150943398) internal successors, (10451), 2973 states have internal predecessors, (10451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 10451 transitions. [2021-10-07 15:09:29,326 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 10451 transitions. Word has length 18 [2021-10-07 15:09:29,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:29,327 INFO L470 AbstractCegarLoop]: Abstraction has 2974 states and 10451 transitions. [2021-10-07 15:09:29,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 10451 transitions. [2021-10-07 15:09:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-07 15:09:29,331 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:29,331 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:29,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:29,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-07 15:09:29,545 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1141678338, now seen corresponding path program 4 times [2021-10-07 15:09:29,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:29,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421119027] [2021-10-07 15:09:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:29,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:09:29,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:29,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421119027] [2021-10-07 15:09:29,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421119027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:29,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141948330] [2021-10-07 15:09:29,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:09:29,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:29,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:29,609 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:29,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-07 15:09:30,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:09:30,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:30,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 15:09:30,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-07 15:09:30,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141948330] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:30,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:30,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-10-07 15:09:30,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075390487] [2021-10-07 15:09:30,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:09:30,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:09:30,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:09:30,063 INFO L87 Difference]: Start difference. First operand 2974 states and 10451 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:30,140 INFO L93 Difference]: Finished difference Result 5295 states and 18287 transitions. [2021-10-07 15:09:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 15:09:30,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-07 15:09:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:30,154 INFO L225 Difference]: With dead ends: 5295 [2021-10-07 15:09:30,154 INFO L226 Difference]: Without dead ends: 5081 [2021-10-07 15:09:30,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:09:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2021-10-07 15:09:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4188. [2021-10-07 15:09:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4182 states have (on average 3.598517455762793) internal successors, (15049), 4187 states have internal predecessors, (15049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 15049 transitions. [2021-10-07 15:09:30,308 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 15049 transitions. Word has length 19 [2021-10-07 15:09:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:30,309 INFO L470 AbstractCegarLoop]: Abstraction has 4188 states and 15049 transitions. [2021-10-07 15:09:30,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 15049 transitions. [2021-10-07 15:09:30,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:09:30,313 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:30,313 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:30,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:30,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:30,529 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:30,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:30,529 INFO L82 PathProgramCache]: Analyzing trace with hash 544527207, now seen corresponding path program 3 times [2021-10-07 15:09:30,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:30,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284449868] [2021-10-07 15:09:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:30,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:09:30,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:30,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284449868] [2021-10-07 15:09:30,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284449868] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:30,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852489801] [2021-10-07 15:09:30,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:09:30,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:30,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:30,630 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:30,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-07 15:09:31,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-07 15:09:31,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-07 15:09:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:09:31,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852489801] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:31,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:31,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-10-07 15:09:31,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366943562] [2021-10-07 15:09:31,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:09:31,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:31,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:09:31,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:09:31,355 INFO L87 Difference]: Start difference. First operand 4188 states and 15049 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:32,228 INFO L93 Difference]: Finished difference Result 3783 states and 12059 transitions. [2021-10-07 15:09:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-07 15:09:32,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-07 15:09:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:32,236 INFO L225 Difference]: With dead ends: 3783 [2021-10-07 15:09:32,236 INFO L226 Difference]: Without dead ends: 3649 [2021-10-07 15:09:32,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:09:32,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3649 states. [2021-10-07 15:09:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3649 to 2470. [2021-10-07 15:09:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2464 states have (on average 3.330357142857143) internal successors, (8206), 2469 states have internal predecessors, (8206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8206 transitions. [2021-10-07 15:09:32,310 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8206 transitions. Word has length 20 [2021-10-07 15:09:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:32,311 INFO L470 AbstractCegarLoop]: Abstraction has 2470 states and 8206 transitions. [2021-10-07 15:09:32,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8206 transitions. [2021-10-07 15:09:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-07 15:09:32,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:32,314 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:32,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:32,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:32,527 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:32,528 INFO L82 PathProgramCache]: Analyzing trace with hash -314221517, now seen corresponding path program 4 times [2021-10-07 15:09:32,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:32,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085236079] [2021-10-07 15:09:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:32,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 15:09:32,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:32,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085236079] [2021-10-07 15:09:32,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085236079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:32,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861783320] [2021-10-07 15:09:32,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:09:32,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:32,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:32,625 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:32,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-07 15:09:33,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:09:33,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-07 15:09:33,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:09:33,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861783320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:33,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:33,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-10-07 15:09:33,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003876331] [2021-10-07 15:09:33,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-07 15:09:33,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:33,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-07 15:09:33,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:09:33,235 INFO L87 Difference]: Start difference. First operand 2470 states and 8206 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:33,616 INFO L93 Difference]: Finished difference Result 1479 states and 4693 transitions. [2021-10-07 15:09:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-07 15:09:33,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-07 15:09:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:33,619 INFO L225 Difference]: With dead ends: 1479 [2021-10-07 15:09:33,620 INFO L226 Difference]: Without dead ends: 1174 [2021-10-07 15:09:33,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:09:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-10-07 15:09:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1174. [2021-10-07 15:09:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1168 states have (on average 3.406678082191781) internal successors, (3979), 1173 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 3979 transitions. [2021-10-07 15:09:33,645 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 3979 transitions. Word has length 20 [2021-10-07 15:09:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:33,646 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 3979 transitions. [2021-10-07 15:09:33,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 3979 transitions. [2021-10-07 15:09:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:09:33,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:33,648 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:33,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-07 15:09:33,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-07 15:09:33,863 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:33,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:33,863 INFO L82 PathProgramCache]: Analyzing trace with hash 725262903, now seen corresponding path program 5 times [2021-10-07 15:09:33,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:33,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116838682] [2021-10-07 15:09:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:33,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:33,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:34,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:34,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116838682] [2021-10-07 15:09:34,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116838682] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:34,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268127066] [2021-10-07 15:09:34,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:09:34,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:34,570 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:34,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-07 15:09:34,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:09:34,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:34,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-07 15:09:34,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:35,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268127066] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:35,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:35,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-10-07 15:09:35,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596742885] [2021-10-07 15:09:35,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:09:35,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:09:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:09:35,770 INFO L87 Difference]: Start difference. First operand 1174 states and 3979 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:38,006 INFO L93 Difference]: Finished difference Result 3930 states and 12346 transitions. [2021-10-07 15:09:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:09:38,006 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:09:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:38,014 INFO L225 Difference]: With dead ends: 3930 [2021-10-07 15:09:38,014 INFO L226 Difference]: Without dead ends: 3516 [2021-10-07 15:09:38,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1862.7ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:09:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-10-07 15:09:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 2044. [2021-10-07 15:09:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2038 states have (on average 3.4313052011776253) internal successors, (6993), 2043 states have internal predecessors, (6993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 6993 transitions. [2021-10-07 15:09:38,073 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 6993 transitions. Word has length 21 [2021-10-07 15:09:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:38,073 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 6993 transitions. [2021-10-07 15:09:38,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 6993 transitions. [2021-10-07 15:09:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:09:38,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:38,076 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:38,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:38,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:38,290 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:38,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:38,291 INFO L82 PathProgramCache]: Analyzing trace with hash 725262904, now seen corresponding path program 5 times [2021-10-07 15:09:38,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:38,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173490845] [2021-10-07 15:09:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:38,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:38,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:38,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173490845] [2021-10-07 15:09:38,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173490845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:38,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419856228] [2021-10-07 15:09:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:09:38,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:38,868 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:38,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-07 15:09:39,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:09:39,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:39,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-07 15:09:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:40,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419856228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:40,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:40,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2021-10-07 15:09:40,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339520388] [2021-10-07 15:09:40,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:09:40,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:09:40,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:09:40,108 INFO L87 Difference]: Start difference. First operand 2044 states and 6993 transitions. Second operand has 25 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:43,058 INFO L93 Difference]: Finished difference Result 6617 states and 21487 transitions. [2021-10-07 15:09:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-07 15:09:43,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:09:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:43,074 INFO L225 Difference]: With dead ends: 6617 [2021-10-07 15:09:43,075 INFO L226 Difference]: Without dead ends: 6507 [2021-10-07 15:09:43,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 2384.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2822, Unknown=0, NotChecked=0, Total=3422 [2021-10-07 15:09:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6507 states. [2021-10-07 15:09:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6507 to 3644. [2021-10-07 15:09:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3638 states have (on average 3.6542056074766354) internal successors, (13294), 3643 states have internal predecessors, (13294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 13294 transitions. [2021-10-07 15:09:43,196 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 13294 transitions. Word has length 21 [2021-10-07 15:09:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:43,196 INFO L470 AbstractCegarLoop]: Abstraction has 3644 states and 13294 transitions. [2021-10-07 15:09:43,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 13294 transitions. [2021-10-07 15:09:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:09:43,201 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:43,201 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:43,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:43,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:43,414 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:43,415 INFO L82 PathProgramCache]: Analyzing trace with hash 853974903, now seen corresponding path program 6 times [2021-10-07 15:09:43,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:43,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514056822] [2021-10-07 15:09:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:43,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:44,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:44,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514056822] [2021-10-07 15:09:44,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514056822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:44,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624110400] [2021-10-07 15:09:44,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:09:44,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:44,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:44,191 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:44,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-07 15:09:44,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:09:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:44,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-07 15:09:44,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:44,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:09:44,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:45,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:45,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624110400] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:45,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:45,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-07 15:09:45,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205257550] [2021-10-07 15:09:45,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:09:45,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:45,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:09:45,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:09:45,775 INFO L87 Difference]: Start difference. First operand 3644 states and 13294 transitions. Second operand has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:47,825 INFO L93 Difference]: Finished difference Result 4344 states and 15562 transitions. [2021-10-07 15:09:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:09:47,825 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:09:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:47,836 INFO L225 Difference]: With dead ends: 4344 [2021-10-07 15:09:47,837 INFO L226 Difference]: Without dead ends: 4334 [2021-10-07 15:09:47,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1667.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:09:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4334 states. [2021-10-07 15:09:47,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4334 to 3784. [2021-10-07 15:09:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3778 states have (on average 3.6519322392800424) internal successors, (13797), 3783 states have internal predecessors, (13797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 13797 transitions. [2021-10-07 15:09:47,936 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 13797 transitions. Word has length 21 [2021-10-07 15:09:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:47,936 INFO L470 AbstractCegarLoop]: Abstraction has 3784 states and 13797 transitions. [2021-10-07 15:09:47,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 13797 transitions. [2021-10-07 15:09:47,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:09:47,940 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:47,940 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:47,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:48,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-07 15:09:48,156 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:48,156 INFO L82 PathProgramCache]: Analyzing trace with hash 853974904, now seen corresponding path program 6 times [2021-10-07 15:09:48,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:48,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040577376] [2021-10-07 15:09:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:48,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-07 15:09:48,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:48,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040577376] [2021-10-07 15:09:48,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040577376] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:48,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335493810] [2021-10-07 15:09:48,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:09:48,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:48,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:48,240 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:48,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-07 15:09:48,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:09:48,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:09:48,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-07 15:09:48,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:48,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:09:48,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:48,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:49,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335493810] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:49,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:49,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 12] total 16 [2021-10-07 15:09:49,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959576815] [2021-10-07 15:09:49,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:09:49,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:09:49,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:09:49,299 INFO L87 Difference]: Start difference. First operand 3784 states and 13797 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:51,552 INFO L93 Difference]: Finished difference Result 9656 states and 32827 transitions. [2021-10-07 15:09:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-07 15:09:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:09:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:51,576 INFO L225 Difference]: With dead ends: 9656 [2021-10-07 15:09:51,576 INFO L226 Difference]: Without dead ends: 9224 [2021-10-07 15:09:51,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1564.1ms TimeCoverageRelationStatistics Valid=412, Invalid=1658, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:09:51,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9224 states. [2021-10-07 15:09:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9224 to 5224. [2021-10-07 15:09:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5224 states, 5218 states have (on average 3.66903027980069) internal successors, (19145), 5223 states have internal predecessors, (19145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5224 states to 5224 states and 19145 transitions. [2021-10-07 15:09:51,721 INFO L78 Accepts]: Start accepts. Automaton has 5224 states and 19145 transitions. Word has length 21 [2021-10-07 15:09:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:51,722 INFO L470 AbstractCegarLoop]: Abstraction has 5224 states and 19145 transitions. [2021-10-07 15:09:51,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5224 states and 19145 transitions. [2021-10-07 15:09:51,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:09:51,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:51,726 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:51,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-07 15:09:51,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-07 15:09:51,941 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:51,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1936373571, now seen corresponding path program 7 times [2021-10-07 15:09:51,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:51,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249685328] [2021-10-07 15:09:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:51,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:09:52,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:52,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249685328] [2021-10-07 15:09:52,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249685328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:52,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404888585] [2021-10-07 15:09:52,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:09:52,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:52,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:52,094 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:52,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-07 15:09:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:52,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-07 15:09:52,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:52,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:09:52,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:09:52,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:52,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:09:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:53,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404888585] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:53,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:53,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 18 [2021-10-07 15:09:53,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823919574] [2021-10-07 15:09:53,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:09:53,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:09:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:09:53,680 INFO L87 Difference]: Start difference. First operand 5224 states and 19145 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:09:55,819 INFO L93 Difference]: Finished difference Result 11752 states and 39933 transitions. [2021-10-07 15:09:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 15:09:55,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:09:55,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:09:55,851 INFO L225 Difference]: With dead ends: 11752 [2021-10-07 15:09:55,851 INFO L226 Difference]: Without dead ends: 11500 [2021-10-07 15:09:55,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1490.5ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 15:09:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-10-07 15:09:56,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 7884. [2021-10-07 15:09:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 7878 states have (on average 3.7746890073622748) internal successors, (29737), 7883 states have internal predecessors, (29737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 29737 transitions. [2021-10-07 15:09:56,118 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 29737 transitions. Word has length 21 [2021-10-07 15:09:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:09:56,118 INFO L470 AbstractCegarLoop]: Abstraction has 7884 states and 29737 transitions. [2021-10-07 15:09:56,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:09:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 29737 transitions. [2021-10-07 15:09:56,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:09:56,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:09:56,123 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:09:56,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-10-07 15:09:56,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:56,338 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:09:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:09:56,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1936373572, now seen corresponding path program 7 times [2021-10-07 15:09:56,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:09:56,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865060225] [2021-10-07 15:09:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:09:56,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:09:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:56,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:09:56,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865060225] [2021-10-07 15:09:56,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865060225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:56,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201675543] [2021-10-07 15:09:56,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:09:56,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:09:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:09:56,765 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:09:56,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-07 15:09:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:09:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-07 15:09:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:09:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:09:57,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201675543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:09:57,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:09:57,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2021-10-07 15:09:57,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177182627] [2021-10-07 15:09:57,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:09:57,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:09:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:09:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:09:57,846 INFO L87 Difference]: Start difference. First operand 7884 states and 29737 transitions. Second operand has 25 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:01,127 INFO L93 Difference]: Finished difference Result 11485 states and 38367 transitions. [2021-10-07 15:10:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-07 15:10:01,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:10:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:01,156 INFO L225 Difference]: With dead ends: 11485 [2021-10-07 15:10:01,156 INFO L226 Difference]: Without dead ends: 11369 [2021-10-07 15:10:01,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 2239.9ms TimeCoverageRelationStatistics Valid=552, Invalid=3108, Unknown=0, NotChecked=0, Total=3660 [2021-10-07 15:10:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11369 states. [2021-10-07 15:10:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11369 to 5833. [2021-10-07 15:10:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5833 states, 5827 states have (on average 3.594130770550884) internal successors, (20943), 5832 states have internal predecessors, (20943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5833 states to 5833 states and 20943 transitions. [2021-10-07 15:10:01,487 INFO L78 Accepts]: Start accepts. Automaton has 5833 states and 20943 transitions. Word has length 21 [2021-10-07 15:10:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:01,487 INFO L470 AbstractCegarLoop]: Abstraction has 5833 states and 20943 transitions. [2021-10-07 15:10:01,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5833 states and 20943 transitions. [2021-10-07 15:10:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:10:01,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:01,492 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:01,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:01,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-07 15:10:01,705 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2062014712, now seen corresponding path program 8 times [2021-10-07 15:10:01,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:01,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482331728] [2021-10-07 15:10:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:01,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:02,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:02,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482331728] [2021-10-07 15:10:02,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482331728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:02,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075671731] [2021-10-07 15:10:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:10:02,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:02,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:02,015 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:02,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-07 15:10:02,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:10:02,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:02,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 15:10:02,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-07 15:10:02,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075671731] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:02,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:02,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2021-10-07 15:10:02,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199506777] [2021-10-07 15:10:02,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:10:02,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:02,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:10:02,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:10:02,817 INFO L87 Difference]: Start difference. First operand 5833 states and 20943 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:04,922 INFO L93 Difference]: Finished difference Result 11001 states and 35544 transitions. [2021-10-07 15:10:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-07 15:10:04,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:10:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:04,950 INFO L225 Difference]: With dead ends: 11001 [2021-10-07 15:10:04,950 INFO L226 Difference]: Without dead ends: 10769 [2021-10-07 15:10:04,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1407.3ms TimeCoverageRelationStatistics Valid=339, Invalid=1823, Unknown=0, NotChecked=0, Total=2162 [2021-10-07 15:10:04,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10769 states. [2021-10-07 15:10:05,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10769 to 6041. [2021-10-07 15:10:05,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6041 states, 6035 states have (on average 3.6298260149130073) internal successors, (21906), 6040 states have internal predecessors, (21906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6041 states to 6041 states and 21906 transitions. [2021-10-07 15:10:05,306 INFO L78 Accepts]: Start accepts. Automaton has 6041 states and 21906 transitions. Word has length 21 [2021-10-07 15:10:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:05,306 INFO L470 AbstractCegarLoop]: Abstraction has 6041 states and 21906 transitions. [2021-10-07 15:10:05,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6041 states and 21906 transitions. [2021-10-07 15:10:05,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:10:05,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:05,310 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:05,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-07 15:10:05,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-07 15:10:05,511 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:05,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:05,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2065085571, now seen corresponding path program 8 times [2021-10-07 15:10:05,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:05,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418352954] [2021-10-07 15:10:05,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:05,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:06,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:06,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418352954] [2021-10-07 15:10:06,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418352954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:06,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795630978] [2021-10-07 15:10:06,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:10:06,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:06,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:06,234 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:06,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-07 15:10:06,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:10:06,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:06,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-07 15:10:06,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:10:07,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795630978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:07,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:07,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 19 [2021-10-07 15:10:07,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398823193] [2021-10-07 15:10:07,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 15:10:07,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 15:10:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:10:07,419 INFO L87 Difference]: Start difference. First operand 6041 states and 21906 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:10,478 INFO L93 Difference]: Finished difference Result 10965 states and 36742 transitions. [2021-10-07 15:10:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 15:10:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:10:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:10,573 INFO L225 Difference]: With dead ends: 10965 [2021-10-07 15:10:10,573 INFO L226 Difference]: Without dead ends: 10825 [2021-10-07 15:10:10,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2321.