/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Overflow-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-07 14:54:48,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-07 14:54:48,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-07 14:54:48,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-07 14:54:48,733 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 14:54:48,762 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-07 14:54:48,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-07 14:54:48,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-07 14:54:48,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-07 14:54:48,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-07 14:54:48,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-07 14:54:48,765 INFO L138 SettingsManager]: * Use SBE=true [2021-10-07 14:54:48,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-07 14:54:48,765 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-07 14:54:48,766 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-07 14:54:48,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-07 14:54:48,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-07 14:54:48,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-07 14:54:48,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-07 14:54:48,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-07 14:54:48,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-07 14:54:48,767 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-07 14:54:48,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-07 14:54:48,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-07 14:54:48,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-07 14:54:48,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-07 14:54:48,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-07 14:54:48,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-07 14:54:48,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-07 14:54:48,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 14:54:48,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-07 14:54:48,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-07 14:54:48,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-07 14:54:48,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-07 14:54:48,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-07 14:54:48,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-07 14:54:48,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-07 14:54:48,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-07 14:54:49,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-07 14:54:49,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-07 14:54:49,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-07 14:54:49,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-07 14:54:49,165 INFO L275 PluginConnector]: CDTParser initialized [2021-10-07 14:54:49,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2021-10-07 14:54:49,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1641dd24e/2123ddaf34ed4acc95b02165575c5ab5/FLAGc76b08153 [2021-10-07 14:54:49,908 INFO L306 CDTParser]: Found 1 translation units. [2021-10-07 14:54:49,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2021-10-07 14:54:49,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1641dd24e/2123ddaf34ed4acc95b02165575c5ab5/FLAGc76b08153 [2021-10-07 14:54:50,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1641dd24e/2123ddaf34ed4acc95b02165575c5ab5 [2021-10-07 14:54:50,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-07 14:54:50,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-07 14:54:50,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-07 14:54:50,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-07 14:54:50,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-07 14:54:50,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4274d1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50, skipping insertion in model container [2021-10-07 14:54:50,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-07 14:54:50,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-07 14:54:50,592