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2021-10-07 15:10:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10825 states. [2021-10-07 15:10:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10825 to 7257. [2021-10-07 15:10:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7257 states, 7251 states have (on average 3.5979864846228105) internal successors, (26089), 7256 states have internal predecessors, (26089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7257 states to 7257 states and 26089 transitions. [2021-10-07 15:10:10,817 INFO L78 Accepts]: Start accepts. Automaton has 7257 states and 26089 transitions. Word has length 21 [2021-10-07 15:10:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:10,817 INFO L470 AbstractCegarLoop]: Abstraction has 7257 states and 26089 transitions. [2021-10-07 15:10:10,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 7257 states and 26089 transitions. [2021-10-07 15:10:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:10:10,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:10,823 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:10,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:11,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-07 15:10:11,035 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:11,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2065085572, now seen corresponding path program 9 times [2021-10-07 15:10:11,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:11,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932742205] [2021-10-07 15:10:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:11,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:11,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:11,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932742205] [2021-10-07 15:10:11,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932742205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:11,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959317449] [2021-10-07 15:10:11,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:10:11,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:11,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:11,700 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:11,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-07 15:10:12,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:10:12,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:12,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-07 15:10:12,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-07 15:10:12,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959317449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:12,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:12,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 16 [2021-10-07 15:10:12,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754660847] [2021-10-07 15:10:12,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:10:12,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:12,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:10:12,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:10:12,587 INFO L87 Difference]: Start difference. First operand 7257 states and 26089 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:15,445 INFO L93 Difference]: Finished difference Result 12300 states and 40688 transitions. [2021-10-07 15:10:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-07 15:10:15,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:10:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:15,474 INFO L225 Difference]: With dead ends: 12300 [2021-10-07 15:10:15,474 INFO L226 Difference]: Without dead ends: 12220 [2021-10-07 15:10:15,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1963.6ms TimeCoverageRelationStatistics Valid=324, Invalid=1932, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:10:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12220 states. [2021-10-07 15:10:15,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12220 to 7825. [2021-10-07 15:10:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 7819 states have (on average 3.6057040542268832) internal successors, (28193), 7824 states have internal predecessors, (28193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 28193 transitions. [2021-10-07 15:10:15,800 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 28193 transitions. Word has length 21 [2021-10-07 15:10:15,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:15,800 INFO L470 AbstractCegarLoop]: Abstraction has 7825 states and 28193 transitions. [2021-10-07 15:10:15,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 28193 transitions. [2021-10-07 15:10:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:10:15,804 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:15,804 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:15,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-07 15:10:16,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-07 15:10:16,005 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:16,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1203265987, now seen corresponding path program 9 times [2021-10-07 15:10:16,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:16,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725600341] [2021-10-07 15:10:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:16,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:16,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:16,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725600341] [2021-10-07 15:10:16,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725600341] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:16,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845246354] [2021-10-07 15:10:16,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:10:16,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:16,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:16,474 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-07 15:10:17,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:10:17,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:17,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-07 15:10:17,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:17,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-07 15:10:17,256 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-07 15:10:17,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 47 [2021-10-07 15:10:17,405 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-07 15:10:17,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 54 [2021-10-07 15:10:17,588 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:10:17,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2021-10-07 15:10:17,796 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:10:17,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-10-07 15:10:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:19,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845246354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:19,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:19,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-07 15:10:19,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448957402] [2021-10-07 15:10:19,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:10:19,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:10:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:10:19,244 INFO L87 Difference]: Start difference. First operand 7825 states and 28193 transitions. Second operand has 27 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:24,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:24,762 INFO L93 Difference]: Finished difference Result 9326 states and 32632 transitions. [2021-10-07 15:10:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:10:24,762 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:10:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:24,788 INFO L225 Difference]: With dead ends: 9326 [2021-10-07 15:10:24,789 INFO L226 Difference]: Without dead ends: 9326 [2021-10-07 15:10:24,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 3956.8ms TimeCoverageRelationStatistics Valid=351, Invalid=3071, Unknown=0, NotChecked=0, Total=3422 [2021-10-07 15:10:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9326 states. [2021-10-07 15:10:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9326 to 7959. [2021-10-07 15:10:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7953 states have (on average 3.586822582673205) internal successors, (28526), 7958 states have internal predecessors, (28526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 28526 transitions. [2021-10-07 15:10:25,004 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 28526 transitions. Word has length 21 [2021-10-07 15:10:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:25,004 INFO L470 AbstractCegarLoop]: Abstraction has 7959 states and 28526 transitions. [2021-10-07 15:10:25,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 28526 transitions. [2021-10-07 15:10:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-07 15:10:25,008 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:25,008 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:25,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-07 15:10:25,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:25,209 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:25,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1203265988, now seen corresponding path program 10 times [2021-10-07 15:10:25,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:25,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226286911] [2021-10-07 15:10:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:25,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:10:25,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:25,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226286911] [2021-10-07 15:10:25,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226286911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:25,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527944748] [2021-10-07 15:10:25,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:10:25,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:25,308 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:25,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-07 15:10:26,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:10:26,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:26,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-07 15:10:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:26,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-07 15:10:26,266 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:10:26,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:10:26,370 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:10:26,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:10:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527944748] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:26,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:26,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 16 [2021-10-07 15:10:26,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254208313] [2021-10-07 15:10:26,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:10:26,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:26,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:10:26,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:10:26,908 INFO L87 Difference]: Start difference. First operand 7959 states and 28526 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:28,545 INFO L93 Difference]: Finished difference Result 11738 states and 40181 transitions. [2021-10-07 15:10:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:10:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-07 15:10:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:28,577 INFO L225 Difference]: With dead ends: 11738 [2021-10-07 15:10:28,577 INFO L226 Difference]: Without dead ends: 11738 [2021-10-07 15:10:28,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 948.2ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:10:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11738 states. [2021-10-07 15:10:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11738 to 8429. [2021-10-07 15:10:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8429 states, 8423 states have (on average 3.59028849578535) internal successors, (30241), 8428 states have internal predecessors, (30241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8429 states to 8429 states and 30241 transitions. [2021-10-07 15:10:28,822 INFO L78 Accepts]: Start accepts. Automaton has 8429 states and 30241 transitions. Word has length 21 [2021-10-07 15:10:28,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:28,824 INFO L470 AbstractCegarLoop]: Abstraction has 8429 states and 30241 transitions. [2021-10-07 15:10:28,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 8429 states and 30241 transitions. [2021-10-07 15:10:28,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:10:28,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:28,830 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:28,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:29,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-07 15:10:29,031 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:29,032 INFO L82 PathProgramCache]: Analyzing trace with hash 522735302, now seen corresponding path program 10 times [2021-10-07 15:10:29,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:29,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414575428] [2021-10-07 15:10:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:29,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:10:29,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:29,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414575428] [2021-10-07 15:10:29,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414575428] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:29,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722426629] [2021-10-07 15:10:29,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:10:29,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:29,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:29,165 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:29,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-07 15:10:29,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:10:29,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:29,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-07 15:10:29,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:10:30,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722426629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:30,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:30,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-07 15:10:30,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534873210] [2021-10-07 15:10:30,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:10:30,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:30,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:10:30,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:10:30,322 INFO L87 Difference]: Start difference. First operand 8429 states and 30241 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:30,825 INFO L93 Difference]: Finished difference Result 9676 states and 33685 transitions. [2021-10-07 15:10:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:10:30,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:10:30,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:30,848 INFO L225 Difference]: With dead ends: 9676 [2021-10-07 15:10:30,848 INFO L226 Difference]: Without dead ends: 9566 [2021-10-07 15:10:30,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:10:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9566 states. [2021-10-07 15:10:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9566 to 8519. [2021-10-07 15:10:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8519 states, 8513 states have (on average 3.583460589686362) internal successors, (30506), 8518 states have internal predecessors, (30506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8519 states to 8519 states and 30506 transitions. [2021-10-07 15:10:31,030 INFO L78 Accepts]: Start accepts. Automaton has 8519 states and 30506 transitions. Word has length 22 [2021-10-07 15:10:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:31,030 INFO L470 AbstractCegarLoop]: Abstraction has 8519 states and 30506 transitions. [2021-10-07 15:10:31,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:31,030 INFO L276 IsEmpty]: Start isEmpty. Operand 8519 states and 30506 transitions. [2021-10-07 15:10:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:10:31,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:31,035 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:31,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:31,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:31,235 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:31,236 INFO L82 PathProgramCache]: Analyzing trace with hash 651447302, now seen corresponding path program 11 times [2021-10-07 15:10:31,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:31,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235011730] [2021-10-07 15:10:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:31,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:32,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:32,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235011730] [2021-10-07 15:10:32,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235011730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:32,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085040240] [2021-10-07 15:10:32,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:10:32,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:32,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:32,006 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:32,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-07 15:10:32,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:10:32,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:32,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:10:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:10:33,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085040240] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:33,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:33,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 22 [2021-10-07 15:10:33,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258460609] [2021-10-07 15:10:33,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:10:33,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:10:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:10:33,382 INFO L87 Difference]: Start difference. First operand 8519 states and 30506 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:35,010 INFO L93 Difference]: Finished difference Result 11652 states and 39850 transitions. [2021-10-07 15:10:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:10:35,011 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:10:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:35,039 INFO L225 Difference]: With dead ends: 11652 [2021-10-07 15:10:35,039 INFO L226 Difference]: Without dead ends: 11512 [2021-10-07 15:10:35,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1267.8ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:10:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11512 states. [2021-10-07 15:10:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11512 to 8691. [2021-10-07 15:10:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8691 states, 8685 states have (on average 3.5611974668969486) internal successors, (30929), 8690 states have internal predecessors, (30929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8691 states to 8691 states and 30929 transitions. [2021-10-07 15:10:35,246 INFO L78 Accepts]: Start accepts. Automaton has 8691 states and 30929 transitions. Word has length 22 [2021-10-07 15:10:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:35,246 INFO L470 AbstractCegarLoop]: Abstraction has 8691 states and 30929 transitions. [2021-10-07 15:10:35,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 8691 states and 30929 transitions. [2021-10-07 15:10:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:10:35,251 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:35,251 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:35,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:35,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-07 15:10:35,452 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1000738386, now seen corresponding path program 12 times [2021-10-07 15:10:35,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:35,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321482427] [2021-10-07 15:10:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:35,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:10:35,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:35,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321482427] [2021-10-07 15:10:35,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321482427] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:35,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494643219] [2021-10-07 15:10:35,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:10:35,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:35,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:35,576 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:35,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-07 15:10:36,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:10:36,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-07 15:10:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:10:36,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494643219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:36,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:36,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 15 [2021-10-07 15:10:36,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771793585] [2021-10-07 15:10:36,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-07 15:10:36,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:36,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-07 15:10:36,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:10:36,819 INFO L87 Difference]: Start difference. First operand 8691 states and 30929 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:37,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:37,344 INFO L93 Difference]: Finished difference Result 11257 states and 38795 transitions. [2021-10-07 15:10:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:10:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:10:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:37,373 INFO L225 Difference]: With dead ends: 11257 [2021-10-07 15:10:37,373 INFO L226 Difference]: Without dead ends: 11207 [2021-10-07 15:10:37,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-07 15:10:37,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11207 states. [2021-10-07 15:10:37,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11207 to 9207. [2021-10-07 15:10:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9207 states, 9201 states have (on average 3.567220954244104) internal successors, (32822), 9206 states have internal predecessors, (32822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9207 states to 9207 states and 32822 transitions. [2021-10-07 15:10:37,577 INFO L78 Accepts]: Start accepts. Automaton has 9207 states and 32822 transitions. Word has length 22 [2021-10-07 15:10:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:37,577 INFO L470 AbstractCegarLoop]: Abstraction has 9207 states and 32822 transitions. [2021-10-07 15:10:37,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:37,578 INFO L276 IsEmpty]: Start isEmpty. Operand 9207 states and 32822 transitions. [2021-10-07 15:10:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:10:37,582 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:37,582 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:37,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:37,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:37,783 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:37,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1580981706, now seen corresponding path program 6 times [2021-10-07 15:10:37,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:37,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514504776] [2021-10-07 15:10:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:37,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:38,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:38,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514504776] [2021-10-07 15:10:38,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514504776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:38,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009165788] [2021-10-07 15:10:38,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:10:38,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:38,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:38,357 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:38,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-07 15:10:39,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:10:39,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-07 15:10:39,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:39,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:10:39,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:39,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:39,778 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:10:39,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-07 15:10:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:40,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009165788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:40,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:40,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-07 15:10:40,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270191104] [2021-10-07 15:10:40,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:10:40,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:40,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:10:40,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:10:40,501 INFO L87 Difference]: Start difference. First operand 9207 states and 32822 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:42,617 INFO L93 Difference]: Finished difference Result 10517 states and 36577 transitions. [2021-10-07 15:10:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:10:42,617 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:10:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:42,650 INFO L225 Difference]: With dead ends: 10517 [2021-10-07 15:10:42,650 INFO L226 Difference]: Without dead ends: 10487 [2021-10-07 15:10:42,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1946.0ms TimeCoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-10-07 15:10:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10487 states. [2021-10-07 15:10:42,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10487 to 9147. [2021-10-07 15:10:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9147 states, 9141 states have (on average 3.5709440980199103) internal successors, (32642), 9146 states have internal predecessors, (32642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9147 states to 9147 states and 32642 transitions. [2021-10-07 15:10:42,863 INFO L78 Accepts]: Start accepts. Automaton has 9147 states and 32642 transitions. Word has length 22 [2021-10-07 15:10:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:42,863 INFO L470 AbstractCegarLoop]: Abstraction has 9147 states and 32642 transitions. [2021-10-07 15:10:42,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 9147 states and 32642 transitions. [2021-10-07 15:10:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:10:42,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:42,869 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:42,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:43,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:43,070 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:43,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1502874922, now seen corresponding path program 7 times [2021-10-07 15:10:43,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:43,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957085143] [2021-10-07 15:10:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:43,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:10:43,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:43,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957085143] [2021-10-07 15:10:43,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957085143] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:43,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907470532] [2021-10-07 15:10:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:10:43,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:43,264 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:43,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-07 15:10:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:10:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:44,466 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:10:44,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-07 15:10:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:10:44,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907470532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:44,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:44,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-07 15:10:44,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608711012] [2021-10-07 15:10:44,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:10:44,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:10:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:10:44,748 INFO L87 Difference]: Start difference. First operand 9147 states and 32642 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:45,350 INFO L93 Difference]: Finished difference Result 9969 states and 35220 transitions. [2021-10-07 15:10:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:10:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:10:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:45,388 INFO L225 Difference]: With dead ends: 9969 [2021-10-07 15:10:45,388 INFO L226 Difference]: Without dead ends: 9929 [2021-10-07 15:10:45,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 450.5ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:10:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2021-10-07 15:10:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 9167. [2021-10-07 15:10:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9167 states, 9161 states have (on average 3.5696976312629625) internal successors, (32702), 9166 states have internal predecessors, (32702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9167 states to 9167 states and 32702 transitions. [2021-10-07 15:10:45,615 INFO L78 Accepts]: Start accepts. Automaton has 9167 states and 32702 transitions. Word has length 22 [2021-10-07 15:10:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:45,615 INFO L470 AbstractCegarLoop]: Abstraction has 9167 states and 32702 transitions. [2021-10-07 15:10:45,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9167 states and 32702 transitions. [2021-10-07 15:10:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:10:45,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:45,620 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:45,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:45,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-07 15:10:45,821 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:45,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:45,822 INFO L82 PathProgramCache]: Analyzing trace with hash 694144458, now seen corresponding path program 8 times [2021-10-07 15:10:45,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:45,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584917767] [2021-10-07 15:10:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:45,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:10:45,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:45,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584917767] [2021-10-07 15:10:45,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584917767] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:45,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89072033] [2021-10-07 15:10:45,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:10:45,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:45,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:45,998 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:46,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-07 15:10:46,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:10:46,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:46,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-07 15:10:46,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:46,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:10:47,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:10:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:47,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:47,508 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-10-07 15:10:47,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 47 [2021-10-07 15:10:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:47,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89072033] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:47,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:47,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 21 [2021-10-07 15:10:47,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376844676] [2021-10-07 15:10:47,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 15:10:47,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:47,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 15:10:47,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:10:47,797 INFO L87 Difference]: Start difference. First operand 9167 states and 32702 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:48,837 INFO L93 Difference]: Finished difference Result 9826 states and 34244 transitions. [2021-10-07 15:10:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:10:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:10:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:48,861 INFO L225 Difference]: With dead ends: 9826 [2021-10-07 15:10:48,861 INFO L226 Difference]: Without dead ends: 9746 [2021-10-07 15:10:48,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 838.3ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:10:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9746 states. [2021-10-07 15:10:49,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9746 to 8954. [2021-10-07 15:10:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8954 states, 8948 states have (on average 3.555543138131426) internal successors, (31815), 8953 states have internal predecessors, (31815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8954 states to 8954 states and 31815 transitions. [2021-10-07 15:10:49,046 INFO L78 Accepts]: Start accepts. Automaton has 8954 states and 31815 transitions. Word has length 22 [2021-10-07 15:10:49,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:49,046 INFO L470 AbstractCegarLoop]: Abstraction has 8954 states and 31815 transitions. [2021-10-07 15:10:49,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8954 states and 31815 transitions. [2021-10-07 15:10:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:10:49,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:49,051 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:49,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:49,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-07 15:10:49,252 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:49,253 INFO L82 PathProgramCache]: Analyzing trace with hash 822856458, now seen corresponding path program 9 times [2021-10-07 15:10:49,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:49,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107695975] [2021-10-07 15:10:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:49,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:50,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:50,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107695975] [2021-10-07 15:10:50,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107695975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:50,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920733079] [2021-10-07 15:10:50,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:10:50,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:50,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:50,090 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:50,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-07 15:10:51,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:10:51,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:51,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-07 15:10:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:51,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:10:51,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:51,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:10:51,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:10:51,903 INFO L354 Elim1Store]: treesize reduction 78, result has 24.3 percent of original size [2021-10-07 15:10:51,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-10-07 15:10:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:52,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920733079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:52,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:52,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 25 [2021-10-07 15:10:52,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445297765] [2021-10-07 15:10:52,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:10:52,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:52,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:10:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:10:52,267 INFO L87 Difference]: Start difference. First operand 8954 states and 31815 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:10:54,315 INFO L93 Difference]: Finished difference Result 9656 states and 33693 transitions. [2021-10-07 15:10:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:10:54,315 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:10:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:10:54,338 INFO L225 Difference]: With dead ends: 9656 [2021-10-07 15:10:54,338 INFO L226 Difference]: Without dead ends: 9596 [2021-10-07 15:10:54,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1788.2ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:10:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9596 states. [2021-10-07 15:10:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9596 to 8864. [2021-10-07 15:10:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8858 states have (on average 3.549333935425604) internal successors, (31440), 8863 states have internal predecessors, (31440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 31440 transitions. [2021-10-07 15:10:54,529 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 31440 transitions. Word has length 22 [2021-10-07 15:10:54,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:10:54,529 INFO L470 AbstractCegarLoop]: Abstraction has 8864 states and 31440 transitions. [2021-10-07 15:10:54,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:10:54,529 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 31440 transitions. [2021-10-07 15:10:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:10:54,534 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:10:54,534 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:10:54,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-07 15:10:54,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-07 15:10:54,735 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:10:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:10:54,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1008318365, now seen corresponding path program 5 times [2021-10-07 15:10:54,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:10:54,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620874994] [2021-10-07 15:10:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:10:54,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:10:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:10:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:55,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:10:55,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620874994] [2021-10-07 15:10:55,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620874994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:55,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945501026] [2021-10-07 15:10:55,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:10:55,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:10:55,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:10:55,658 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:10:55,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-07 15:10:56,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:10:56,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:10:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-07 15:10:56,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:10:57,328 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:10:57,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-07 15:10:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:10:57,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945501026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:10:57,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:10:57,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-10-07 15:10:57,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364885587] [2021-10-07 15:10:57,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:10:57,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:10:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:10:57,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:10:57,380 INFO L87 Difference]: Start difference. First operand 8864 states and 31440 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:01,016 INFO L93 Difference]: Finished difference Result 11929 states and 39751 transitions. [2021-10-07 15:11:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:11:01,017 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:01,048 INFO L225 Difference]: With dead ends: 11929 [2021-10-07 15:11:01,048 INFO L226 Difference]: Without dead ends: 11843 [2021-10-07 15:11:01,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 3377.0ms TimeCoverageRelationStatistics Valid=407, Invalid=2245, Unknown=0, NotChecked=0, Total=2652 [2021-10-07 15:11:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11843 states. [2021-10-07 15:11:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11843 to 8867. [2021-10-07 15:11:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8867 states, 8861 states have (on average 3.507843358537411) internal successors, (31083), 8866 states have internal predecessors, (31083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8867 states to 8867 states and 31083 transitions. [2021-10-07 15:11:01,276 INFO L78 Accepts]: Start accepts. Automaton has 8867 states and 31083 transitions. Word has length 22 [2021-10-07 15:11:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:01,276 INFO L470 AbstractCegarLoop]: Abstraction has 8867 states and 31083 transitions. [2021-10-07 15:11:01,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 8867 states and 31083 transitions. [2021-10-07 15:11:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:01,282 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:01,282 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:01,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-07 15:11:01,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:01,483 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:01,483 INFO L82 PathProgramCache]: Analyzing trace with hash 707565288, now seen corresponding path program 10 times [2021-10-07 15:11:01,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:01,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139143837] [2021-10-07 15:11:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:01,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:02,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:02,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139143837] [2021-10-07 15:11:02,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139143837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:02,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380097744] [2021-10-07 15:11:02,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:11:02,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:02,686 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:02,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-07 15:11:03,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:11:03,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-07 15:11:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:03,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:03,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 304 [2021-10-07 15:11:03,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-07 15:11:04,025 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:11:04,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-07 15:11:04,159 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:11:04,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-07 15:11:05,087 INFO L354 Elim1Store]: treesize reduction 254, result has 13.0 percent of original size [2021-10-07 15:11:05,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 79 [2021-10-07 15:11:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:05,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380097744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:05,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:05,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 26 [2021-10-07 15:11:05,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176637364] [2021-10-07 15:11:05,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:11:05,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:11:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:11:05,389 INFO L87 Difference]: Start difference. First operand 8867 states and 31083 transitions. Second operand has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:08,890 INFO L93 Difference]: Finished difference Result 8959 states and 29988 transitions. [2021-10-07 15:11:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:11:08,891 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:08,912 INFO L225 Difference]: With dead ends: 8959 [2021-10-07 15:11:08,912 INFO L226 Difference]: Without dead ends: 8699 [2021-10-07 15:11:08,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3252.1ms TimeCoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:11:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2021-10-07 15:11:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 7903. [2021-10-07 15:11:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7903 states, 7897 states have (on average 3.4667595289350386) internal successors, (27377), 7902 states have internal predecessors, (27377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7903 states to 7903 states and 27377 transitions. [2021-10-07 15:11:09,076 INFO L78 Accepts]: Start accepts. Automaton has 7903 states and 27377 transitions. Word has length 22 [2021-10-07 15:11:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:09,076 INFO L470 AbstractCegarLoop]: Abstraction has 7903 states and 27377 transitions. [2021-10-07 15:11:09,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 7903 states and 27377 transitions. [2021-10-07 15:11:09,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:09,081 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:09,081 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:09,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-07 15:11:09,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:09,287 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash 707565289, now seen corresponding path program 6 times [2021-10-07 15:11:09,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:09,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57502989] [2021-10-07 15:11:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:09,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-07 15:11:09,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:09,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57502989] [2021-10-07 15:11:09,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57502989] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:09,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689947705] [2021-10-07 15:11:09,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:11:09,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:09,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:09,392 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:09,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-07 15:11:10,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:11:10,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:10,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-07 15:11:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:10,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:11:10,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:10,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:11,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:11,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:11,308 INFO L354 Elim1Store]: treesize reduction 114, result has 24.0 percent of original size [2021-10-07 15:11:11,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 62 [2021-10-07 15:11:11,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:11,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689947705] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:11,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:11,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 19 [2021-10-07 15:11:11,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894281272] [2021-10-07 15:11:11,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 15:11:11,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:11,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 15:11:11,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:11:11,483 INFO L87 Difference]: Start difference. First operand 7903 states and 27377 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:12,355 INFO L93 Difference]: Finished difference Result 9794 states and 33370 transitions. [2021-10-07 15:11:12,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:11:12,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:12,379 INFO L225 Difference]: With dead ends: 9794 [2021-10-07 15:11:12,379 INFO L226 Difference]: Without dead ends: 9774 [2021-10-07 15:11:12,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 691.2ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:11:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2021-10-07 15:11:12,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 7897. [2021-10-07 15:11:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7897 states, 7891 states have (on average 3.468761880623495) internal successors, (27372), 7896 states have internal predecessors, (27372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7897 states to 7897 states and 27372 transitions. [2021-10-07 15:11:12,634 INFO L78 Accepts]: Start accepts. Automaton has 7897 states and 27372 transitions. Word has length 22 [2021-10-07 15:11:12,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:12,634 INFO L470 AbstractCegarLoop]: Abstraction has 7897 states and 27372 transitions. [2021-10-07 15:11:12,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:12,634 INFO L276 IsEmpty]: Start isEmpty. Operand 7897 states and 27372 transitions. [2021-10-07 15:11:12,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:12,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:12,639 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:12,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-07 15:11:12,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:12,840 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:12,841 INFO L82 PathProgramCache]: Analyzing trace with hash 703423069, now seen corresponding path program 7 times [2021-10-07 15:11:12,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:12,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015476910] [2021-10-07 15:11:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:12,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-07 15:11:12,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:12,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015476910] [2021-10-07 15:11:12,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015476910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:12,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793581092] [2021-10-07 15:11:12,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:11:12,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:12,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:12,967 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:12,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-07 15:11:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:13,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-07 15:11:14,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:14,577 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:11:14,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-07 15:11:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:14,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793581092] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:14,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:14,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 18 [2021-10-07 15:11:14,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739599307] [2021-10-07 15:11:14,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:11:14,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:14,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:11:14,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:11:14,623 INFO L87 Difference]: Start difference. First operand 7897 states and 27372 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:16,018 INFO L93 Difference]: Finished difference Result 10329 states and 34374 transitions. [2021-10-07 15:11:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:11:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:16,043 INFO L225 Difference]: With dead ends: 10329 [2021-10-07 15:11:16,044 INFO L226 Difference]: Without dead ends: 10315 [2021-10-07 15:11:16,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1079.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:11:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10315 states. [2021-10-07 15:11:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10315 to 7893. [2021-10-07 15:11:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7893 states, 7887 states have (on average 3.4638011918346647) internal successors, (27319), 7892 states have internal predecessors, (27319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7893 states to 7893 states and 27319 transitions. [2021-10-07 15:11:16,326 INFO L78 Accepts]: Start accepts. Automaton has 7893 states and 27319 transitions. Word has length 22 [2021-10-07 15:11:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:16,327 INFO L470 AbstractCegarLoop]: Abstraction has 7893 states and 27319 transitions. [2021-10-07 15:11:16,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7893 states and 27319 transitions. [2021-10-07 15:11:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:16,331 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:16,331 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:16,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-07 15:11:16,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-07 15:11:16,532 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:16,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1804834614, now seen corresponding path program 11 times [2021-10-07 15:11:16,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:16,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477385647] [2021-10-07 15:11:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:16,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:17,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:17,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:17,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477385647] [2021-10-07 15:11:17,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477385647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:17,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907716929] [2021-10-07 15:11:17,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:11:17,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:17,188 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:17,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-07 15:11:18,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:11:18,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-07 15:11:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:18,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:18,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:18,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 113 [2021-10-07 15:11:18,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-07 15:11:18,582 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:11:18,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-07 15:11:18,701 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:11:18,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-07 15:11:19,193 INFO L354 Elim1Store]: treesize reduction 156, result has 17.9 percent of original size [2021-10-07 15:11:19,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 81 [2021-10-07 15:11:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:20,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907716929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:20,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:20,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 24 [2021-10-07 15:11:20,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413536635] [2021-10-07 15:11:20,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:11:20,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:11:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:11:20,083 INFO L87 Difference]: Start difference. First operand 7893 states and 27319 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:24,745 INFO L93 Difference]: Finished difference Result 10054 states and 33266 transitions. [2021-10-07 15:11:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:11:24,746 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:24,767 INFO L225 Difference]: With dead ends: 10054 [2021-10-07 15:11:24,767 INFO L226 Difference]: Without dead ends: 8736 [2021-10-07 15:11:24,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3645.5ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:11:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8736 states. [2021-10-07 15:11:24,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8736 to 7677. [2021-10-07 15:11:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7677 states, 7671 states have (on average 3.4758180159040544) internal successors, (26663), 7676 states have internal predecessors, (26663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7677 states to 7677 states and 26663 transitions. [2021-10-07 15:11:24,926 INFO L78 Accepts]: Start accepts. Automaton has 7677 states and 26663 transitions. Word has length 22 [2021-10-07 15:11:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:24,926 INFO L470 AbstractCegarLoop]: Abstraction has 7677 states and 26663 transitions. [2021-10-07 15:11:24,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7677 states and 26663 transitions. [2021-10-07 15:11:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:24,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:24,931 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:24,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-07 15:11:25,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-07 15:11:25,132 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:25,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1676122614, now seen corresponding path program 12 times [2021-10-07 15:11:25,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:25,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398660249] [2021-10-07 15:11:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:25,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:25,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:25,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398660249] [2021-10-07 15:11:25,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398660249] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:25,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73069167] [2021-10-07 15:11:25,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:11:25,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:25,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:25,695 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:25,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-07 15:11:26,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:11:26,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:26,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-07 15:11:26,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:27,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:11:27,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:27,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:27,638 INFO L354 Elim1Store]: treesize reduction 75, result has 24.2 percent of original size [2021-10-07 15:11:27,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-10-07 15:11:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:28,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73069167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:28,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:28,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-07 15:11:28,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69642859] [2021-10-07 15:11:28,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:11:28,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:11:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:11:28,174 INFO L87 Difference]: Start difference. First operand 7677 states and 26663 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:29,552 INFO L93 Difference]: Finished difference Result 8079 states and 27761 transitions. [2021-10-07 15:11:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:11:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:29,571 INFO L225 Difference]: With dead ends: 8079 [2021-10-07 15:11:29,571 INFO L226 Difference]: Without dead ends: 8059 [2021-10-07 15:11:29,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1316.3ms TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:11:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-10-07 15:11:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 7667. [2021-10-07 15:11:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7667 states, 7661 states have (on average 3.477091763477353) internal successors, (26638), 7666 states have internal predecessors, (26638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7667 states to 7667 states and 26638 transitions. [2021-10-07 15:11:29,798 INFO L78 Accepts]: Start accepts. Automaton has 7667 states and 26638 transitions. Word has length 22 [2021-10-07 15:11:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:29,798 INFO L470 AbstractCegarLoop]: Abstraction has 7667 states and 26638 transitions. [2021-10-07 15:11:29,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 7667 states and 26638 transitions. [2021-10-07 15:11:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:29,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:29,802 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:29,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-07 15:11:30,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-07 15:11:30,003 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:30,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1194071362, now seen corresponding path program 13 times [2021-10-07 15:11:30,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:30,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403379795] [2021-10-07 15:11:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:30,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:30,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:30,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403379795] [2021-10-07 15:11:30,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403379795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:30,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456171582] [2021-10-07 15:11:30,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:11:30,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:30,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:30,611 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:30,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-07 15:11:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:31,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-07 15:11:31,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:31,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:11:32,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:11:32,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:32,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:32,496 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-10-07 15:11:32,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-10-07 15:11:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:32,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456171582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:32,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:32,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-07 15:11:32,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621957485] [2021-10-07 15:11:32,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:11:32,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:32,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:11:32,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:11:32,949 INFO L87 Difference]: Start difference. First operand 7667 states and 26638 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:34,704 INFO L93 Difference]: Finished difference Result 8091 states and 27745 transitions. [2021-10-07 15:11:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 15:11:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:34,722 INFO L225 Difference]: With dead ends: 8091 [2021-10-07 15:11:34,722 INFO L226 Difference]: Without dead ends: 8071 [2021-10-07 15:11:34,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1631.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:11:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8071 states. [2021-10-07 15:11:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8071 to 7657. [2021-10-07 15:11:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7657 states, 7651 states have (on average 3.4783688406744218) internal successors, (26613), 7656 states have internal predecessors, (26613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7657 states to 7657 states and 26613 transitions. [2021-10-07 15:11:34,864 INFO L78 Accepts]: Start accepts. Automaton has 7657 states and 26613 transitions. Word has length 22 [2021-10-07 15:11:34,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:34,864 INFO L470 AbstractCegarLoop]: Abstraction has 7657 states and 26613 transitions. [2021-10-07 15:11:34,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 7657 states and 26613 transitions. [2021-10-07 15:11:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:34,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:34,869 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:34,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-07 15:11:35,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-07 15:11:35,070 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1757025098, now seen corresponding path program 14 times [2021-10-07 15:11:35,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:35,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007973010] [2021-10-07 15:11:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:35,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:11:35,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:35,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007973010] [2021-10-07 15:11:35,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007973010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:35,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181489739] [2021-10-07 15:11:35,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:11:35,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:35,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:35,244 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:35,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-07 15:11:36,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:11:36,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:36,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-07 15:11:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:36,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:11:36,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:11:36,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:36,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:37,104 INFO L354 Elim1Store]: treesize reduction 75, result has 24.2 percent of original size [2021-10-07 15:11:37,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-10-07 15:11:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:37,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181489739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:37,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:37,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 20 [2021-10-07 15:11:37,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411280724] [2021-10-07 15:11:37,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 15:11:37,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 15:11:37,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:11:37,465 INFO L87 Difference]: Start difference. First operand 7657 states and 26613 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:38,447 INFO L93 Difference]: Finished difference Result 9528 states and 32143 transitions. [2021-10-07 15:11:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:11:38,448 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:38,470 INFO L225 Difference]: With dead ends: 9528 [2021-10-07 15:11:38,470 INFO L226 Difference]: Without dead ends: 9508 [2021-10-07 15:11:38,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:11:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9508 states. [2021-10-07 15:11:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9508 to 7457. [2021-10-07 15:11:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7457 states, 7451 states have (on average 3.4650382498993424) internal successors, (25818), 7456 states have internal predecessors, (25818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7457 states to 7457 states and 25818 transitions. [2021-10-07 15:11:38,649 INFO L78 Accepts]: Start accepts. Automaton has 7457 states and 25818 transitions. Word has length 22 [2021-10-07 15:11:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:38,649 INFO L470 AbstractCegarLoop]: Abstraction has 7457 states and 25818 transitions. [2021-10-07 15:11:38,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7457 states and 25818 transitions. [2021-10-07 15:11:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:38,654 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:38,654 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:38,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-07 15:11:38,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:38,855 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:38,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:38,856 INFO L82 PathProgramCache]: Analyzing trace with hash -416130498, now seen corresponding path program 15 times [2021-10-07 15:11:38,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:38,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691906882] [2021-10-07 15:11:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:38,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:39,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:39,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691906882] [2021-10-07 15:11:39,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691906882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:39,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702584855] [2021-10-07 15:11:39,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:11:39,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:39,462 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:39,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-07 15:11:40,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:11:40,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:40,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-07 15:11:40,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:41,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:11:41,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:11:41,581 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:11:41,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-07 15:11:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:41,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702584855] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:41,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:41,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 26 [2021-10-07 15:11:41,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476279245] [2021-10-07 15:11:41,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:11:41,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:41,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:11:41,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:11:41,939 INFO L87 Difference]: Start difference. First operand 7457 states and 25818 transitions. Second operand has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:45,514 INFO L93 Difference]: Finished difference Result 6520 states and 21035 transitions. [2021-10-07 15:11:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:11:45,515 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:45,530 INFO L225 Difference]: With dead ends: 6520 [2021-10-07 15:11:45,530 INFO L226 Difference]: Without dead ends: 6052 [2021-10-07 15:11:45,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 3395.7ms TimeCoverageRelationStatistics Valid=430, Invalid=2326, Unknown=0, NotChecked=0, Total=2756 [2021-10-07 15:11:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2021-10-07 15:11:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 4463. [2021-10-07 15:11:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4457 states have (on average 3.404532196544761) internal successors, (15174), 4462 states have internal predecessors, (15174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 15174 transitions. [2021-10-07 15:11:45,713 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 15174 transitions. Word has length 22 [2021-10-07 15:11:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:45,714 INFO L470 AbstractCegarLoop]: Abstraction has 4463 states and 15174 transitions. [2021-10-07 15:11:45,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 15174 transitions. [2021-10-07 15:11:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:45,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:45,717 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:45,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-07 15:11:45,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-07 15:11:45,918 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:45,919 INFO L82 PathProgramCache]: Analyzing trace with hash -290489358, now seen corresponding path program 16 times [2021-10-07 15:11:45,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:45,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630543201] [2021-10-07 15:11:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:45,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:46,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:46,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630543201] [2021-10-07 15:11:46,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630543201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:46,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997840591] [2021-10-07 15:11:46,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:11:46,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:46,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:46,571 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:46,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-07 15:11:47,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:11:47,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:47,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-07 15:11:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:47,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2021-10-07 15:11:48,741 INFO L354 Elim1Store]: treesize reduction 161, result has 17.9 percent of original size [2021-10-07 15:11:48,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 72 [2021-10-07 15:11:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:49,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997840591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:49,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:49,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 25 [2021-10-07 15:11:49,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433326835] [2021-10-07 15:11:49,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:11:49,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:49,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:11:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:11:49,283 INFO L87 Difference]: Start difference. First operand 4463 states and 15174 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:51,291 INFO L93 Difference]: Finished difference Result 5064 states and 16733 transitions. [2021-10-07 15:11:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:11:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:51,303 INFO L225 Difference]: With dead ends: 5064 [2021-10-07 15:11:51,303 INFO L226 Difference]: Without dead ends: 5054 [2021-10-07 15:11:51,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1758.6ms TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:11:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-10-07 15:11:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 4521. [2021-10-07 15:11:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4515 states have (on average 3.4057585825027687) internal successors, (15377), 4520 states have internal predecessors, (15377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 15377 transitions. [2021-10-07 15:11:51,386 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 15377 transitions. Word has length 22 [2021-10-07 15:11:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:51,386 INFO L470 AbstractCegarLoop]: Abstraction has 4521 states and 15377 transitions. [2021-10-07 15:11:51,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 15377 transitions. [2021-10-07 15:11:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:51,389 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:51,389 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:51,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-07 15:11:51,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:51,597 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:51,598 INFO L82 PathProgramCache]: Analyzing trace with hash -287418498, now seen corresponding path program 17 times [2021-10-07 15:11:51,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:51,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478103820] [2021-10-07 15:11:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:51,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:52,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:52,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478103820] [2021-10-07 15:11:52,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478103820] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:52,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332588125] [2021-10-07 15:11:52,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:11:52,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:52,197 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:52,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-07 15:11:53,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:11:53,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:11:53,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-07 15:11:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:11:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:11:53,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 101 [2021-10-07 15:11:53,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-07 15:11:54,085 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:11:54,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-07 15:11:54,216 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:11:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-07 15:11:54,896 INFO L354 Elim1Store]: treesize reduction 161, result has 17.9 percent of original size [2021-10-07 15:11:54,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 76 [2021-10-07 15:11:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:11:55,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332588125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:55,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:11:55,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-07 15:11:55,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137307896] [2021-10-07 15:11:55,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:11:55,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:11:55,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:11:55,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:11:55,347 INFO L87 Difference]: Start difference. First operand 4521 states and 15377 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:11:59,217 INFO L93 Difference]: Finished difference Result 6233 states and 20025 transitions. [2021-10-07 15:11:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:11:59,217 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:11:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:11:59,232 INFO L225 Difference]: With dead ends: 6233 [2021-10-07 15:11:59,232 INFO L226 Difference]: Without dead ends: 6213 [2021-10-07 15:11:59,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 3449.5ms TimeCoverageRelationStatistics Valid=320, Invalid=2032, Unknown=0, NotChecked=0, Total=2352 [2021-10-07 15:11:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-10-07 15:11:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 4609. [2021-10-07 15:11:59,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4609 states, 4603 states have (on average 3.4003910493156635) internal successors, (15652), 4608 states have internal predecessors, (15652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4609 states to 4609 states and 15652 transitions. [2021-10-07 15:11:59,326 INFO L78 Accepts]: Start accepts. Automaton has 4609 states and 15652 transitions. Word has length 22 [2021-10-07 15:11:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:11:59,326 INFO L470 AbstractCegarLoop]: Abstraction has 4609 states and 15652 transitions. [2021-10-07 15:11:59,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:11:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4609 states and 15652 transitions. [2021-10-07 15:11:59,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:11:59,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:11:59,329 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:11:59,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-07 15:11:59,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:59,530 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:11:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:11:59,531 INFO L82 PathProgramCache]: Analyzing trace with hash -101956591, now seen corresponding path program 8 times [2021-10-07 15:11:59,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:11:59,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046364312] [2021-10-07 15:11:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:11:59,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:11:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:11:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:11:59,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:11:59,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046364312] [2021-10-07 15:11:59,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046364312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:11:59,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733472806] [2021-10-07 15:11:59,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:11:59,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:11:59,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:11:59,735 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:11:59,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-07 15:12:01,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:12:01,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:01,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-07 15:12:01,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:01,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 535 treesize of output 503 [2021-10-07 15:12:01,826 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:12:01,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:12:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:12:01,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733472806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:01,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:01,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-07 15:12:01,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075268793] [2021-10-07 15:12:01,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:12:01,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:01,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:12:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:12:01,879 INFO L87 Difference]: Start difference. First operand 4609 states and 15652 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:03,925 INFO L93 Difference]: Finished difference Result 6683 states and 21021 transitions. [2021-10-07 15:12:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-07 15:12:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:03,941 INFO L225 Difference]: With dead ends: 6683 [2021-10-07 15:12:03,941 INFO L226 Difference]: Without dead ends: 6599 [2021-10-07 15:12:03,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1547.7ms TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:12:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6599 states. [2021-10-07 15:12:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6599 to 4743. [2021-10-07 15:12:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4737 states have (on average 3.362465695587925) internal successors, (15928), 4742 states have internal predecessors, (15928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 15928 transitions. [2021-10-07 15:12:04,048 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 15928 transitions. Word has length 22 [2021-10-07 15:12:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:04,048 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 15928 transitions. [2021-10-07 15:12:04,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 15928 transitions. [2021-10-07 15:12:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:12:04,052 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:04,052 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:04,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:04,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:04,259 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:04,259 INFO L82 PathProgramCache]: Analyzing trace with hash -402709667, now seen corresponding path program 9 times [2021-10-07 15:12:04,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:04,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023284070] [2021-10-07 15:12:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:04,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-07 15:12:04,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:04,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023284070] [2021-10-07 15:12:04,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023284070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:04,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808341519] [2021-10-07 15:12:04,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:12:04,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:04,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:04,394 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:04,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-07 15:12:05,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:12:05,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:05,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-07 15:12:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:06,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:12:06,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:06,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:06,538 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:12:06,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-07 15:12:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:06,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808341519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:06,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:06,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 21 [2021-10-07 15:12:06,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265636449] [2021-10-07 15:12:06,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 15:12:06,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 15:12:06,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:12:06,670 INFO L87 Difference]: Start difference. First operand 4743 states and 15928 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:09,139 INFO L93 Difference]: Finished difference Result 7195 states and 22640 transitions. [2021-10-07 15:12:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-07 15:12:09,140 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:09,156 INFO L225 Difference]: With dead ends: 7195 [2021-10-07 15:12:09,156 INFO L226 Difference]: Without dead ends: 7047 [2021-10-07 15:12:09,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1878.2ms TimeCoverageRelationStatistics Valid=365, Invalid=2715, Unknown=0, NotChecked=0, Total=3080 [2021-10-07 15:12:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2021-10-07 15:12:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 4399. [2021-10-07 15:12:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4393 states have (on average 3.366264511723196) internal successors, (14788), 4398 states have internal predecessors, (14788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 14788 transitions. [2021-10-07 15:12:09,324 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 14788 transitions. Word has length 22 [2021-10-07 15:12:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:09,325 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 14788 transitions. [2021-10-07 15:12:09,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:09,325 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 14788 transitions. [2021-10-07 15:12:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:12:09,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:09,328 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:09,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:09,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:09,529 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:09,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:09,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1685080676, now seen corresponding path program 18 times [2021-10-07 15:12:09,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:09,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138534404] [2021-10-07 15:12:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:09,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:10,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:10,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138534404] [2021-10-07 15:12:10,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138534404] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:10,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185307630] [2021-10-07 15:12:10,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:12:10,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:10,035 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:10,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-07 15:12:11,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:12:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:11,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-07 15:12:11,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:11,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2021-10-07 15:12:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:12:12,193 INFO L354 Elim1Store]: treesize reduction 75, result has 24.2 percent of original size [2021-10-07 15:12:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 46 [2021-10-07 15:12:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:12,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185307630] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:12,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:12,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 24 [2021-10-07 15:12:12,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665256309] [2021-10-07 15:12:12,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:12:12,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:12,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:12:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:12:12,537 INFO L87 Difference]: Start difference. First operand 4399 states and 14788 transitions. Second operand has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:13,789 INFO L93 Difference]: Finished difference Result 4712 states and 15584 transitions. [2021-10-07 15:12:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:12:13,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:13,801 INFO L225 Difference]: With dead ends: 4712 [2021-10-07 15:12:13,801 INFO L226 Difference]: Without dead ends: 4604 [2021-10-07 15:12:13,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1177.6ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:12:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2021-10-07 15:12:13,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 4459. [2021-10-07 15:12:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4453 states have (on average 3.3626768470693915) internal successors, (14974), 4458 states have internal predecessors, (14974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 14974 transitions. [2021-10-07 15:12:13,885 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 14974 transitions. Word has length 22 [2021-10-07 15:12:13,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:13,885 INFO L470 AbstractCegarLoop]: Abstraction has 4459 states and 14974 transitions. [2021-10-07 15:12:13,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:13,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 14974 transitions. [2021-10-07 15:12:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:12:13,889 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:13,889 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:13,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:14,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:14,100 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:14,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1688151536, now seen corresponding path program 19 times [2021-10-07 15:12:14,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:14,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399150217] [2021-10-07 15:12:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:14,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:14,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:14,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399150217] [2021-10-07 15:12:14,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399150217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:14,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280507736] [2021-10-07 15:12:14,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:12:14,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:14,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:14,899 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:14,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-07 15:12:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:16,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-07 15:12:16,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:16,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:12:16,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:12:16,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:17,419 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-10-07 15:12:17,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-10-07 15:12:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:17,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280507736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:17,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:17,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-10-07 15:12:17,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702404409] [2021-10-07 15:12:17,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:12:17,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:17,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:12:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:12:17,675 INFO L87 Difference]: Start difference. First operand 4459 states and 14974 transitions. Second operand has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:19,599 INFO L93 Difference]: Finished difference Result 4901 states and 16160 transitions. [2021-10-07 15:12:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-07 15:12:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:19,610 INFO L225 Difference]: With dead ends: 4901 [2021-10-07 15:12:19,610 INFO L226 Difference]: Without dead ends: 4881 [2021-10-07 15:12:19,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1996.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:12:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4881 states. [2021-10-07 15:12:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4881 to 4459. [2021-10-07 15:12:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4453 states have (on average 3.3626768470693915) internal successors, (14974), 4458 states have internal predecessors, (14974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 14974 transitions. [2021-10-07 15:12:19,691 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 14974 transitions. Word has length 22 [2021-10-07 15:12:19,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:19,691 INFO L470 AbstractCegarLoop]: Abstraction has 4459 states and 14974 transitions. [2021-10-07 15:12:19,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 14974 transitions. [2021-10-07 15:12:19,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:12:19,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:19,695 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:19,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:19,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:19,895 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1655977256, now seen corresponding path program 20 times [2021-10-07 15:12:19,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:19,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36654588] [2021-10-07 15:12:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:19,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:20,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:20,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36654588] [2021-10-07 15:12:20,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36654588] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:20,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255909851] [2021-10-07 15:12:20,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:12:20,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:20,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:20,570 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:20,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-07 15:12:22,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:12:22,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:22,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-07 15:12:22,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:12:22,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:12:22,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:22,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:23,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:12:23,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:12:23,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:12:23,200 INFO L354 Elim1Store]: treesize reduction 114, result has 24.0 percent of original size [2021-10-07 15:12:23,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 62 [2021-10-07 15:12:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:23,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255909851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:23,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:23,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 25 [2021-10-07 15:12:23,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786310508] [2021-10-07 15:12:23,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:12:23,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:12:23,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:12:23,419 INFO L87 Difference]: Start difference. First operand 4459 states and 14974 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:25,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:25,584 INFO L93 Difference]: Finished difference Result 5222 states and 16975 transitions. [2021-10-07 15:12:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 15:12:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:25,596 INFO L225 Difference]: With dead ends: 5222 [2021-10-07 15:12:25,596 INFO L226 Difference]: Without dead ends: 5202 [2021-10-07 15:12:25,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1871.3ms TimeCoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:12:25,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2021-10-07 15:12:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 4435. [2021-10-07 15:12:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4435 states, 4429 states have (on average 3.358320162564913) internal successors, (14874), 4434 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4435 states to 4435 states and 14874 transitions. [2021-10-07 15:12:25,680 INFO L78 Accepts]: Start accepts. Automaton has 4435 states and 14874 transitions. Word has length 22 [2021-10-07 15:12:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:25,680 INFO L470 AbstractCegarLoop]: Abstraction has 4435 states and 14874 transitions. [2021-10-07 15:12:25,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4435 states and 14874 transitions. [2021-10-07 15:12:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:12:25,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:25,682 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:25,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:25,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-10-07 15:12:25,883 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:25,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1651835036, now seen corresponding path program 21 times [2021-10-07 15:12:25,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:25,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988767706] [2021-10-07 15:12:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:25,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:12:26,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:26,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988767706] [2021-10-07 15:12:26,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988767706] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:26,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92935957] [2021-10-07 15:12:26,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:12:26,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:26,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:26,068 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:26,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-07 15:12:27,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:12:27,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-07 15:12:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:27,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:12:27,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:27,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:28,684 INFO L354 Elim1Store]: treesize reduction 258, result has 15.7 percent of original size [2021-10-07 15:12:28,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 88 treesize of output 87 [2021-10-07 15:12:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:28,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92935957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:28,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:28,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 21 [2021-10-07 15:12:28,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287202946] [2021-10-07 15:12:28,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 15:12:28,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:28,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 15:12:28,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:12:28,768 INFO L87 Difference]: Start difference. First operand 4435 states and 14874 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:30,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:30,636 INFO L93 Difference]: Finished difference Result 6436 states and 20638 transitions. [2021-10-07 15:12:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:12:30,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:30,651 INFO L225 Difference]: With dead ends: 6436 [2021-10-07 15:12:30,651 INFO L226 Difference]: Without dead ends: 5978 [2021-10-07 15:12:30,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1369.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-10-07 15:12:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5978 states. [2021-10-07 15:12:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5978 to 4601. [2021-10-07 15:12:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4595 states have (on average 3.362132752992383) internal successors, (15449), 4600 states have internal predecessors, (15449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 15449 transitions. [2021-10-07 15:12:30,762 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 15449 transitions. Word has length 22 [2021-10-07 15:12:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:30,762 INFO L470 AbstractCegarLoop]: Abstraction has 4601 states and 15449 transitions. [2021-10-07 15:12:30,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 15449 transitions. [2021-10-07 15:12:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:12:30,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:30,765 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:30,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:30,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:30,965 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:30,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1663606872, now seen corresponding path program 22 times [2021-10-07 15:12:30,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:30,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981309332] [2021-10-07 15:12:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:30,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:31,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:31,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981309332] [2021-10-07 15:12:31,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981309332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:31,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143138140] [2021-10-07 15:12:31,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:12:31,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:31,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:31,809 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:31,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-07 15:12:33,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:12:33,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-07 15:12:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:33,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 483 treesize of output 475 [2021-10-07 15:12:34,355 INFO L354 Elim1Store]: treesize reduction 156, result has 17.9 percent of original size [2021-10-07 15:12:34,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 75 [2021-10-07 15:12:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:34,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143138140] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:34,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:34,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 26 [2021-10-07 15:12:34,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259454972] [2021-10-07 15:12:34,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:12:34,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:34,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:12:34,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:12:34,883 INFO L87 Difference]: Start difference. First operand 4601 states and 15449 transitions. Second operand has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:36,608 INFO L93 Difference]: Finished difference Result 4996 states and 16564 transitions. [2021-10-07 15:12:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:12:36,609 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:36,619 INFO L225 Difference]: With dead ends: 4996 [2021-10-07 15:12:36,619 INFO L226 Difference]: Without dead ends: 4996 [2021-10-07 15:12:36,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1694.5ms TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-10-07 15:12:36,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-10-07 15:12:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4731. [2021-10-07 15:12:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4731 states, 4725 states have (on average 3.3595767195767197) internal successors, (15874), 4730 states have internal predecessors, (15874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4731 states to 4731 states and 15874 transitions. [2021-10-07 15:12:36,705 INFO L78 Accepts]: Start accepts. Automaton has 4731 states and 15874 transitions. Word has length 22 [2021-10-07 15:12:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:36,705 INFO L470 AbstractCegarLoop]: Abstraction has 4731 states and 15874 transitions. [2021-10-07 15:12:36,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 27 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4731 states and 15874 transitions. [2021-10-07 15:12:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:12:36,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:36,708 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:36,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:36,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-07 15:12:36,909 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:36,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1663606871, now seen corresponding path program 10 times [2021-10-07 15:12:36,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:36,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801245539] [2021-10-07 15:12:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:36,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:12:37,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:37,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801245539] [2021-10-07 15:12:37,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801245539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:37,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719997765] [2021-10-07 15:12:37,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:12:37,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:37,062 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:37,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-07 15:12:38,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:12:38,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:38,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-07 15:12:38,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:38,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 79 [2021-10-07 15:12:39,140 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:12:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:12:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:39,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719997765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:39,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:39,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 20 [2021-10-07 15:12:39,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715572802] [2021-10-07 15:12:39,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 15:12:39,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 15:12:39,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:12:39,364 INFO L87 Difference]: Start difference. First operand 4731 states and 15874 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:41,395 INFO L93 Difference]: Finished difference Result 7075 states and 22730 transitions. [2021-10-07 15:12:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-07 15:12:41,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:41,411 INFO L225 Difference]: With dead ends: 7075 [2021-10-07 15:12:41,411 INFO L226 Difference]: Without dead ends: 7075 [2021-10-07 15:12:41,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1249.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1711, Unknown=0, NotChecked=0, Total=1980 [2021-10-07 15:12:41,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2021-10-07 15:12:41,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 4731. [2021-10-07 15:12:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4731 states, 4725 states have (on average 3.365925925925926) internal successors, (15904), 4730 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4731 states to 4731 states and 15904 transitions. [2021-10-07 15:12:41,515 INFO L78 Accepts]: Start accepts. Automaton has 4731 states and 15904 transitions. Word has length 22 [2021-10-07 15:12:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:41,515 INFO L470 AbstractCegarLoop]: Abstraction has 4731 states and 15904 transitions. [2021-10-07 15:12:41,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4731 states and 15904 transitions. [2021-10-07 15:12:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:12:41,518 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:41,518 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:41,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:41,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-07 15:12:41,719 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:41,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1349312996, now seen corresponding path program 23 times [2021-10-07 15:12:41,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:41,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251411460] [2021-10-07 15:12:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:41,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:42,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:42,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251411460] [2021-10-07 15:12:42,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251411460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:42,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612467057] [2021-10-07 15:12:42,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:12:42,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:42,281 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:42,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-07 15:12:43,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:12:43,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:43,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-07 15:12:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:43,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 79 [2021-10-07 15:12:44,990 INFO L354 Elim1Store]: treesize reduction 161, result has 17.9 percent of original size [2021-10-07 15:12:44,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 71 [2021-10-07 15:12:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:45,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612467057] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:45,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:45,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-10-07 15:12:45,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764411690] [2021-10-07 15:12:45,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:12:45,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:12:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:12:45,288 INFO L87 Difference]: Start difference. First operand 4731 states and 15904 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:47,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:47,039 INFO L93 Difference]: Finished difference Result 4973 states and 16477 transitions. [2021-10-07 15:12:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-07 15:12:47,039 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:47,052 INFO L225 Difference]: With dead ends: 4973 [2021-10-07 15:12:47,052 INFO L226 Difference]: Without dead ends: 4973 [2021-10-07 15:12:47,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1630.1ms TimeCoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:12:47,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-10-07 15:12:47,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4701. [2021-10-07 15:12:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 4695 states have (on average 3.3640042598509052) internal successors, (15794), 4700 states have internal predecessors, (15794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 15794 transitions. [2021-10-07 15:12:47,143 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 15794 transitions. Word has length 22 [2021-10-07 15:12:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:47,143 INFO L470 AbstractCegarLoop]: Abstraction has 4701 states and 15794 transitions. [2021-10-07 15:12:47,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 15794 transitions. [2021-10-07 15:12:47,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-07 15:12:47,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:47,146 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:47,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:47,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-10-07 15:12:47,404 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1353455216, now seen corresponding path program 24 times [2021-10-07 15:12:47,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:47,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787058703] [2021-10-07 15:12:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:47,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:48,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:48,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787058703] [2021-10-07 15:12:48,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787058703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:48,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866669430] [2021-10-07 15:12:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:12:48,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:48,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:48,227 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:48,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-07 15:12:50,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:12:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:12:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-07 15:12:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:50,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:12:50,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:50,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:12:51,046 INFO L354 Elim1Store]: treesize reduction 166, result has 17.8 percent of original size [2021-10-07 15:12:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 64 [2021-10-07 15:12:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:51,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866669430] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:51,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:51,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 25 [2021-10-07 15:12:51,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203319791] [2021-10-07 15:12:51,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:12:51,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:12:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:12:51,137 INFO L87 Difference]: Start difference. First operand 4701 states and 15794 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:12:53,186 INFO L93 Difference]: Finished difference Result 4952 states and 16395 transitions. [2021-10-07 15:12:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-07 15:12:53,187 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-07 15:12:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:12:53,198 INFO L225 Difference]: With dead ends: 4952 [2021-10-07 15:12:53,199 INFO L226 Difference]: Without dead ends: 4952 [2021-10-07 15:12:53,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2066.5ms TimeCoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:12:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4952 states. [2021-10-07 15:12:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4952 to 4671. [2021-10-07 15:12:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4665 states have (on average 3.3588424437299036) internal successors, (15669), 4670 states have internal predecessors, (15669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 15669 transitions. [2021-10-07 15:12:53,284 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 15669 transitions. Word has length 22 [2021-10-07 15:12:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:12:53,284 INFO L470 AbstractCegarLoop]: Abstraction has 4671 states and 15669 transitions. [2021-10-07 15:12:53,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:12:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 15669 transitions. [2021-10-07 15:12:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:12:53,286 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:12:53,287 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:12:53,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-10-07 15:12:53,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:53,488 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:12:53,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:12:53,489 INFO L82 PathProgramCache]: Analyzing trace with hash -402406629, now seen corresponding path program 25 times [2021-10-07 15:12:53,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:12:53,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315908748] [2021-10-07 15:12:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:12:53,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:12:53,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:12:55,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:12:55,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315908748] [2021-10-07 15:12:55,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315908748] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:55,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815993378] [2021-10-07 15:12:55,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:12:55,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:12:55,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:12:55,209 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:12:55,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-07 15:12:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:12:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-07 15:12:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:12:57,517 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:12:57,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-10-07 15:12:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:12:57,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815993378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:12:57,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:12:57,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-10-07 15:12:57,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842633834] [2021-10-07 15:12:57,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:12:57,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:12:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:12:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:12:57,916 INFO L87 Difference]: Start difference. First operand 4671 states and 15669 transitions. Second operand has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:01,508 INFO L93 Difference]: Finished difference Result 6563 states and 21346 transitions. [2021-10-07 15:13:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:13:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:13:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:01,523 INFO L225 Difference]: With dead ends: 6563 [2021-10-07 15:13:01,523 INFO L226 Difference]: Without dead ends: 6483 [2021-10-07 15:13:01,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2750.5ms TimeCoverageRelationStatistics Valid=161, Invalid=1645, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:13:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6483 states. [2021-10-07 15:13:01,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6483 to 4711. [2021-10-07 15:13:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4711 states, 4705 states have (on average 3.3536663124335813) internal successors, (15779), 4710 states have internal predecessors, (15779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 15779 transitions. [2021-10-07 15:13:01,616 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 15779 transitions. Word has length 23 [2021-10-07 15:13:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:01,616 INFO L470 AbstractCegarLoop]: Abstraction has 4711 states and 15779 transitions. [2021-10-07 15:13:01,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 15779 transitions. [2021-10-07 15:13:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:13:01,619 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:01,619 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:01,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:01,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-10-07 15:13:01,820 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1160531877, now seen corresponding path program 26 times [2021-10-07 15:13:01,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:01,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614708779] [2021-10-07 15:13:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:01,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:13:02,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:02,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614708779] [2021-10-07 15:13:02,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614708779] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:02,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231114420] [2021-10-07 15:13:02,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:13:02,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:02,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:02,027 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:02,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-07 15:13:03,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:13:03,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:03,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-07 15:13:03,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:04,314 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-10-07 15:13:04,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-10-07 15:13:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:13:04,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231114420] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:04,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:04,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 19 [2021-10-07 15:13:04,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355840106] [2021-10-07 15:13:04,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 15:13:04,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:04,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 15:13:04,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:13:04,495 INFO L87 Difference]: Start difference. First operand 4711 states and 15779 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:05,124 INFO L93 Difference]: Finished difference Result 5995 states and 19685 transitions. [2021-10-07 15:13:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-07 15:13:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:13:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:05,137 INFO L225 Difference]: With dead ends: 5995 [2021-10-07 15:13:05,137 INFO L226 Difference]: Without dead ends: 5955 [2021-10-07 15:13:05,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:13:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5955 states. [2021-10-07 15:13:05,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5955 to 4451. [2021-10-07 15:13:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4451 states, 4445 states have (on average 3.378177727784027) internal successors, (15016), 4450 states have internal predecessors, (15016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4451 states to 4451 states and 15016 transitions. [2021-10-07 15:13:05,230 INFO L78 Accepts]: Start accepts. Automaton has 4451 states and 15016 transitions. Word has length 23 [2021-10-07 15:13:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:05,230 INFO L470 AbstractCegarLoop]: Abstraction has 4451 states and 15016 transitions. [2021-10-07 15:13:05,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4451 states and 15016 transitions. [2021-10-07 15:13:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:13:05,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:05,232 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:05,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:05,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,66 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:05,433 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:05,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1275823047, now seen corresponding path program 27 times [2021-10-07 15:13:05,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:05,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281068308] [2021-10-07 15:13:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:05,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:13:05,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:05,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281068308] [2021-10-07 15:13:05,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281068308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:05,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459006040] [2021-10-07 15:13:05,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:13:05,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:05,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:05,664 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:05,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-07 15:13:07,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:13:07,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:07,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-07 15:13:07,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:07,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-07 15:13:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:13:07,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2021-10-07 15:13:07,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:13:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:13:07,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:13:07,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-10-07 15:13:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:13:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:13:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:13:07,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-07 15:13:08,012 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-07 15:13:08,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 33 [2021-10-07 15:13:08,145 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-07 15:13:08,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 33 [2021-10-07 15:13:08,977 INFO L354 Elim1Store]: treesize reduction 278, result has 18.2 percent of original size [2021-10-07 15:13:08,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 84 treesize of output 107 [2021-10-07 15:13:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:09,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459006040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:09,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:09,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 23 [2021-10-07 15:13:09,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021049002] [2021-10-07 15:13:09,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:13:09,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:09,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:13:09,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:13:09,519 INFO L87 Difference]: Start difference. First operand 4451 states and 15016 transitions. Second operand has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:13,372 INFO L93 Difference]: Finished difference Result 6647 states and 21618 transitions. [2021-10-07 15:13:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:13:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:13:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:13,388 INFO L225 Difference]: With dead ends: 6647 [2021-10-07 15:13:13,388 INFO L226 Difference]: Without dead ends: 6475 [2021-10-07 15:13:13,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2736.3ms TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:13:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6475 states. [2021-10-07 15:13:13,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6475 to 5003. [2021-10-07 15:13:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5003 states, 4997 states have (on average 3.365619371622974) internal successors, (16818), 5002 states have internal predecessors, (16818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:13,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5003 states to 5003 states and 16818 transitions. [2021-10-07 15:13:13,499 INFO L78 Accepts]: Start accepts. Automaton has 5003 states and 16818 transitions. Word has length 23 [2021-10-07 15:13:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:13,499 INFO L470 AbstractCegarLoop]: Abstraction has 5003 states and 16818 transitions. [2021-10-07 15:13:13,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 5003 states and 16818 transitions. [2021-10-07 15:13:13,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:13:13,502 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:13,502 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:13,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:13,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:13,703 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash 506744347, now seen corresponding path program 28 times [2021-10-07 15:13:13,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:13,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998558287] [2021-10-07 15:13:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:13,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:13:13,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:13,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998558287] [2021-10-07 15:13:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998558287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:13,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081756256] [2021-10-07 15:13:13,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:13:13,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:13,884 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:13,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-10-07 15:13:15,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:13:15,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-07 15:13:15,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:15,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 811 treesize of output 779 [2021-10-07 15:13:16,248 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-10-07 15:13:16,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 43 [2021-10-07 15:13:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:13:16,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081756256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:16,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:16,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 19 [2021-10-07 15:13:16,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417689450] [2021-10-07 15:13:16,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 15:13:16,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:16,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 15:13:16,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:13:16,462 INFO L87 Difference]: Start difference. First operand 5003 states and 16818 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:17,381 INFO L93 Difference]: Finished difference Result 6899 states and 22118 transitions. [2021-10-07 15:13:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-07 15:13:17,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:13:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:17,397 INFO L225 Difference]: With dead ends: 6899 [2021-10-07 15:13:17,398 INFO L226 Difference]: Without dead ends: 6803 [2021-10-07 15:13:17,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-10-07 15:13:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6803 states. [2021-10-07 15:13:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6803 to 5014. [2021-10-07 15:13:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5014 states, 5008 states have (on average 3.328873801916933) internal successors, (16671), 5013 states have internal predecessors, (16671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5014 states to 5014 states and 16671 transitions. [2021-10-07 15:13:17,507 INFO L78 Accepts]: Start accepts. Automaton has 5014 states and 16671 transitions. Word has length 23 [2021-10-07 15:13:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:17,507 INFO L470 AbstractCegarLoop]: Abstraction has 5014 states and 16671 transitions. [2021-10-07 15:13:17,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5014 states and 16671 transitions. [2021-10-07 15:13:17,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:13:17,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:17,510 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:17,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-10-07 15:13:17,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-10-07 15:13:17,711 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:17,711 INFO L82 PathProgramCache]: Analyzing trace with hash 647972089, now seen corresponding path program 29 times [2021-10-07 15:13:17,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:17,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362026320] [2021-10-07 15:13:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:17,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:19,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:19,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362026320] [2021-10-07 15:13:19,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362026320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:19,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555060406] [2021-10-07 15:13:19,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:13:19,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:19,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:19,044 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:19,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-10-07 15:13:20,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:13:20,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-07 15:13:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:21,470 INFO L354 Elim1Store]: treesize reduction 166, result has 17.8 percent of original size [2021-10-07 15:13:21,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 59 [2021-10-07 15:13:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:13:21,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555060406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:21,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:21,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 23 [2021-10-07 15:13:21,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531983499] [2021-10-07 15:13:21,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:13:21,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:13:21,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:13:21,693 INFO L87 Difference]: Start difference. First operand 5014 states and 16671 transitions. Second operand has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:25,661 INFO L93 Difference]: Finished difference Result 6971 states and 22572 transitions. [2021-10-07 15:13:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:13:25,661 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:13:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:25,677 INFO L225 Difference]: With dead ends: 6971 [2021-10-07 15:13:25,677 INFO L226 Difference]: Without dead ends: 6971 [2021-10-07 15:13:25,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2929.7ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-10-07 15:13:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6971 states. [2021-10-07 15:13:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6971 to 4874. [2021-10-07 15:13:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4868 states have (on average 3.3342235004108463) internal successors, (16231), 4873 states have internal predecessors, (16231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 16231 transitions. [2021-10-07 15:13:25,777 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 16231 transitions. Word has length 23 [2021-10-07 15:13:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:25,778 INFO L470 AbstractCegarLoop]: Abstraction has 4874 states and 16231 transitions. [2021-10-07 15:13:25,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 16231 transitions. [2021-10-07 15:13:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:13:25,780 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:25,780 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:25,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:25,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,69 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:25,981 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash 962265965, now seen corresponding path program 30 times [2021-10-07 15:13:25,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:25,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658320648] [2021-10-07 15:13:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:25,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:27,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:27,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658320648] [2021-10-07 15:13:27,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658320648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:27,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827495872] [2021-10-07 15:13:27,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:13:27,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:27,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:27,193 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:27,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-10-07 15:13:29,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:13:29,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:29,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-07 15:13:29,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:29,832 INFO L354 Elim1Store]: treesize reduction 166, result has 17.8 percent of original size [2021-10-07 15:13:29,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 62 [2021-10-07 15:13:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:13:29,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827495872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:29,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:29,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-10-07 15:13:29,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195499483] [2021-10-07 15:13:29,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:13:29,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:29,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:13:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:13:29,981 INFO L87 Difference]: Start difference. First operand 4874 states and 16231 transitions. Second operand has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:32,591 INFO L93 Difference]: Finished difference Result 5724 states and 18909 transitions. [2021-10-07 15:13:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-07 15:13:32,591 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:13:32,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:32,604 INFO L225 Difference]: With dead ends: 5724 [2021-10-07 15:13:32,604 INFO L226 Difference]: Without dead ends: 5724 [2021-10-07 15:13:32,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1954.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 15:13:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5724 states. [2021-10-07 15:13:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5724 to 4944. [2021-10-07 15:13:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 4938 states have (on average 3.3315107330903198) internal successors, (16451), 4943 states have internal predecessors, (16451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 16451 transitions. [2021-10-07 15:13:32,699 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 16451 transitions. Word has length 23 [2021-10-07 15:13:32,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:32,699 INFO L470 AbstractCegarLoop]: Abstraction has 4944 states and 16451 transitions. [2021-10-07 15:13:32,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 16451 transitions. [2021-10-07 15:13:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:13:32,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:32,702 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:32,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-10-07 15:13:32,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-10-07 15:13:32,903 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:32,905 INFO L82 PathProgramCache]: Analyzing trace with hash 962265966, now seen corresponding path program 11 times [2021-10-07 15:13:32,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:32,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486113932] [2021-10-07 15:13:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:32,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:33,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:33,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486113932] [2021-10-07 15:13:33,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486113932] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:33,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018167145] [2021-10-07 15:13:33,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:13:33,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:33,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:33,780 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:33,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-10-07 15:13:35,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-07 15:13:35,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:35,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-07 15:13:35,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:36,424 INFO L354 Elim1Store]: treesize reduction 166, result has 17.8 percent of original size [2021-10-07 15:13:36,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 62 [2021-10-07 15:13:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:13:36,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018167145] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:36,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:36,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 22 [2021-10-07 15:13:36,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425274590] [2021-10-07 15:13:36,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:13:36,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:36,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:13:36,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:13:36,564 INFO L87 Difference]: Start difference. First operand 4944 states and 16451 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:38,807 INFO L93 Difference]: Finished difference Result 5654 states and 18689 transitions. [2021-10-07 15:13:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:13:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:13:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:38,821 INFO L225 Difference]: With dead ends: 5654 [2021-10-07 15:13:38,821 INFO L226 Difference]: Without dead ends: 5654 [2021-10-07 15:13:38,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1603.3ms TimeCoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-10-07 15:13:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5654 states. [2021-10-07 15:13:38,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5654 to 4874. [2021-10-07 15:13:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4874 states, 4868 states have (on average 3.3342235004108463) internal successors, (16231), 4873 states have internal predecessors, (16231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:38,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4874 states to 4874 states and 16231 transitions. [2021-10-07 15:13:38,913 INFO L78 Accepts]: Start accepts. Automaton has 4874 states and 16231 transitions. Word has length 23 [2021-10-07 15:13:38,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:38,913 INFO L470 AbstractCegarLoop]: Abstraction has 4874 states and 16231 transitions. [2021-10-07 15:13:38,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4874 states and 16231 transitions. [2021-10-07 15:13:38,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:13:38,916 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:38,916 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:38,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:39,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:39,117 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:39,118 INFO L82 PathProgramCache]: Analyzing trace with hash 958123745, now seen corresponding path program 31 times [2021-10-07 15:13:39,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:39,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397738895] [2021-10-07 15:13:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:39,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:40,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:40,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397738895] [2021-10-07 15:13:40,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397738895] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:40,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952891423] [2021-10-07 15:13:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:13:40,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:40,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:40,048 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:40,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-10-07 15:13:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:42,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-07 15:13:42,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:42,881 INFO L354 Elim1Store]: treesize reduction 166, result has 17.8 percent of original size [2021-10-07 15:13:42,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 64 [2021-10-07 15:13:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:13:42,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952891423] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:42,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:42,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2021-10-07 15:13:42,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996693150] [2021-10-07 15:13:42,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-07 15:13:42,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:42,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-07 15:13:42,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-10-07 15:13:42,955 INFO L87 Difference]: Start difference. First operand 4874 states and 16231 transitions. Second operand has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:45,214 INFO L93 Difference]: Finished difference Result 5554 states and 18359 transitions. [2021-10-07 15:13:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:13:45,214 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:13:45,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:45,226 INFO L225 Difference]: With dead ends: 5554 [2021-10-07 15:13:45,226 INFO L226 Difference]: Without dead ends: 5554 [2021-10-07 15:13:45,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1680.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2021-10-07 15:13:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2021-10-07 15:13:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 4860. [2021-10-07 15:13:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4854 states have (on average 3.334775442933663) internal successors, (16187), 4859 states have internal predecessors, (16187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 16187 transitions. [2021-10-07 15:13:45,316 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 16187 transitions. Word has length 23 [2021-10-07 15:13:45,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:45,316 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 16187 transitions. [2021-10-07 15:13:45,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 16187 transitions. [2021-10-07 15:13:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:13:45,318 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:45,319 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:45,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:45,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-10-07 15:13:45,519 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:45,520 INFO L82 PathProgramCache]: Analyzing trace with hash 958123746, now seen corresponding path program 12 times [2021-10-07 15:13:45,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:45,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130159117] [2021-10-07 15:13:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:45,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:46,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:46,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130159117] [2021-10-07 15:13:46,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130159117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:46,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52260178] [2021-10-07 15:13:46,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:13:46,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:46,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:46,603 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:46,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-10-07 15:13:48,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-07 15:13:48,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-07 15:13:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:48,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-10-07 15:13:49,214 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:13:49,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-07 15:13:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:13:49,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52260178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:49,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:49,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2021-10-07 15:13:49,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664199160] [2021-10-07 15:13:49,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:13:49,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:13:49,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:13:49,256 INFO L87 Difference]: Start difference. First operand 4860 states and 16187 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:52,859 INFO L93 Difference]: Finished difference Result 6779 states and 21868 transitions. [2021-10-07 15:13:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:13:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-07 15:13:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:52,877 INFO L225 Difference]: With dead ends: 6779 [2021-10-07 15:13:52,877 INFO L226 Difference]: Without dead ends: 6779 [2021-10-07 15:13:52,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2339.9ms TimeCoverageRelationStatistics Valid=241, Invalid=2015, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:13:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-10-07 15:13:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 4708. [2021-10-07 15:13:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4702 states have (on average 3.325818800510421) internal successors, (15638), 4707 states have internal predecessors, (15638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 15638 transitions. [2021-10-07 15:13:52,995 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 15638 transitions. Word has length 23 [2021-10-07 15:13:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:52,995 INFO L470 AbstractCegarLoop]: Abstraction has 4708 states and 15638 transitions. [2021-10-07 15:13:52,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 15638 transitions. [2021-10-07 15:13:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-07 15:13:52,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:52,998 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:53,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:53,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-10-07 15:13:53,199 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:53,200 INFO L82 PathProgramCache]: Analyzing trace with hash 992428042, now seen corresponding path program 11 times [2021-10-07 15:13:53,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:53,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317470477] [2021-10-07 15:13:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:53,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-07 15:13:53,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:53,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317470477] [2021-10-07 15:13:53,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317470477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:53,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850319910] [2021-10-07 15:13:53,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:13:53,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:53,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:53,257 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:53,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-10-07 15:13:55,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-07 15:13:55,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:55,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-07 15:13:55,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:13:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-07 15:13:55,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850319910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:55,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:13:55,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-07 15:13:55,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139502696] [2021-10-07 15:13:55,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 15:13:55,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:13:55,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 15:13:55,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:13:55,351 INFO L87 Difference]: Start difference. First operand 4708 states and 15638 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-10-07 15:13:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:13:55,434 INFO L93 Difference]: Finished difference Result 6649 states and 21905 transitions. [2021-10-07 15:13:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 15:13:55,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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 23 [2021-10-07 15:13:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:13:55,449 INFO L225 Difference]: With dead ends: 6649 [2021-10-07 15:13:55,449 INFO L226 Difference]: Without dead ends: 6447 [2021-10-07 15:13:55,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-07 15:13:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2021-10-07 15:13:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 5774. [2021-10-07 15:13:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5774 states, 5768 states have (on average 3.405859916782247) internal successors, (19645), 5773 states have internal predecessors, (19645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:13:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5774 states to 5774 states and 19645 transitions. [2021-10-07 15:13:55,562 INFO L78 Accepts]: Start accepts. Automaton has 5774 states and 19645 transitions. Word has length 23 [2021-10-07 15:13:55,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:13:55,562 INFO L470 AbstractCegarLoop]: Abstraction has 5774 states and 19645 transitions. [2021-10-07 15:13:55,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-10-07 15:13:55,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5774 states and 19645 transitions. [2021-10-07 15:13:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-07 15:13:55,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:13:55,565 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:13:55,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-10-07 15:13:55,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:55,766 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:13:55,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:13:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1659505788, now seen corresponding path program 32 times [2021-10-07 15:13:55,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:13:55,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791431677] [2021-10-07 15:13:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:13:55,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:13:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:13:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:13:57,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:13:57,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791431677] [2021-10-07 15:13:57,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791431677] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:13:57,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209748882] [2021-10-07 15:13:57,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:13:57,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:13:57,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:13:57,715 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:13:57,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-10-07 15:13:59,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:13:59,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:13:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-07 15:13:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:00,739 INFO L354 Elim1Store]: treesize reduction 166, result has 17.8 percent of original size [2021-10-07 15:14:00,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 64 [2021-10-07 15:14:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:14:00,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209748882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:00,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:00,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 28 [2021-10-07 15:14:00,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042097660] [2021-10-07 15:14:00,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:14:00,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:14:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:14:00,819 INFO L87 Difference]: Start difference. First operand 5774 states and 19645 transitions. Second operand has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:05,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:05,353 INFO L93 Difference]: Finished difference Result 8600 states and 28414 transitions. [2021-10-07 15:14:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:14:05,354 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-07 15:14:05,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:05,373 INFO L225 Difference]: With dead ends: 8600 [2021-10-07 15:14:05,373 INFO L226 Difference]: Without dead ends: 8544 [2021-10-07 15:14:05,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 3630.2ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-10-07 15:14:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8544 states. [2021-10-07 15:14:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8544 to 5916. [2021-10-07 15:14:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5916 states, 5910 states have (on average 3.3957698815566837) internal successors, (20069), 5915 states have internal predecessors, (20069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5916 states to 5916 states and 20069 transitions. [2021-10-07 15:14:05,511 INFO L78 Accepts]: Start accepts. Automaton has 5916 states and 20069 transitions. Word has length 24 [2021-10-07 15:14:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:05,511 INFO L470 AbstractCegarLoop]: Abstraction has 5916 states and 20069 transitions. [2021-10-07 15:14:05,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:05,511 INFO L276 IsEmpty]: Start isEmpty. Operand 5916 states and 20069 transitions. [2021-10-07 15:14:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:14:05,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:05,515 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:05,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-10-07 15:14:05,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:05,715 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:14:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1650136353, now seen corresponding path program 13 times [2021-10-07 15:14:05,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:05,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804491498] [2021-10-07 15:14:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:05,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:14:05,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:05,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804491498] [2021-10-07 15:14:05,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804491498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:05,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707552103] [2021-10-07 15:14:05,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:14:05,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:05,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:05,884 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:14:05,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-10-07 15:14:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-07 15:14:07,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:14:08,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707552103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:08,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:08,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-10-07 15:14:08,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366789469] [2021-10-07 15:14:08,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-07 15:14:08,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-07 15:14:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-07 15:14:08,155 INFO L87 Difference]: Start difference. First operand 5916 states and 20069 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2021-10-07 15:14:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:08,410 INFO L93 Difference]: Finished difference Result 7516 states and 24542 transitions. [2021-10-07 15:14:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-07 15:14:08,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 25 [2021-10-07 15:14:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:08,427 INFO L225 Difference]: With dead ends: 7516 [2021-10-07 15:14:08,427 INFO L226 Difference]: Without dead ends: 7516 [2021-10-07 15:14:08,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-07 15:14:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-10-07 15:14:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 5292. [2021-10-07 15:14:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5292 states, 5286 states have (on average 3.356602345819145) internal successors, (17743), 5291 states have internal predecessors, (17743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 17743 transitions. [2021-10-07 15:14:08,541 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 17743 transitions. Word has length 25 [2021-10-07 15:14:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:08,541 INFO L470 AbstractCegarLoop]: Abstraction has 5292 states and 17743 transitions. [2021-10-07 15:14:08,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2021-10-07 15:14:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 17743 transitions. [2021-10-07 15:14:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-07 15:14:08,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:08,545 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:08,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-10-07 15:14:08,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-10-07 15:14:08,745 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:14:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash 159655862, now seen corresponding path program 13 times [2021-10-07 15:14:08,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:08,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796837764] [2021-10-07 15:14:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:08,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:14:08,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:08,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796837764] [2021-10-07 15:14:08,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796837764] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:08,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046829317] [2021-10-07 15:14:08,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:14:08,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:08,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:08,890 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:14:08,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-10-07 15:14:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:10,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-07 15:14:10,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:11,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046829317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:11,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:11,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2021-10-07 15:14:11,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686112045] [2021-10-07 15:14:11,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:14:11,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:14:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:14:11,452 INFO L87 Difference]: Start difference. First operand 5292 states and 17743 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:12,485 INFO L93 Difference]: Finished difference Result 5002 states and 16707 transitions. [2021-10-07 15:14:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-07 15:14:12,486 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-07 15:14:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:12,497 INFO L225 Difference]: With dead ends: 5002 [2021-10-07 15:14:12,497 INFO L226 Difference]: Without dead ends: 4587 [2021-10-07 15:14:12,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1011.6ms TimeCoverageRelationStatistics Valid=402, Invalid=2148, Unknown=0, NotChecked=0, Total=2550 [2021-10-07 15:14:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2021-10-07 15:14:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 4587. [2021-10-07 15:14:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4581 states have (on average 3.4250163719711852) internal successors, (15690), 4586 states have internal predecessors, (15690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 15690 transitions. [2021-10-07 15:14:12,585 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 15690 transitions. Word has length 25 [2021-10-07 15:14:12,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:12,585 INFO L470 AbstractCegarLoop]: Abstraction has 4587 states and 15690 transitions. [2021-10-07 15:14:12,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 15690 transitions. [2021-10-07 15:14:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:14:12,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:12,588 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:12,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-10-07 15:14:12,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:12,788 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:14:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:12,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1475622842, now seen corresponding path program 12 times [2021-10-07 15:14:12,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:12,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620266575] [2021-10-07 15:14:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:12,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:14,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:14,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620266575] [2021-10-07 15:14:14,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620266575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:14,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841417431] [2021-10-07 15:14:14,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:14:14,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:14,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:14,137 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:14:14,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-07 15:14:16,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-07 15:14:16,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:14:16,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-07 15:14:16,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:16,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:14:16,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:14:16,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:14:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:14:17,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841417431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:17,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:17,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-10-07 15:14:17,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708916775] [2021-10-07 15:14:17,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:14:17,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:14:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:14:17,435 INFO L87 Difference]: Start difference. First operand 4587 states and 15690 transitions. Second operand has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:37,167 INFO L93 Difference]: Finished difference Result 30722 states and 102324 transitions. [2021-10-07 15:14:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-10-07 15:14:37,167 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:14:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:37,255 INFO L225 Difference]: With dead ends: 30722 [2021-10-07 15:14:37,255 INFO L226 Difference]: Without dead ends: 30402 [2021-10-07 15:14:37,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 15554.6ms TimeCoverageRelationStatistics Valid=2564, Invalid=12198, Unknown=0, NotChecked=0, Total=14762 [2021-10-07 15:14:37,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30402 states. [2021-10-07 15:14:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30402 to 12999. [2021-10-07 15:14:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 12993 states have (on average 3.76348803201724) internal successors, (48899), 12998 states have internal predecessors, (48899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 48899 transitions. [2021-10-07 15:14:37,726 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 48899 transitions. Word has length 26 [2021-10-07 15:14:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:37,726 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 48899 transitions. [2021-10-07 15:14:37,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:37,726 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 48899 transitions. [2021-10-07 15:14:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:14:37,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:37,732 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:37,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-10-07 15:14:37,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:37,938 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:14:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1471659182, now seen corresponding path program 13 times [2021-10-07 15:14:37,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:37,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629084131] [2021-10-07 15:14:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:37,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:38,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:38,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629084131] [2021-10-07 15:14:38,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629084131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:38,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468034886] [2021-10-07 15:14:38,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:14:38,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:38,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:38,867 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:14:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-07 15:14:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:41,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-07 15:14:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:41,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-10-07 15:14:41,264 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-07 15:14:41,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 49 [2021-10-07 15:14:41,423 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-10-07 15:14:41,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 56 [2021-10-07 15:14:41,631 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:14:41,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-10-07 15:14:41,861 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:14:41,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-10-07 15:14:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:43,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468034886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:43,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:43,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 28 [2021-10-07 15:14:43,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320205000] [2021-10-07 15:14:43,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:14:43,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:14:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:14:43,459 INFO L87 Difference]: Start difference. First operand 12999 states and 48899 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:14:48,973 INFO L93 Difference]: Finished difference Result 25178 states and 92820 transitions. [2021-10-07 15:14:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:14:48,973 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:14:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:14:49,051 INFO L225 Difference]: With dead ends: 25178 [2021-10-07 15:14:49,051 INFO L226 Difference]: Without dead ends: 25038 [2021-10-07 15:14:49,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 4533.2ms TimeCoverageRelationStatistics Valid=301, Invalid=3121, Unknown=0, NotChecked=0, Total=3422 [2021-10-07 15:14:49,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25038 states. [2021-10-07 15:14:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25038 to 17433. [2021-10-07 15:14:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17433 states, 17427 states have (on average 3.718769725139152) internal successors, (64807), 17432 states have internal predecessors, (64807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:49,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17433 states to 17433 states and 64807 transitions. [2021-10-07 15:14:49,540 INFO L78 Accepts]: Start accepts. Automaton has 17433 states and 64807 transitions. Word has length 26 [2021-10-07 15:14:49,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:14:49,540 INFO L470 AbstractCegarLoop]: Abstraction has 17433 states and 64807 transitions. [2021-10-07 15:14:49,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:14:49,540 INFO L276 IsEmpty]: Start isEmpty. Operand 17433 states and 64807 transitions. [2021-10-07 15:14:49,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:14:49,546 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:14:49,546 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:14:49,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-10-07 15:14:49,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:49,747 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:14:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:14:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2116165318, now seen corresponding path program 14 times [2021-10-07 15:14:49,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:14:49,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53164329] [2021-10-07 15:14:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:14:49,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:14:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:14:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:50,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:14:50,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53164329] [2021-10-07 15:14:50,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53164329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:50,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524098498] [2021-10-07 15:14:50,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:14:50,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:14:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:14:50,759 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:14:50,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-07 15:14:53,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:14:53,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:14:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-07 15:14:53,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:14:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:14:53,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524098498] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:14:53,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:14:53,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:14:53,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951500609] [2021-10-07 15:14:53,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:14:53,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:14:53,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:14:53,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:14:53,946 INFO L87 Difference]: Start difference. First operand 17433 states and 64807 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:05,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:05,386 INFO L93 Difference]: Finished difference Result 19079 states and 62962 transitions. [2021-10-07 15:15:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-07 15:15:05,387 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:15:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:05,437 INFO L225 Difference]: With dead ends: 19079 [2021-10-07 15:15:05,437 INFO L226 Difference]: Without dead ends: 17463 [2021-10-07 15:15:05,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 9814.5ms TimeCoverageRelationStatistics Valid=1917, Invalid=9425, Unknown=0, NotChecked=0, Total=11342 [2021-10-07 15:15:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17463 states. [2021-10-07 15:15:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17463 to 9477. [2021-10-07 15:15:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9477 states, 9471 states have (on average 3.614824200190054) internal successors, (34236), 9476 states have internal predecessors, (34236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9477 states to 9477 states and 34236 transitions. [2021-10-07 15:15:05,755 INFO L78 Accepts]: Start accepts. Automaton has 9477 states and 34236 transitions. Word has length 26 [2021-10-07 15:15:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:05,756 INFO L470 AbstractCegarLoop]: Abstraction has 9477 states and 34236 transitions. [2021-10-07 15:15:05,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 9477 states and 34236 transitions. [2021-10-07 15:15:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:15:05,761 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:05,761 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:05,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-10-07 15:15:05,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:05,972 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:15:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1101104710, now seen corresponding path program 15 times [2021-10-07 15:15:05,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:05,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555486597] [2021-10-07 15:15:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:05,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:06,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:06,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555486597] [2021-10-07 15:15:06,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555486597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:06,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214131990] [2021-10-07 15:15:06,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:15:06,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:06,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:06,849 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:15:06,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-07 15:15:09,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-07 15:15:09,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:15:09,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-07 15:15:09,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:09,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:15:09,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:15:09,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:15:09,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:15:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:15:10,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214131990] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:10,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:10,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 26 [2021-10-07 15:15:10,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882192113] [2021-10-07 15:15:10,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:15:10,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:15:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:15:10,170 INFO L87 Difference]: Start difference. First operand 9477 states and 34236 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:14,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:14,994 INFO L93 Difference]: Finished difference Result 11912 states and 40553 transitions. [2021-10-07 15:15:14,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:15:14,994 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:15:14,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:15,022 INFO L225 Difference]: With dead ends: 11912 [2021-10-07 15:15:15,022 INFO L226 Difference]: Without dead ends: 11792 [2021-10-07 15:15:15,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 3994.7ms TimeCoverageRelationStatistics Valid=487, Invalid=3419, Unknown=0, NotChecked=0, Total=3906 [2021-10-07 15:15:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11792 states. [2021-10-07 15:15:15,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11792 to 9687. [2021-10-07 15:15:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9687 states, 9681 states have (on average 3.6029335812416075) internal successors, (34880), 9686 states have internal predecessors, (34880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9687 states to 9687 states and 34880 transitions. [2021-10-07 15:15:15,241 INFO L78 Accepts]: Start accepts. Automaton has 9687 states and 34880 transitions. Word has length 26 [2021-10-07 15:15:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:15,241 INFO L470 AbstractCegarLoop]: Abstraction has 9687 states and 34880 transitions. [2021-10-07 15:15:15,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:15,242 INFO L276 IsEmpty]: Start isEmpty. Operand 9687 states and 34880 transitions. [2021-10-07 15:15:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:15:15,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:15,246 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:15,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-10-07 15:15:15,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,81 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:15,460 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:15:15,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:15,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1097141051, now seen corresponding path program 14 times [2021-10-07 15:15:15,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:15,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684527335] [2021-10-07 15:15:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:15,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-07 15:15:15,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:15,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684527335] [2021-10-07 15:15:15,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684527335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:15,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229614974] [2021-10-07 15:15:15,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:15:15,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:15,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:15,570 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:15:15,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-07 15:15:18,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:15:18,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:15:18,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-07 15:15:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:15:18,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229614974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:18,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:18,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-10-07 15:15:18,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467542291] [2021-10-07 15:15:18,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:15:18,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:18,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:15:18,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:15:18,460 INFO L87 Difference]: Start difference. First operand 9687 states and 34880 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:19,272 INFO L93 Difference]: Finished difference Result 16238 states and 56017 transitions. [2021-10-07 15:15:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:15:19,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:15:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:19,321 INFO L225 Difference]: With dead ends: 16238 [2021-10-07 15:15:19,321 INFO L226 Difference]: Without dead ends: 16068 [2021-10-07 15:15:19,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:15:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16068 states. [2021-10-07 15:15:19,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16068 to 10753. [2021-10-07 15:15:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10753 states, 10747 states have (on average 3.6126360844886944) internal successors, (38825), 10752 states have internal predecessors, (38825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10753 states to 10753 states and 38825 transitions. [2021-10-07 15:15:19,753 INFO L78 Accepts]: Start accepts. Automaton has 10753 states and 38825 transitions. Word has length 26 [2021-10-07 15:15:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:19,753 INFO L470 AbstractCegarLoop]: Abstraction has 10753 states and 38825 transitions. [2021-10-07 15:15:19,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 10753 states and 38825 transitions. [2021-10-07 15:15:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:15:19,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:19,759 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:19,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-10-07 15:15:19,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-10-07 15:15:19,973 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:15:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1097141050, now seen corresponding path program 16 times [2021-10-07 15:15:19,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:19,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512824030] [2021-10-07 15:15:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:19,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:21,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:21,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512824030] [2021-10-07 15:15:21,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512824030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:21,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815111523] [2021-10-07 15:15:21,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:15:21,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:21,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:21,514 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:15:21,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-07 15:15:23,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:15:23,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:15:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 15:15:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-07 15:15:24,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815111523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:24,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:24,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 21 [2021-10-07 15:15:24,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388812977] [2021-10-07 15:15:24,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 15:15:24,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 15:15:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:15:24,268 INFO L87 Difference]: Start difference. First operand 10753 states and 38825 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:27,707 INFO L93 Difference]: Finished difference Result 12873 states and 44926 transitions. [2021-10-07 15:15:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:15:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:15:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:27,741 INFO L225 Difference]: With dead ends: 12873 [2021-10-07 15:15:27,741 INFO L226 Difference]: Without dead ends: 12623 [2021-10-07 15:15:27,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2627.2ms TimeCoverageRelationStatistics Valid=212, Invalid=2044, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:15:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-10-07 15:15:28,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 11491. [2021-10-07 15:15:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11491 states, 11485 states have (on average 3.611406181976491) internal successors, (41477), 11490 states have internal predecessors, (41477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11491 states to 11491 states and 41477 transitions. [2021-10-07 15:15:28,110 INFO L78 Accepts]: Start accepts. Automaton has 11491 states and 41477 transitions. Word has length 26 [2021-10-07 15:15:28,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:28,111 INFO L470 AbstractCegarLoop]: Abstraction has 11491 states and 41477 transitions. [2021-10-07 15:15:28,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:28,111 INFO L276 IsEmpty]: Start isEmpty. Operand 11491 states and 41477 transitions. [2021-10-07 15:15:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:15:28,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:28,115 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:28,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-10-07 15:15:28,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,83 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:28,316 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:15:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1583031087, now seen corresponding path program 15 times [2021-10-07 15:15:28,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:28,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713845196] [2021-10-07 15:15:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:28,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-07 15:15:28,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:28,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713845196] [2021-10-07 15:15:28,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713845196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:28,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857959577] [2021-10-07 15:15:28,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:15:28,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:28,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:28,434 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:15:28,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-07 15:15:30,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-07 15:15:30,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:15:30,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-07 15:15:30,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:31,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:15:31,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:15:31,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:15:31,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:15:31,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857959577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:31,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:31,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 19 [2021-10-07 15:15:31,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893965871] [2021-10-07 15:15:31,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-07 15:15:31,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:31,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-07 15:15:31,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-10-07 15:15:31,634 INFO L87 Difference]: Start difference. First operand 11491 states and 41477 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:35,606 INFO L93 Difference]: Finished difference Result 17004 states and 56821 transitions. [2021-10-07 15:15:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-07 15:15:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:15:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:35,652 INFO L225 Difference]: With dead ends: 17004 [2021-10-07 15:15:35,652 INFO L226 Difference]: Without dead ends: 16722 [2021-10-07 15:15:35,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 2543.2ms TimeCoverageRelationStatistics Valid=530, Invalid=4162, Unknown=0, NotChecked=0, Total=4692 [2021-10-07 15:15:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16722 states. [2021-10-07 15:15:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16722 to 12260. [2021-10-07 15:15:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12260 states, 12254 states have (on average 3.5941733311571733) internal successors, (44043), 12259 states have internal predecessors, (44043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12260 states to 12260 states and 44043 transitions. [2021-10-07 15:15:36,103 INFO L78 Accepts]: Start accepts. Automaton has 12260 states and 44043 transitions. Word has length 26 [2021-10-07 15:15:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:36,103 INFO L470 AbstractCegarLoop]: Abstraction has 12260 states and 44043 transitions. [2021-10-07 15:15:36,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12260 states and 44043 transitions. [2021-10-07 15:15:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:15:36,108 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:36,108 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:36,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-10-07 15:15:36,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:36,309 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:15:36,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:36,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1583031086, now seen corresponding path program 17 times [2021-10-07 15:15:36,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:36,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491955915] [2021-10-07 15:15:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:36,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:37,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:37,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491955915] [2021-10-07 15:15:37,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491955915] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:37,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70958178] [2021-10-07 15:15:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:15:37,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:37,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:37,673 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:15:37,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-07 15:15:40,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-07 15:15:40,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:15:40,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-07 15:15:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:15:40,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70958178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:40,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:40,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 26 [2021-10-07 15:15:40,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696279314] [2021-10-07 15:15:40,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:15:40,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:40,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:15:40,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:15:40,981 INFO L87 Difference]: Start difference. First operand 12260 states and 44043 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:46,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:46,695 INFO L93 Difference]: Finished difference Result 15945 states and 54910 transitions. [2021-10-07 15:15:46,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-07 15:15:46,696 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:15:46,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:46,741 INFO L225 Difference]: With dead ends: 15945 [2021-10-07 15:15:46,741 INFO L226 Difference]: Without dead ends: 15735 [2021-10-07 15:15:46,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 4181.9ms TimeCoverageRelationStatistics Valid=329, Invalid=3211, Unknown=0, NotChecked=0, Total=3540 [2021-10-07 15:15:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15735 states. [2021-10-07 15:15:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15735 to 13048. [2021-10-07 15:15:47,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13048 states, 13042 states have (on average 3.585646373255636) internal successors, (46764), 13047 states have internal predecessors, (46764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13048 states to 13048 states and 46764 transitions. [2021-10-07 15:15:47,193 INFO L78 Accepts]: Start accepts. Automaton has 13048 states and 46764 transitions. Word has length 26 [2021-10-07 15:15:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:47,193 INFO L470 AbstractCegarLoop]: Abstraction has 13048 states and 46764 transitions. [2021-10-07 15:15:47,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 13048 states and 46764 transitions. [2021-10-07 15:15:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:15:47,201 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:47,201 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:47,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-10-07 15:15:47,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:47,416 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:15:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2129726882, now seen corresponding path program 18 times [2021-10-07 15:15:47,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:47,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911838993] [2021-10-07 15:15:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:47,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:15:47,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:47,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911838993] [2021-10-07 15:15:47,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911838993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:47,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274159928] [2021-10-07 15:15:47,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:15:47,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:47,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:47,611 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:15:47,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-07 15:15:50,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-07 15:15:50,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:15:50,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-07 15:15:50,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:15:50,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:15:50,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:15:50,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:15:50,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:15:50,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274159928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:50,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:15:50,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 21 [2021-10-07 15:15:50,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249612940] [2021-10-07 15:15:50,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-07 15:15:50,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:15:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-07 15:15:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:15:50,739 INFO L87 Difference]: Start difference. First operand 13048 states and 46764 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:15:56,394 INFO L93 Difference]: Finished difference Result 20284 states and 66885 transitions. [2021-10-07 15:15:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-07 15:15:56,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:15:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:15:56,447 INFO L225 Difference]: With dead ends: 20284 [2021-10-07 15:15:56,447 INFO L226 Difference]: Without dead ends: 19478 [2021-10-07 15:15:56,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 3875.9ms TimeCoverageRelationStatistics Valid=834, Invalid=4716, Unknown=0, NotChecked=0, Total=5550 [2021-10-07 15:15:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19478 states. [2021-10-07 15:15:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19478 to 13910. [2021-10-07 15:15:56,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13910 states, 13904 states have (on average 3.5463895281933255) internal successors, (49309), 13909 states have internal predecessors, (49309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:56,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13910 states to 13910 states and 49309 transitions. [2021-10-07 15:15:56,895 INFO L78 Accepts]: Start accepts. Automaton has 13910 states and 49309 transitions. Word has length 26 [2021-10-07 15:15:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:15:56,895 INFO L470 AbstractCegarLoop]: Abstraction has 13910 states and 49309 transitions. [2021-10-07 15:15:56,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:15:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 13910 states and 49309 transitions. [2021-10-07 15:15:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:15:56,901 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:15:56,901 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:15:56,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-10-07 15:15:57,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:57,102 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:15:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:15:57,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2063312414, now seen corresponding path program 19 times [2021-10-07 15:15:57,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:15:57,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195540672] [2021-10-07 15:15:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:15:57,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:15:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:15:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:15:57,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:15:57,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195540672] [2021-10-07 15:15:57,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195540672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:15:57,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735158306] [2021-10-07 15:15:57,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:15:57,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:15:57,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:15:57,851 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:15:57,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-07 15:16:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:00,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-07 15:16:00,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:16:00,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735158306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:00,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:00,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2021-10-07 15:16:00,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994518572] [2021-10-07 15:16:00,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:16:00,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:16:00,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:16:00,849 INFO L87 Difference]: Start difference. First operand 13910 states and 49309 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:03,807 INFO L93 Difference]: Finished difference Result 17905 states and 60655 transitions. [2021-10-07 15:16:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:16:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:16:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:03,857 INFO L225 Difference]: With dead ends: 17905 [2021-10-07 15:16:03,857 INFO L226 Difference]: Without dead ends: 17825 [2021-10-07 15:16:03,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2293.7ms TimeCoverageRelationStatistics Valid=278, Invalid=2374, Unknown=0, NotChecked=0, Total=2652 [2021-10-07 15:16:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17825 states. [2021-10-07 15:16:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17825 to 14002. [2021-10-07 15:16:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14002 states, 13996 states have (on average 3.545655901686196) internal successors, (49625), 14001 states have internal predecessors, (49625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14002 states to 14002 states and 49625 transitions. [2021-10-07 15:16:04,396 INFO L78 Accepts]: Start accepts. Automaton has 14002 states and 49625 transitions. Word has length 26 [2021-10-07 15:16:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:04,400 INFO L470 AbstractCegarLoop]: Abstraction has 14002 states and 49625 transitions. [2021-10-07 15:16:04,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 14002 states and 49625 transitions. [2021-10-07 15:16:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:16:04,407 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:04,408 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:04,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-10-07 15:16:04,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:04,617 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:16:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1759172411, now seen corresponding path program 16 times [2021-10-07 15:16:04,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:04,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387672195] [2021-10-07 15:16:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:04,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:05,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:05,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387672195] [2021-10-07 15:16:05,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387672195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:05,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017285505] [2021-10-07 15:16:05,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:16:05,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:05,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:05,553 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:16:05,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-10-07 15:16:08,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:16:08,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:08,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-07 15:16:08,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:16:08,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017285505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:08,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:08,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 23 [2021-10-07 15:16:08,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645884077] [2021-10-07 15:16:08,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:16:08,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:08,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:16:08,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:16:08,716 INFO L87 Difference]: Start difference. First operand 14002 states and 49625 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:11,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:11,973 INFO L93 Difference]: Finished difference Result 18939 states and 63182 transitions. [2021-10-07 15:16:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-07 15:16:11,973 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:16:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:12,037 INFO L225 Difference]: With dead ends: 18939 [2021-10-07 15:16:12,037 INFO L226 Difference]: Without dead ends: 18341 [2021-10-07 15:16:12,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2091.9ms TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2021-10-07 15:16:12,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18341 states. [2021-10-07 15:16:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18341 to 14338. [2021-10-07 15:16:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14338 states, 14332 states have (on average 3.5389338543120292) internal successors, (50720), 14337 states have internal predecessors, (50720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14338 states to 14338 states and 50720 transitions. [2021-10-07 15:16:12,485 INFO L78 Accepts]: Start accepts. Automaton has 14338 states and 50720 transitions. Word has length 26 [2021-10-07 15:16:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:12,485 INFO L470 AbstractCegarLoop]: Abstraction has 14338 states and 50720 transitions. [2021-10-07 15:16:12,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 14338 states and 50720 transitions. [2021-10-07 15:16:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:16:12,492 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:12,492 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:12,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-10-07 15:16:12,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:12,693 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:16:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:12,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1755208750, now seen corresponding path program 20 times [2021-10-07 15:16:12,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:12,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705353753] [2021-10-07 15:16:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:12,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:13,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:13,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705353753] [2021-10-07 15:16:13,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705353753] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:13,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370859571] [2021-10-07 15:16:13,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:16:13,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:13,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:13,621 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:16:13,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-10-07 15:16:16,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:16:16,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:16,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-07 15:16:16,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:16,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-07 15:16:16,559 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-10-07 15:16:16,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-07 15:16:16,651 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:16:16,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-07 15:16:18,773 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:16:18,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-10-07 15:16:18,998 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:16:18,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-10-07 15:16:20,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:20,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370859571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:20,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:20,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 27 [2021-10-07 15:16:20,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251309130] [2021-10-07 15:16:20,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-07 15:16:20,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:20,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-07 15:16:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=752, Unknown=1, NotChecked=0, Total=812 [2021-10-07 15:16:20,181 INFO L87 Difference]: Start difference. First operand 14338 states and 50720 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:30,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:30,353 INFO L93 Difference]: Finished difference Result 14912 states and 51477 transitions. [2021-10-07 15:16:30,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-07 15:16:30,353 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:16:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:30,392 INFO L225 Difference]: With dead ends: 14912 [2021-10-07 15:16:30,392 INFO L226 Difference]: Without dead ends: 14862 [2021-10-07 15:16:30,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 9402.3ms TimeCoverageRelationStatistics Valid=184, Invalid=2167, Unknown=1, NotChecked=0, Total=2352 [2021-10-07 15:16:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14862 states. [2021-10-07 15:16:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14862 to 13892. [2021-10-07 15:16:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13892 states, 13886 states have (on average 3.503960823851361) internal successors, (48656), 13891 states have internal predecessors, (48656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13892 states to 13892 states and 48656 transitions. [2021-10-07 15:16:30,731 INFO L78 Accepts]: Start accepts. Automaton has 13892 states and 48656 transitions. Word has length 26 [2021-10-07 15:16:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:30,731 INFO L470 AbstractCegarLoop]: Abstraction has 13892 states and 48656 transitions. [2021-10-07 15:16:30,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 13892 states and 48656 transitions. [2021-10-07 15:16:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:16:30,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:30,813 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:30,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-10-07 15:16:31,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:31,014 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:16:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:31,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1670466873, now seen corresponding path program 17 times [2021-10-07 15:16:31,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:31,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247783285] [2021-10-07 15:16:31,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:31,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:16:31,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:31,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247783285] [2021-10-07 15:16:31,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247783285] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:31,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461130645] [2021-10-07 15:16:31,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:16:31,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:31,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:31,138 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:16:31,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-10-07 15:16:33,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-07 15:16:33,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:33,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-07 15:16:33,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-07 15:16:34,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461130645] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:34,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:34,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2021-10-07 15:16:34,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94903088] [2021-10-07 15:16:34,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-07 15:16:34,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:34,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-07 15:16:34,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-07 15:16:34,184 INFO L87 Difference]: Start difference. First operand 13892 states and 48656 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:35,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:35,241 INFO L93 Difference]: Finished difference Result 18366 states and 61874 transitions. [2021-10-07 15:16:35,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-07 15:16:35,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:16:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:35,306 INFO L225 Difference]: With dead ends: 18366 [2021-10-07 15:16:35,307 INFO L226 Difference]: Without dead ends: 18226 [2021-10-07 15:16:35,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-10-07 15:16:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18226 states. [2021-10-07 15:16:35,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18226 to 13264. [2021-10-07 15:16:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13264 states, 13258 states have (on average 3.471715190828179) internal successors, (46028), 13263 states have internal predecessors, (46028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13264 states to 13264 states and 46028 transitions. [2021-10-07 15:16:35,784 INFO L78 Accepts]: Start accepts. Automaton has 13264 states and 46028 transitions. Word has length 26 [2021-10-07 15:16:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:35,785 INFO L470 AbstractCegarLoop]: Abstraction has 13264 states and 46028 transitions. [2021-10-07 15:16:35,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:35,785 INFO L276 IsEmpty]: Start isEmpty. Operand 13264 states and 46028 transitions. [2021-10-07 15:16:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:16:35,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:35,790 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:35,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-10-07 15:16:35,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-10-07 15:16:35,991 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:16:35,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:35,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1674430533, now seen corresponding path program 18 times [2021-10-07 15:16:35,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:35,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324303825] [2021-10-07 15:16:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:35,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:36,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:36,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324303825] [2021-10-07 15:16:36,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324303825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:36,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414297169] [2021-10-07 15:16:36,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:16:36,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:36,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:36,792 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:16:36,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-10-07 15:16:39,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-07 15:16:39,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:39,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-07 15:16:39,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:39,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:16:39,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:16:39,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:16:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:40,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414297169] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:40,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:40,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 15:16:40,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59945552] [2021-10-07 15:16:40,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:16:40,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:16:40,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:16:40,411 INFO L87 Difference]: Start difference. First operand 13264 states and 46028 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:45,485 INFO L93 Difference]: Finished difference Result 16147 states and 52994 transitions. [2021-10-07 15:16:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-07 15:16:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:16:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:45,528 INFO L225 Difference]: With dead ends: 16147 [2021-10-07 15:16:45,528 INFO L226 Difference]: Without dead ends: 15999 [2021-10-07 15:16:45,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 4014.0ms TimeCoverageRelationStatistics Valid=466, Invalid=4504, Unknown=0, NotChecked=0, Total=4970 [2021-10-07 15:16:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15999 states. [2021-10-07 15:16:45,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15999 to 12910. [2021-10-07 15:16:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12910 states, 12904 states have (on average 3.45962492250465) internal successors, (44643), 12909 states have internal predecessors, (44643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12910 states to 12910 states and 44643 transitions. [2021-10-07 15:16:45,869 INFO L78 Accepts]: Start accepts. Automaton has 12910 states and 44643 transitions. Word has length 26 [2021-10-07 15:16:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:45,943 INFO L470 AbstractCegarLoop]: Abstraction has 12910 states and 44643 transitions. [2021-10-07 15:16:45,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 12910 states and 44643 transitions. [2021-10-07 15:16:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:16:45,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:45,950 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:45,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-10-07 15:16:46,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-10-07 15:16:46,158 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:16:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1188540497, now seen corresponding path program 19 times [2021-10-07 15:16:46,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:46,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227167794] [2021-10-07 15:16:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:46,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:46,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:46,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227167794] [2021-10-07 15:16:46,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227167794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:46,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107266871] [2021-10-07 15:16:46,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:16:46,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:46,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:46,965 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:16:46,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-07 15:16:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-07 15:16:49,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:49,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:16:49,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:16:49,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:16:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:50,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107266871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:50,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:50,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 15:16:50,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641669683] [2021-10-07 15:16:50,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:16:50,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:16:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:16:50,671 INFO L87 Difference]: Start difference. First operand 12910 states and 44643 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:16:53,995 INFO L93 Difference]: Finished difference Result 17175 states and 56442 transitions. [2021-10-07 15:16:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 15:16:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:16:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:16:54,036 INFO L225 Difference]: With dead ends: 17175 [2021-10-07 15:16:54,037 INFO L226 Difference]: Without dead ends: 17005 [2021-10-07 15:16:54,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2296.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1908, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:16:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17005 states. [2021-10-07 15:16:54,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17005 to 13486. [2021-10-07 15:16:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13486 states, 13480 states have (on average 3.4613501483679525) internal successors, (46659), 13485 states have internal predecessors, (46659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13486 states to 13486 states and 46659 transitions. [2021-10-07 15:16:54,421 INFO L78 Accepts]: Start accepts. Automaton has 13486 states and 46659 transitions. Word has length 26 [2021-10-07 15:16:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:16:54,421 INFO L470 AbstractCegarLoop]: Abstraction has 13486 states and 46659 transitions. [2021-10-07 15:16:54,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:16:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 13486 states and 46659 transitions. [2021-10-07 15:16:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:16:54,426 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:16:54,426 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:16:54,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-10-07 15:16:54,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:54,628 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:16:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:16:54,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1188540498, now seen corresponding path program 21 times [2021-10-07 15:16:54,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:16:54,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957006124] [2021-10-07 15:16:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:16:54,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:16:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:16:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:16:55,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:16:55,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957006124] [2021-10-07 15:16:55,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957006124] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:55,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344682667] [2021-10-07 15:16:55,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:16:55,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:16:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:16:55,566 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:16:55,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-10-07 15:16:58,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:16:58,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:16:58,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-07 15:16:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:16:58,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:16:58,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:16:58,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:16:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:16:59,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344682667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:16:59,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:16:59,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-07 15:16:59,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865402534] [2021-10-07 15:16:59,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:16:59,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:16:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:16:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:16:59,573 INFO L87 Difference]: Start difference. First operand 13486 states and 46659 transitions. Second operand has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:08,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:08,752 INFO L93 Difference]: Finished difference Result 17490 states and 57142 transitions. [2021-10-07 15:17:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-07 15:17:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:17:08,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:08,794 INFO L225 Difference]: With dead ends: 17490 [2021-10-07 15:17:08,794 INFO L226 Difference]: Without dead ends: 17290 [2021-10-07 15:17:08,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 7901.3ms TimeCoverageRelationStatistics Valid=981, Invalid=5825, Unknown=0, NotChecked=0, Total=6806 [2021-10-07 15:17:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17290 states. [2021-10-07 15:17:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17290 to 13486. [2021-10-07 15:17:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13486 states, 13480 states have (on average 3.460979228486647) internal successors, (46654), 13485 states have internal predecessors, (46654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13486 states to 13486 states and 46654 transitions. [2021-10-07 15:17:09,163 INFO L78 Accepts]: Start accepts. Automaton has 13486 states and 46654 transitions. Word has length 26 [2021-10-07 15:17:09,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:09,163 INFO L470 AbstractCegarLoop]: Abstraction has 13486 states and 46654 transitions. [2021-10-07 15:17:09,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 13486 states and 46654 transitions. [2021-10-07 15:17:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:17:09,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:09,169 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:09,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:09,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-10-07 15:17:09,370 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:17:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1895316131, now seen corresponding path program 20 times [2021-10-07 15:17:09,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:09,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339422515] [2021-10-07 15:17:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:09,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:17:09,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:09,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339422515] [2021-10-07 15:17:09,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339422515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:09,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171564826] [2021-10-07 15:17:09,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:17:09,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:09,524 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:09,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-10-07 15:17:12,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:17:12,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:12,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-07 15:17:12,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:17:12,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171564826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:12,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:12,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-10-07 15:17:12,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455226434] [2021-10-07 15:17:12,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-07 15:17:12,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:12,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-07 15:17:12,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-10-07 15:17:12,707 INFO L87 Difference]: Start difference. First operand 13486 states and 46654 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:14,277 INFO L93 Difference]: Finished difference Result 23475 states and 78433 transitions. [2021-10-07 15:17:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:17:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:17:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:14,347 INFO L225 Difference]: With dead ends: 23475 [2021-10-07 15:17:14,348 INFO L226 Difference]: Without dead ends: 23345 [2021-10-07 15:17:14,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 424.7ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:17:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23345 states. [2021-10-07 15:17:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23345 to 15176. [2021-10-07 15:17:14,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15176 states, 15170 states have (on average 3.478246539222149) internal successors, (52765), 15175 states have internal predecessors, (52765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:14,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15176 states to 15176 states and 52765 transitions. [2021-10-07 15:17:14,850 INFO L78 Accepts]: Start accepts. Automaton has 15176 states and 52765 transitions. Word has length 26 [2021-10-07 15:17:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:14,851 INFO L470 AbstractCegarLoop]: Abstraction has 15176 states and 52765 transitions. [2021-10-07 15:17:14,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:14,851 INFO L276 IsEmpty]: Start isEmpty. Operand 15176 states and 52765 transitions. [2021-10-07 15:17:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:17:14,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:14,857 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:14,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:15,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,94 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:15,058 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:17:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:15,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1895316130, now seen corresponding path program 22 times [2021-10-07 15:17:15,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:15,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162988973] [2021-10-07 15:17:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:15,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:17:15,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:15,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162988973] [2021-10-07 15:17:15,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162988973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:15,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454829629] [2021-10-07 15:17:15,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:17:15,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:15,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:15,231 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:15,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-10-07 15:17:18,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:17:18,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:18,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-07 15:17:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:17:18,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454829629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:18,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:18,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-07 15:17:18,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571619888] [2021-10-07 15:17:18,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-07 15:17:18,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:18,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-07 15:17:18,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-10-07 15:17:18,630 INFO L87 Difference]: Start difference. First operand 15176 states and 52765 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:19,799 INFO L93 Difference]: Finished difference Result 20283 states and 69302 transitions. [2021-10-07 15:17:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:17:19,800 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:17:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:19,854 INFO L225 Difference]: With dead ends: 20283 [2021-10-07 15:17:19,854 INFO L226 Difference]: Without dead ends: 20283 [2021-10-07 15:17:19,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 386.7ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:17:19,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2021-10-07 15:17:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 16608. [2021-10-07 15:17:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16608 states, 16602 states have (on average 3.512950246958198) internal successors, (58322), 16607 states have internal predecessors, (58322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16608 states to 16608 states and 58322 transitions. [2021-10-07 15:17:20,317 INFO L78 Accepts]: Start accepts. Automaton has 16608 states and 58322 transitions. Word has length 26 [2021-10-07 15:17:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:20,317 INFO L470 AbstractCegarLoop]: Abstraction has 16608 states and 58322 transitions. [2021-10-07 15:17:20,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 16608 states and 58322 transitions. [2021-10-07 15:17:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:17:20,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:20,323 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:20,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:20,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-10-07 15:17:20,532 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:17:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:20,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1259687662, now seen corresponding path program 23 times [2021-10-07 15:17:20,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:20,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575666854] [2021-10-07 15:17:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:20,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:21,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:21,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575666854] [2021-10-07 15:17:21,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575666854] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:21,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768829686] [2021-10-07 15:17:21,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:17:21,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:21,247 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:21,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-10-07 15:17:24,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-07 15:17:24,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-07 15:17:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:17:24,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768829686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:24,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:24,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2021-10-07 15:17:24,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300256753] [2021-10-07 15:17:24,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:17:24,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:17:24,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:17:24,622 INFO L87 Difference]: Start difference. First operand 16608 states and 58322 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:28,180 INFO L93 Difference]: Finished difference Result 22447 states and 74735 transitions. [2021-10-07 15:17:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-07 15:17:28,181 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:17:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:28,244 INFO L225 Difference]: With dead ends: 22447 [2021-10-07 15:17:28,244 INFO L226 Difference]: Without dead ends: 22227 [2021-10-07 15:17:28,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2074.9ms TimeCoverageRelationStatistics Valid=215, Invalid=2335, Unknown=0, NotChecked=0, Total=2550 [2021-10-07 15:17:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22227 states. [2021-10-07 15:17:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22227 to 16770. [2021-10-07 15:17:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16770 states, 16764 states have (on average 3.5067406346933905) internal successors, (58787), 16769 states have internal predecessors, (58787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16770 states to 16770 states and 58787 transitions. [2021-10-07 15:17:28,752 INFO L78 Accepts]: Start accepts. Automaton has 16770 states and 58787 transitions. Word has length 26 [2021-10-07 15:17:28,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:28,752 INFO L470 AbstractCegarLoop]: Abstraction has 16770 states and 58787 transitions. [2021-10-07 15:17:28,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 16770 states and 58787 transitions. [2021-10-07 15:17:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:17:28,759 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:28,759 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:28,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:28,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,96 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:28,959 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:17:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:28,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1745577698, now seen corresponding path program 24 times [2021-10-07 15:17:28,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:28,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639346576] [2021-10-07 15:17:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:28,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:29,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:29,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639346576] [2021-10-07 15:17:29,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639346576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:29,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379134704] [2021-10-07 15:17:29,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:17:29,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:29,910 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:29,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-10-07 15:17:32,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-07 15:17:32,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:17:32,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-07 15:17:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:32,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:17:32,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:17:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:17:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:33,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379134704] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:33,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:33,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-10-07 15:17:33,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099768705] [2021-10-07 15:17:33,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:17:33,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:17:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:17:33,633 INFO L87 Difference]: Start difference. First operand 16770 states and 58787 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:45,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:17:45,993 INFO L93 Difference]: Finished difference Result 22815 states and 74468 transitions. [2021-10-07 15:17:45,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-07 15:17:45,994 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:17:45,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:17:46,055 INFO L225 Difference]: With dead ends: 22815 [2021-10-07 15:17:46,055 INFO L226 Difference]: Without dead ends: 22425 [2021-10-07 15:17:46,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 9402.8ms TimeCoverageRelationStatistics Valid=1337, Invalid=9583, Unknown=0, NotChecked=0, Total=10920 [2021-10-07 15:17:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22425 states. [2021-10-07 15:17:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22425 to 16894. [2021-10-07 15:17:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16894 states, 16888 states have (on average 3.502309332070109) internal successors, (59147), 16893 states have internal predecessors, (59147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16894 states to 16894 states and 59147 transitions. [2021-10-07 15:17:46,597 INFO L78 Accepts]: Start accepts. Automaton has 16894 states and 59147 transitions. Word has length 26 [2021-10-07 15:17:46,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:17:46,597 INFO L470 AbstractCegarLoop]: Abstraction has 16894 states and 59147 transitions. [2021-10-07 15:17:46,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:17:46,598 INFO L276 IsEmpty]: Start isEmpty. Operand 16894 states and 59147 transitions. [2021-10-07 15:17:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-07 15:17:46,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:17:46,604 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:17:46,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-10-07 15:17:46,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-10-07 15:17:46,810 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:17:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:17:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash -918101550, now seen corresponding path program 25 times [2021-10-07 15:17:46,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:17:46,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449443320] [2021-10-07 15:17:46,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:17:46,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:17:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:48,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:17:48,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449443320] [2021-10-07 15:17:48,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449443320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:48,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549602048] [2021-10-07 15:17:48,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:17:48,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:17:48,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:17:48,177 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:17:48,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-10-07 15:17:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:17:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-07 15:17:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:17:51,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:17:51,512 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:17:51,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:17:51,649 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:17:51,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:17:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:17:52,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549602048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:17:52,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:17:52,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 29 [2021-10-07 15:17:52,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902533653] [2021-10-07 15:17:52,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:17:52,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:17:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:17:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:17:52,967 INFO L87 Difference]: Start difference. First operand 16894 states and 59147 transitions. Second operand has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:03,043 INFO L93 Difference]: Finished difference Result 26317 states and 85807 transitions. [2021-10-07 15:18:03,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-07 15:18:03,043 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-07 15:18:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:03,127 INFO L225 Difference]: With dead ends: 26317 [2021-10-07 15:18:03,127 INFO L226 Difference]: Without dead ends: 26277 [2021-10-07 15:18:03,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 8546.7ms TimeCoverageRelationStatistics Valid=920, Invalid=6052, Unknown=0, NotChecked=0, Total=6972 [2021-10-07 15:18:03,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26277 states. [2021-10-07 15:18:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26277 to 16934. [2021-10-07 15:18:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16934 states, 16928 states have (on average 3.5017131379962194) internal successors, (59277), 16933 states have internal predecessors, (59277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16934 states to 16934 states and 59277 transitions. [2021-10-07 15:18:03,690 INFO L78 Accepts]: Start accepts. Automaton has 16934 states and 59277 transitions. Word has length 26 [2021-10-07 15:18:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:03,690 INFO L470 AbstractCegarLoop]: Abstraction has 16934 states and 59277 transitions. [2021-10-07 15:18:03,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 16934 states and 59277 transitions. [2021-10-07 15:18:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:18:03,696 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:03,696 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:03,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:03,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:03,897 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:18:03,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2065171049, now seen corresponding path program 26 times [2021-10-07 15:18:03,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:03,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675545456] [2021-10-07 15:18:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:03,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-07 15:18:04,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:04,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675545456] [2021-10-07 15:18:04,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675545456] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:04,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644145255] [2021-10-07 15:18:04,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:18:04,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:04,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:04,171 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:04,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-10-07 15:18:06,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:18:06,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:06,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-07 15:18:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:18:07,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644145255] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:07,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:07,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 20 [2021-10-07 15:18:07,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206814765] [2021-10-07 15:18:07,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 15:18:07,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:07,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 15:18:07,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:18:07,597 INFO L87 Difference]: Start difference. First operand 16934 states and 59277 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:08,776 INFO L93 Difference]: Finished difference Result 23394 states and 79413 transitions. [2021-10-07 15:18:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:18:08,777 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:18:08,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:08,853 INFO L225 Difference]: With dead ends: 23394 [2021-10-07 15:18:08,853 INFO L226 Difference]: Without dead ends: 23174 [2021-10-07 15:18:08,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:18:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23174 states. [2021-10-07 15:18:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23174 to 18988. [2021-10-07 15:18:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18988 states, 18982 states have (on average 3.5070593193551787) internal successors, (66571), 18987 states have internal predecessors, (66571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18988 states to 18988 states and 66571 transitions. [2021-10-07 15:18:09,449 INFO L78 Accepts]: Start accepts. Automaton has 18988 states and 66571 transitions. Word has length 27 [2021-10-07 15:18:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:09,449 INFO L470 AbstractCegarLoop]: Abstraction has 18988 states and 66571 transitions. [2021-10-07 15:18:09,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 18988 states and 66571 transitions. [2021-10-07 15:18:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:18:09,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:09,459 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:09,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:09,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-10-07 15:18:09,671 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:18:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1747869871, now seen corresponding path program 27 times [2021-10-07 15:18:09,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:09,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515201154] [2021-10-07 15:18:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:09,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:10,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:10,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515201154] [2021-10-07 15:18:10,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515201154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:10,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762963786] [2021-10-07 15:18:10,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:18:10,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:10,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:10,492 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:10,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-10-07 15:18:13,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-07 15:18:13,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:13,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-07 15:18:13,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 15:18:14,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762963786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:14,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:14,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 26 [2021-10-07 15:18:14,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330787905] [2021-10-07 15:18:14,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-07 15:18:14,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-07 15:18:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-10-07 15:18:14,345 INFO L87 Difference]: Start difference. First operand 18988 states and 66571 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:16,494 INFO L93 Difference]: Finished difference Result 23918 states and 81367 transitions. [2021-10-07 15:18:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-07 15:18:16,495 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:18:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:16,563 INFO L225 Difference]: With dead ends: 23918 [2021-10-07 15:18:16,563 INFO L226 Difference]: Without dead ends: 23798 [2021-10-07 15:18:16,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1387.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2021-10-07 15:18:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23798 states. [2021-10-07 15:18:17,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23798 to 18766. [2021-10-07 15:18:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18766 states, 18760 states have (on average 3.5156183368869938) internal successors, (65953), 18765 states have internal predecessors, (65953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18766 states to 18766 states and 65953 transitions. [2021-10-07 15:18:17,114 INFO L78 Accepts]: Start accepts. Automaton has 18766 states and 65953 transitions. Word has length 27 [2021-10-07 15:18:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:17,114 INFO L470 AbstractCegarLoop]: Abstraction has 18766 states and 65953 transitions. [2021-10-07 15:18:17,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 18766 states and 65953 transitions. [2021-10-07 15:18:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:18:17,122 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:17,122 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:17,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:17,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:17,330 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:18:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:17,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1364468235, now seen corresponding path program 28 times [2021-10-07 15:18:17,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:17,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20973120] [2021-10-07 15:18:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:17,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-07 15:18:17,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:17,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20973120] [2021-10-07 15:18:17,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20973120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:17,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264088420] [2021-10-07 15:18:17,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:18:17,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:17,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:17,509 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:17,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-10-07 15:18:20,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:18:20,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:20,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-07 15:18:20,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:18:20,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264088420] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:20,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:20,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 14 [2021-10-07 15:18:20,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332757223] [2021-10-07 15:18:20,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-07 15:18:20,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-07 15:18:20,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-10-07 15:18:20,932 INFO L87 Difference]: Start difference. First operand 18766 states and 65953 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:21,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:21,615 INFO L93 Difference]: Finished difference Result 21825 states and 74648 transitions. [2021-10-07 15:18:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:18:21,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:18:21,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:21,673 INFO L225 Difference]: With dead ends: 21825 [2021-10-07 15:18:21,673 INFO L226 Difference]: Without dead ends: 21695 [2021-10-07 15:18:21,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:18:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21695 states. [2021-10-07 15:18:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21695 to 17036. [2021-10-07 15:18:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17036 states, 17030 states have (on average 3.503581914268937) internal successors, (59666), 17035 states have internal predecessors, (59666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17036 states to 17036 states and 59666 transitions. [2021-10-07 15:18:22,220 INFO L78 Accepts]: Start accepts. Automaton has 17036 states and 59666 transitions. Word has length 27 [2021-10-07 15:18:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:22,220 INFO L470 AbstractCegarLoop]: Abstraction has 17036 states and 59666 transitions. [2021-10-07 15:18:22,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 17036 states and 59666 transitions. [2021-10-07 15:18:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:18:22,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:22,227 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:22,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:22,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-10-07 15:18:22,428 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:18:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:22,429 INFO L82 PathProgramCache]: Analyzing trace with hash 882541859, now seen corresponding path program 29 times [2021-10-07 15:18:22,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:22,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202445910] [2021-10-07 15:18:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:22,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-07 15:18:22,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:22,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202445910] [2021-10-07 15:18:22,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202445910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:22,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522904912] [2021-10-07 15:18:22,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:18:22,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:22,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:22,593 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:22,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-10-07 15:18:25,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-07 15:18:25,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:25,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-07 15:18:25,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:18:26,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522904912] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:26,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:26,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 20 [2021-10-07 15:18:26,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868407227] [2021-10-07 15:18:26,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-07 15:18:26,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:26,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-07 15:18:26,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-07 15:18:26,579 INFO L87 Difference]: Start difference. First operand 17036 states and 59666 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:27,778 INFO L93 Difference]: Finished difference Result 23686 states and 80205 transitions. [2021-10-07 15:18:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-07 15:18:27,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:18:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:27,855 INFO L225 Difference]: With dead ends: 23686 [2021-10-07 15:18:27,855 INFO L226 Difference]: Without dead ends: 23566 [2021-10-07 15:18:27,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 551.5ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:18:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23566 states. [2021-10-07 15:18:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23566 to 16548. [2021-10-07 15:18:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16548 states, 16542 states have (on average 3.4969169387014873) internal successors, (57846), 16547 states have internal predecessors, (57846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16548 states to 16548 states and 57846 transitions. [2021-10-07 15:18:28,430 INFO L78 Accepts]: Start accepts. Automaton has 16548 states and 57846 transitions. Word has length 27 [2021-10-07 15:18:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:28,430 INFO L470 AbstractCegarLoop]: Abstraction has 16548 states and 57846 transitions. [2021-10-07 15:18:28,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 16548 states and 57846 transitions. [2021-10-07 15:18:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:18:28,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:28,438 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:28,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-10-07 15:18:28,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:28,639 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:18:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:28,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1628751375, now seen corresponding path program 14 times [2021-10-07 15:18:28,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:28,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104355144] [2021-10-07 15:18:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:28,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:29,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:29,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104355144] [2021-10-07 15:18:29,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104355144] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:29,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79023566] [2021-10-07 15:18:29,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:18:29,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:29,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:29,876 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:29,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-10-07 15:18:32,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:18:32,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-07 15:18:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:33,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:18:33,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:18:33,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:18:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:18:34,403 INFO L354 Elim1Store]: treesize reduction 148, result has 19.6 percent of original size [2021-10-07 15:18:34,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 72 [2021-10-07 15:18:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:34,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79023566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:34,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:34,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 32 [2021-10-07 15:18:34,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559866968] [2021-10-07 15:18:34,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-07 15:18:34,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:34,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-07 15:18:34,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-10-07 15:18:34,975 INFO L87 Difference]: Start difference. First operand 16548 states and 57846 transitions. Second operand has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:39,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:39,229 INFO L93 Difference]: Finished difference Result 19977 states and 66491 transitions. [2021-10-07 15:18:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-07 15:18:39,230 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:18:39,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:39,281 INFO L225 Difference]: With dead ends: 19977 [2021-10-07 15:18:39,281 INFO L226 Difference]: Without dead ends: 19893 [2021-10-07 15:18:39,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 4151.3ms TimeCoverageRelationStatistics Valid=460, Invalid=3080, Unknown=0, NotChecked=0, Total=3540 [2021-10-07 15:18:39,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19893 states. [2021-10-07 15:18:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19893 to 16530. [2021-10-07 15:18:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16530 states, 16524 states have (on average 3.497337206487533) internal successors, (57790), 16529 states have internal predecessors, (57790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16530 states to 16530 states and 57790 transitions. [2021-10-07 15:18:39,754 INFO L78 Accepts]: Start accepts. Automaton has 16530 states and 57790 transitions. Word has length 27 [2021-10-07 15:18:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:39,754 INFO L470 AbstractCegarLoop]: Abstraction has 16530 states and 57790 transitions. [2021-10-07 15:18:39,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 16530 states and 57790 transitions. [2021-10-07 15:18:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:18:39,760 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:39,761 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:39,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:39,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:39,961 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:18:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:39,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1632715035, now seen corresponding path program 15 times [2021-10-07 15:18:39,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:39,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160533067] [2021-10-07 15:18:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:39,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-07 15:18:40,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:40,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160533067] [2021-10-07 15:18:40,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160533067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:40,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156510281] [2021-10-07 15:18:40,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:18:40,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:40,234 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:40,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-10-07 15:18:43,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-07 15:18:43,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:43,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-07 15:18:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:43,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-07 15:18:43,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:18:44,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:18:44,506 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:18:44,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-10-07 15:18:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-07 15:18:44,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156510281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:44,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:44,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 22 [2021-10-07 15:18:44,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645103595] [2021-10-07 15:18:44,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:18:44,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:44,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:18:44,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:18:44,807 INFO L87 Difference]: Start difference. First operand 16530 states and 57790 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:47,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:47,910 INFO L93 Difference]: Finished difference Result 19443 states and 65250 transitions. [2021-10-07 15:18:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-07 15:18:47,911 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:18:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:47,960 INFO L225 Difference]: With dead ends: 19443 [2021-10-07 15:18:47,960 INFO L226 Difference]: Without dead ends: 19099 [2021-10-07 15:18:47,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2227.8ms TimeCoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2021-10-07 15:18:47,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19099 states. [2021-10-07 15:18:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19099 to 16074. [2021-10-07 15:18:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16074 states, 16068 states have (on average 3.4674508339556884) internal successors, (55715), 16073 states have internal predecessors, (55715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16074 states to 16074 states and 55715 transitions. [2021-10-07 15:18:48,462 INFO L78 Accepts]: Start accepts. Automaton has 16074 states and 55715 transitions. Word has length 27 [2021-10-07 15:18:48,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:48,462 INFO L470 AbstractCegarLoop]: Abstraction has 16074 states and 55715 transitions. [2021-10-07 15:18:48,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 16074 states and 55715 transitions. [2021-10-07 15:18:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:18:48,468 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:48,469 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:48,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:48,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:48,669 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:18:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:48,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1500336975, now seen corresponding path program 16 times [2021-10-07 15:18:48,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:48,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647225075] [2021-10-07 15:18:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:48,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:50,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:50,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647225075] [2021-10-07 15:18:50,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647225075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:50,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66951443] [2021-10-07 15:18:50,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:18:50,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:50,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:50,225 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:50,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-10-07 15:18:53,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:18:53,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:18:53,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-07 15:18:53,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:18:53,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2021-10-07 15:18:53,961 INFO L354 Elim1Store]: treesize reduction 92, result has 20.7 percent of original size [2021-10-07 15:18:53,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 48 [2021-10-07 15:18:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-07 15:18:54,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66951443] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:54,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:18:54,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 23 [2021-10-07 15:18:54,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842064653] [2021-10-07 15:18:54,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:18:54,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:18:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:18:54,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:18:54,028 INFO L87 Difference]: Start difference. First operand 16074 states and 55715 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:18:56,381 INFO L93 Difference]: Finished difference Result 17032 states and 58492 transitions. [2021-10-07 15:18:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-07 15:18:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:18:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:18:56,425 INFO L225 Difference]: With dead ends: 17032 [2021-10-07 15:18:56,425 INFO L226 Difference]: Without dead ends: 16896 [2021-10-07 15:18:56,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2276.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-10-07 15:18:56,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16896 states. [2021-10-07 15:18:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16896 to 15994. [2021-10-07 15:18:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15994 states, 15988 states have (on average 3.4689141856392296) internal successors, (55461), 15993 states have internal predecessors, (55461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15994 states to 15994 states and 55461 transitions. [2021-10-07 15:18:56,870 INFO L78 Accepts]: Start accepts. Automaton has 15994 states and 55461 transitions. Word has length 27 [2021-10-07 15:18:56,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:18:56,870 INFO L470 AbstractCegarLoop]: Abstraction has 15994 states and 55461 transitions. [2021-10-07 15:18:56,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:18:56,870 INFO L276 IsEmpty]: Start isEmpty. Operand 15994 states and 55461 transitions. [2021-10-07 15:18:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:18:56,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:18:56,877 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:18:56,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-10-07 15:18:57,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-10-07 15:18:57,089 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:18:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:18:57,090 INFO L82 PathProgramCache]: Analyzing trace with hash -799263985, now seen corresponding path program 17 times [2021-10-07 15:18:57,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:18:57,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866059855] [2021-10-07 15:18:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:18:57,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:18:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:18:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:18:58,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:18:58,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866059855] [2021-10-07 15:18:58,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866059855] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:18:58,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224181563] [2021-10-07 15:18:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:18:58,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:18:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:18:58,594 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:18:58,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-10-07 15:19:01,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-07 15:19:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:01,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-07 15:19:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:01,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2021-10-07 15:19:02,333 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:19:02,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-07 15:19:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-07 15:19:02,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224181563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:02,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:02,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 28 [2021-10-07 15:19:02,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715622230] [2021-10-07 15:19:02,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-07 15:19:02,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:02,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-07 15:19:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2021-10-07 15:19:02,629 INFO L87 Difference]: Start difference. First operand 15994 states and 55461 transitions. Second operand has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:06,179 INFO L93 Difference]: Finished difference Result 17666 states and 60531 transitions. [2021-10-07 15:19:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:19:06,180 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:19:06,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:06,225 INFO L225 Difference]: With dead ends: 17666 [2021-10-07 15:19:06,225 INFO L226 Difference]: Without dead ends: 17546 [2021-10-07 15:19:06,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 3042.3ms TimeCoverageRelationStatistics Valid=227, Invalid=2529, Unknown=0, NotChecked=0, Total=2756 [2021-10-07 15:19:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17546 states. [2021-10-07 15:19:06,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17546 to 16304. [2021-10-07 15:19:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16304 states, 16298 states have (on average 3.4785863296109953) internal successors, (56694), 16303 states have internal predecessors, (56694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16304 states to 16304 states and 56694 transitions. [2021-10-07 15:19:06,725 INFO L78 Accepts]: Start accepts. Automaton has 16304 states and 56694 transitions. Word has length 27 [2021-10-07 15:19:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:06,725 INFO L470 AbstractCegarLoop]: Abstraction has 16304 states and 56694 transitions. [2021-10-07 15:19:06,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 16304 states and 56694 transitions. [2021-10-07 15:19:06,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:19:06,731 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:06,732 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:06,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:06,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-10-07 15:19:06,933 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:19:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:06,934 INFO L82 PathProgramCache]: Analyzing trace with hash 352512858, now seen corresponding path program 33 times [2021-10-07 15:19:06,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:06,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184255021] [2021-10-07 15:19:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:06,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-07 15:19:07,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:07,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184255021] [2021-10-07 15:19:07,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184255021] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:07,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450004593] [2021-10-07 15:19:07,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:19:07,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:07,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:07,100 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:07,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-10-07 15:19:10,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-07 15:19:10,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:10,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-07 15:19:10,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:11,272 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:19:11,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-10-07 15:19:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:11,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450004593] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:11,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:11,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16] total 23 [2021-10-07 15:19:11,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960308771] [2021-10-07 15:19:11,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:19:11,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:11,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:19:11,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:19:11,464 INFO L87 Difference]: Start difference. First operand 16304 states and 56694 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:15,140 INFO L93 Difference]: Finished difference Result 17849 states and 58655 transitions. [2021-10-07 15:19:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-07 15:19:15,141 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:19:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:15,185 INFO L225 Difference]: With dead ends: 17849 [2021-10-07 15:19:15,186 INFO L226 Difference]: Without dead ends: 16923 [2021-10-07 15:19:15,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2814.9ms TimeCoverageRelationStatistics Valid=601, Invalid=4229, Unknown=0, NotChecked=0, Total=4830 [2021-10-07 15:19:15,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16923 states. [2021-10-07 15:19:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16923 to 11786. [2021-10-07 15:19:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11786 states, 11780 states have (on average 3.4818336162988115) internal successors, (41016), 11785 states have internal predecessors, (41016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11786 states to 11786 states and 41016 transitions. [2021-10-07 15:19:15,482 INFO L78 Accepts]: Start accepts. Automaton has 11786 states and 41016 transitions. Word has length 27 [2021-10-07 15:19:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:15,482 INFO L470 AbstractCegarLoop]: Abstraction has 11786 states and 41016 transitions. [2021-10-07 15:19:15,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 11786 states and 41016 transitions. [2021-10-07 15:19:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:19:15,488 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:15,488 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:15,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:15,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-10-07 15:19:15,689 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:19:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2139470246, now seen corresponding path program 34 times [2021-10-07 15:19:15,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:15,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828145683] [2021-10-07 15:19:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:15,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-07 15:19:15,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:15,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828145683] [2021-10-07 15:19:15,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828145683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:15,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152470554] [2021-10-07 15:19:15,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:19:15,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:15,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:15,947 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:15,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-10-07 15:19:18,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:19:18,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:18,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-07 15:19:18,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:19,704 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:19:19,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-10-07 15:19:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:19,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152470554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:19,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:19,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 22 [2021-10-07 15:19:19,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764078965] [2021-10-07 15:19:19,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-07 15:19:19,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-07 15:19:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-10-07 15:19:19,920 INFO L87 Difference]: Start difference. First operand 11786 states and 41016 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:21,224 INFO L93 Difference]: Finished difference Result 18386 states and 62227 transitions. [2021-10-07 15:19:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-07 15:19:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:19:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:21,274 INFO L225 Difference]: With dead ends: 18386 [2021-10-07 15:19:21,274 INFO L226 Difference]: Without dead ends: 18196 [2021-10-07 15:19:21,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 967.6ms TimeCoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2021-10-07 15:19:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18196 states. [2021-10-07 15:19:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18196 to 11748. [2021-10-07 15:19:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11748 states, 11742 states have (on average 3.4771759495826946) internal successors, (40829), 11747 states have internal predecessors, (40829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11748 states to 11748 states and 40829 transitions. [2021-10-07 15:19:21,642 INFO L78 Accepts]: Start accepts. Automaton has 11748 states and 40829 transitions. Word has length 27 [2021-10-07 15:19:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:21,642 INFO L470 AbstractCegarLoop]: Abstraction has 11748 states and 40829 transitions. [2021-10-07 15:19:21,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 11748 states and 40829 transitions. [2021-10-07 15:19:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:19:21,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:21,647 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:21,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:21,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-10-07 15:19:21,848 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:19:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1591478141, now seen corresponding path program 18 times [2021-10-07 15:19:21,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:21,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869394532] [2021-10-07 15:19:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:21,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:19:22,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:22,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869394532] [2021-10-07 15:19:22,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869394532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:22,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156202678] [2021-10-07 15:19:22,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:19:22,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:22,138 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:22,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-10-07 15:19:25,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-07 15:19:25,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:25,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-07 15:19:25,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:25,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-07 15:19:25,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:19:25,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:19:25,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:19:26,208 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:19:26,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-10-07 15:19:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 15:19:26,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156202678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:26,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:26,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 24 [2021-10-07 15:19:26,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272754461] [2021-10-07 15:19:26,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:19:26,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:19:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:19:26,579 INFO L87 Difference]: Start difference. First operand 11748 states and 40829 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:30,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:30,426 INFO L93 Difference]: Finished difference Result 14138 states and 46920 transitions. [2021-10-07 15:19:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-07 15:19:30,427 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:19:30,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:30,462 INFO L225 Difference]: With dead ends: 14138 [2021-10-07 15:19:30,462 INFO L226 Difference]: Without dead ends: 13946 [2021-10-07 15:19:30,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3112.9ms TimeCoverageRelationStatistics Valid=472, Invalid=2720, Unknown=0, NotChecked=0, Total=3192 [2021-10-07 15:19:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13946 states. [2021-10-07 15:19:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13946 to 11592. [2021-10-07 15:19:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11592 states, 11586 states have (on average 3.4776454341446574) internal successors, (40292), 11591 states have internal predecessors, (40292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11592 states to 11592 states and 40292 transitions. [2021-10-07 15:19:30,769 INFO L78 Accepts]: Start accepts. Automaton has 11592 states and 40292 transitions. Word has length 27 [2021-10-07 15:19:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:30,769 INFO L470 AbstractCegarLoop]: Abstraction has 11592 states and 40292 transitions. [2021-10-07 15:19:30,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 11592 states and 40292 transitions. [2021-10-07 15:19:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:19:30,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:30,774 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:30,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-10-07 15:19:30,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:30,981 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:19:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:30,982 INFO L82 PathProgramCache]: Analyzing trace with hash 275473795, now seen corresponding path program 19 times [2021-10-07 15:19:30,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:30,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988938950] [2021-10-07 15:19:30,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:30,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:19:31,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988938950] [2021-10-07 15:19:31,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988938950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908571984] [2021-10-07 15:19:31,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-07 15:19:31,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:31,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:31,388 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:31,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-10-07 15:19:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:34,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-07 15:19:34,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:34,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:19:34,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:19:34,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-10-07 15:19:35,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:19:35,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-10-07 15:19:35,181 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:19:35,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:19:35,325 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:19:35,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:19:36,217 INFO L354 Elim1Store]: treesize reduction 141, result has 18.0 percent of original size [2021-10-07 15:19:36,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 67 [2021-10-07 15:19:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:36,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908571984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:36,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:36,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 27 [2021-10-07 15:19:36,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252412602] [2021-10-07 15:19:36,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-07 15:19:36,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:36,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-07 15:19:36,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-10-07 15:19:36,886 INFO L87 Difference]: Start difference. First operand 11592 states and 40292 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:40,169 INFO L93 Difference]: Finished difference Result 13498 states and 45424 transitions. [2021-10-07 15:19:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-07 15:19:40,170 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:19:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:40,201 INFO L225 Difference]: With dead ends: 13498 [2021-10-07 15:19:40,201 INFO L226 Difference]: Without dead ends: 13128 [2021-10-07 15:19:40,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2394.6ms TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-10-07 15:19:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2021-10-07 15:19:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 11517. [2021-10-07 15:19:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11517 states, 11511 states have (on average 3.478672574059595) internal successors, (40043), 11516 states have internal predecessors, (40043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11517 states to 11517 states and 40043 transitions. [2021-10-07 15:19:40,436 INFO L78 Accepts]: Start accepts. Automaton has 11517 states and 40043 transitions. Word has length 27 [2021-10-07 15:19:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:40,436 INFO L470 AbstractCegarLoop]: Abstraction has 11517 states and 40043 transitions. [2021-10-07 15:19:40,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 11517 states and 40043 transitions. [2021-10-07 15:19:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:19:40,441 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:40,441 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:40,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-10-07 15:19:40,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-10-07 15:19:40,643 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:19:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1300234958, now seen corresponding path program 35 times [2021-10-07 15:19:40,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:40,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517015887] [2021-10-07 15:19:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:40,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:41,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:41,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517015887] [2021-10-07 15:19:41,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517015887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:41,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511005506] [2021-10-07 15:19:41,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-07 15:19:41,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:41,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:41,582 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:41,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-10-07 15:19:44,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-07 15:19:44,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-07 15:19:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:19:47,039 INFO L354 Elim1Store]: treesize reduction 642, result has 11.6 percent of original size [2021-10-07 15:19:47,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 109 treesize of output 126 [2021-10-07 15:19:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:47,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511005506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:47,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:19:47,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:19:47,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750976432] [2021-10-07 15:19:47,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:19:47,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:19:47,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:19:47,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:19:47,170 INFO L87 Difference]: Start difference. First operand 11517 states and 40043 transitions. Second operand has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:19:53,397 INFO L93 Difference]: Finished difference Result 13206 states and 44113 transitions. [2021-10-07 15:19:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-07 15:19:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:19:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:19:53,432 INFO L225 Difference]: With dead ends: 13206 [2021-10-07 15:19:53,432 INFO L226 Difference]: Without dead ends: 13206 [2021-10-07 15:19:53,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 5759.0ms TimeCoverageRelationStatistics Valid=347, Invalid=3313, Unknown=0, NotChecked=0, Total=3660 [2021-10-07 15:19:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13206 states. [2021-10-07 15:19:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13206 to 11493. [2021-10-07 15:19:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11493 states, 11487 states have (on average 3.480107948115261) internal successors, (39976), 11492 states have internal predecessors, (39976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11493 states to 11493 states and 39976 transitions. [2021-10-07 15:19:53,824 INFO L78 Accepts]: Start accepts. Automaton has 11493 states and 39976 transitions. Word has length 27 [2021-10-07 15:19:53,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:19:53,824 INFO L470 AbstractCegarLoop]: Abstraction has 11493 states and 39976 transitions. [2021-10-07 15:19:53,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:19:53,824 INFO L276 IsEmpty]: Start isEmpty. Operand 11493 states and 39976 transitions. [2021-10-07 15:19:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:19:53,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:19:53,832 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:19:53,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-10-07 15:19:54,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:54,047 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:19:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:19:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1300234959, now seen corresponding path program 20 times [2021-10-07 15:19:54,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:19:54,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103623923] [2021-10-07 15:19:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:19:54,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:19:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:19:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:19:55,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:19:55,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103623923] [2021-10-07 15:19:55,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103623923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:19:55,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125454411] [2021-10-07 15:19:55,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 15:19:55,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:19:55,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:19:55,124 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:19:55,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-10-07 15:19:58,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 15:19:58,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:19:58,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-07 15:19:58,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:20:00,057 INFO L354 Elim1Store]: treesize reduction 156, result has 17.9 percent of original size [2021-10-07 15:20:00,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 78 [2021-10-07 15:20:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:00,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125454411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:00,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:20:00,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-10-07 15:20:00,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100831127] [2021-10-07 15:20:00,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-07 15:20:00,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:20:00,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-07 15:20:00,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-10-07 15:20:00,219 INFO L87 Difference]: Start difference. First operand 11493 states and 39976 transitions. Second operand has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:20:07,881 INFO L93 Difference]: Finished difference Result 13808 states and 45416 transitions. [2021-10-07 15:20:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-07 15:20:07,882 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:20:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:20:07,916 INFO L225 Difference]: With dead ends: 13808 [2021-10-07 15:20:07,916 INFO L226 Difference]: Without dead ends: 13498 [2021-10-07 15:20:07,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 6217.0ms TimeCoverageRelationStatistics Valid=795, Invalid=5367, Unknown=0, NotChecked=0, Total=6162 [2021-10-07 15:20:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13498 states. [2021-10-07 15:20:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13498 to 11305. [2021-10-07 15:20:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11305 states, 11299 states have (on average 3.4780069032657757) internal successors, (39298), 11304 states have internal predecessors, (39298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11305 states to 11305 states and 39298 transitions. [2021-10-07 15:20:08,174 INFO L78 Accepts]: Start accepts. Automaton has 11305 states and 39298 transitions. Word has length 27 [2021-10-07 15:20:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:20:08,174 INFO L470 AbstractCegarLoop]: Abstraction has 11305 states and 39298 transitions. [2021-10-07 15:20:08,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 11305 states and 39298 transitions. [2021-10-07 15:20:08,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:20:08,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:20:08,254 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:20:08,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-10-07 15:20:08,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-10-07 15:20:08,455 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:20:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:20:08,456 INFO L82 PathProgramCache]: Analyzing trace with hash -750438590, now seen corresponding path program 36 times [2021-10-07 15:20:08,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:20:08,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024383766] [2021-10-07 15:20:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:20:08,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:20:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:20:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-07 15:20:08,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:20:08,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024383766] [2021-10-07 15:20:08,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024383766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:08,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409484536] [2021-10-07 15:20:08,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-07 15:20:08,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:08,669 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:20:08,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-10-07 15:20:11,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-07 15:20:11,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:20:11,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-07 15:20:12,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:20:12,677 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-07 15:20:12,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-10-07 15:20:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:12,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409484536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:12,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:20:12,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 23 [2021-10-07 15:20:12,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441794162] [2021-10-07 15:20:12,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-07 15:20:12,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:20:12,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-07 15:20:12,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-10-07 15:20:12,823 INFO L87 Difference]: Start difference. First operand 11305 states and 39298 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:14,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:20:14,525 INFO L93 Difference]: Finished difference Result 17417 states and 58601 transitions. [2021-10-07 15:20:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-07 15:20:14,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:20:14,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:20:14,568 INFO L225 Difference]: With dead ends: 17417 [2021-10-07 15:20:14,568 INFO L226 Difference]: Without dead ends: 17101 [2021-10-07 15:20:14,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1045.7ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-10-07 15:20:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17101 states. [2021-10-07 15:20:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17101 to 10811. [2021-10-07 15:20:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10811 states, 10805 states have (on average 3.485238315594632) internal successors, (37658), 10810 states have internal predecessors, (37658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10811 states to 10811 states and 37658 transitions. [2021-10-07 15:20:14,821 INFO L78 Accepts]: Start accepts. Automaton has 10811 states and 37658 transitions. Word has length 27 [2021-10-07 15:20:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:20:14,822 INFO L470 AbstractCegarLoop]: Abstraction has 10811 states and 37658 transitions. [2021-10-07 15:20:14,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 10811 states and 37658 transitions. [2021-10-07 15:20:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:20:14,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:20:14,827 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:20:14,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-10-07 15:20:15,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-10-07 15:20:15,027 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:20:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:20:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash -880045437, now seen corresponding path program 21 times [2021-10-07 15:20:15,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:20:15,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434117781] [2021-10-07 15:20:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:20:15,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:20:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:20:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-07 15:20:15,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:20:15,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434117781] [2021-10-07 15:20:15,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434117781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:15,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748523294] [2021-10-07 15:20:15,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-07 15:20:15,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:15,290 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:20:15,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-10-07 15:20:18,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-07 15:20:18,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:20:18,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-07 15:20:18,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:20:19,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-07 15:20:19,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:20:19,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-07 15:20:19,452 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-10-07 15:20:19,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-10-07 15:20:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-07 15:20:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748523294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:20,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:20:20,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 24 [2021-10-07 15:20:20,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901592732] [2021-10-07 15:20:20,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-07 15:20:20,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:20:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-07 15:20:20,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-10-07 15:20:20,183 INFO L87 Difference]: Start difference. First operand 10811 states and 37658 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 15:20:24,305 INFO L93 Difference]: Finished difference Result 14739 states and 49073 transitions. [2021-10-07 15:20:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-07 15:20:24,306 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-07 15:20:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 15:20:24,341 INFO L225 Difference]: With dead ends: 14739 [2021-10-07 15:20:24,341 INFO L226 Difference]: Without dead ends: 14609 [2021-10-07 15:20:24,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3313.9ms TimeCoverageRelationStatistics Valid=502, Invalid=3158, Unknown=0, NotChecked=0, Total=3660 [2021-10-07 15:20:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14609 states. [2021-10-07 15:20:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14609 to 11289. [2021-10-07 15:20:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11289 states, 11283 states have (on average 3.513781795621732) internal successors, (39646), 11288 states have internal predecessors, (39646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11289 states to 11289 states and 39646 transitions. [2021-10-07 15:20:24,588 INFO L78 Accepts]: Start accepts. Automaton has 11289 states and 39646 transitions. Word has length 27 [2021-10-07 15:20:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 15:20:24,589 INFO L470 AbstractCegarLoop]: Abstraction has 11289 states and 39646 transitions. [2021-10-07 15:20:24,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 15:20:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 11289 states and 39646 transitions. [2021-10-07 15:20:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-07 15:20:24,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 15:20:24,593 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 15:20:24,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-10-07 15:20:24,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:24,794 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2021-10-07 15:20:24,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 15:20:24,795 INFO L82 PathProgramCache]: Analyzing trace with hash -876081777, now seen corresponding path program 22 times [2021-10-07 15:20:24,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 15:20:24,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137123516] [2021-10-07 15:20:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 15:20:24,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 15:20:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 15:20:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:25,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 15:20:25,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137123516] [2021-10-07 15:20:25,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137123516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:25,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577960919] [2021-10-07 15:20:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-07 15:20:25,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:25,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 15:20:25,841 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-07 15:20:25,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-10-07 15:20:29,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-07 15:20:29,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 15:20:29,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-07 15:20:29,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 15:20:29,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-07 15:20:29,683 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:20:29,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:20:29,842 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-07 15:20:29,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-10-07 15:20:30,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:20:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:20:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-07 15:20:30,651 INFO L354 Elim1Store]: treesize reduction 176, result has 19.6 percent of original size [2021-10-07 15:20:30,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 71 [2021-10-07 15:20:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 15:20:31,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577960919] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 15:20:31,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 15:20:31,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 29 [2021-10-07 15:20:31,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556666780] [2021-10-07 15:20:31,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-07 15:20:31,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 15:20:31,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-07 15:20:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=865, Unknown=0, NotChecked=0, Total=930 [2021-10-07 15:20:31,428 INFO L87 Difference]: Start difference. First operand 11289 states and 39646 transitions. Second operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-10-07 15:20:34,171 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 15:20:34,171 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-10-07 15:20:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-07 15:20:34,198 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-10-07 15:20:34,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 15:20:34,400 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). [2021-10-07 15:20:34,403 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,403 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,403 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,404 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,404 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,404 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,404 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,404 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,404 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,404 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,405 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 15:20:34,405 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 15:20:34,405 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 15:20:34,405 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,405 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,405 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,405 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,405 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,406 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,406 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 15:20:34,412 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 15:20:34,412 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 15:20:34,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 03:20:34 BasicIcfg [2021-10-07 15:20:34,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 15:20:34,414 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.witnessprinter [2021-10-07 15:20:34,415 INFO L168 Benchmark]: Toolchain (without parser) took 717062.22 ms. Allocated memory was 161.5 MB in the beginning and 3.3 GB in the end (delta: 3.2 GB). Free memory was 136.2 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 609.9 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:34,415 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 161.5 MB. Free memory is still 133.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 15:20:34,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.70 ms. Allocated memory is still 161.5 MB. Free memory was 135.8 MB in the beginning and 125.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:34,415 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.61 ms. Allocated memory is still 161.5 MB. Free memory was 125.0 MB in the beginning and 122.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:34,416 INFO L168 Benchmark]: Boogie Preprocessor took 45.95 ms. Allocated memory is still 161.5 MB. Free memory was 122.9 MB in the beginning and 121.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:34,416 INFO L168 Benchmark]: RCFGBuilder took 848.45 ms. Allocated memory is still 161.5 MB. Free memory was 121.4 MB in the beginning and 128.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:34,416 INFO L168 Benchmark]: TraceAbstraction took 715788.50 ms. Allocated memory was 161.5 MB in the beginning and 3.3 GB in the end (delta: 3.2 GB). Free memory was 128.4 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 601.9 MB. Max. memory is 8.0 GB. [2021-10-07 15:20:34,417 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 161.5 MB. Free memory is still 133.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 307.70 ms. Allocated memory is still 161.5 MB. Free memory was 135.8 MB in the beginning and 125.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 52.61 ms. Allocated memory is still 161.5 MB. Free memory was 125.0 MB in the beginning and 122.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.95 ms. Allocated memory is still 161.5 MB. Free memory was 122.9 MB in the beginning and 121.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 848.45 ms. Allocated memory is still 161.5 MB. Free memory was 121.4 MB in the beginning and 128.9 MB in the end (delta: -7.5 MB). Peak memory consumption was 15.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 715788.50 ms. Allocated memory was 161.5 MB in the beginning and 3.3 GB in the end (delta: 3.2 GB). Free memory was 128.4 MB in the beginning and 2.7 GB in the end (delta: -2.6 GB). Peak memory consumption was 601.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7225.2ms, 137 PlacesBefore, 44 PlacesAfterwards, 137 TransitionsBefore, 38 TransitionsAfterwards, 1464 CoEnabledTransitionPairs, 8 FixpointIterations, 72 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 9 TrivialYvCompositions, 5 ConcurrentYvCompositions, 6 ChoiceCompositions, 126 TotalNumberOfCompositions, 5168 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3218, positive: 3001, positive conditional: 0, positive unconditional: 3001, negative: 217, negative conditional: 0, negative unconditional: 217, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1060, positive: 1021, positive conditional: 0, positive unconditional: 1021, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1060, positive: 1011, positive conditional: 0, positive unconditional: 1011, negative: 49, negative conditional: 0, negative unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 49, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 39, negative conditional: 0, negative unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 178, positive: 55, positive conditional: 0, positive unconditional: 55, negative: 124, negative conditional: 0, negative unconditional: 124, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3218, positive: 1980, positive conditional: 0, positive unconditional: 1980, negative: 178, negative conditional: 0, negative unconditional: 178, unknown: 1060, unknown conditional: 0, unknown unconditional: 1060] , Statistics on independence cache: Total cache size (in pairs): 186, Positive cache size: 168, Positive conditional cache size: 0, Positive unconditional cache size: 168, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 113]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (11289states) and FLOYD_HOARE automaton (currently 20 states, 31 states before enhancement),while ReachableStatesComputation was computing reachable states (1264 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 162 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 715549.6ms, OverallIterations: 122, TraceHistogramMax: 5, EmptinessCheckTime: 613.5ms, AutomataDifference: 316140.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7330.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4734 SDtfs, 23451 SDslu, 55811 SDs, 0 SdLazy, 125697 SolverSat, 6636 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 111236.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5768 GetRequests, 1267 SyntacticMatches, 16 SemanticMatches, 4485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45842 ImplicationChecksByTransitivity, 244934.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18988occurred in iteration=106, InterpolantAutomatonStates: 3109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25832.3ms AutomataMinimizationTime, 121 MinimizatonAttempts, 272178 StatesRemovedByMinimization, 116 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1238.4ms SsaConstructionTime, 9012.3ms SatisfiabilityAnalysisTime, 153735.9ms InterpolantComputationTime, 5082 NumberOfCodeBlocks, 5049 NumberOfCodeBlocksAsserted, 407 NumberOfCheckSat, 4846 ConstructedInterpolants, 350 QuantifiedInterpolants, 134654 SizeOfPredicates, 1876 NumberOfNonLiveVariables, 25163 ConjunctsInSsa, 5486 ConjunctsInUnsatCore, 236 InterpolantComputations, 13 PerfectInterpolantSequences, 866/4438 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown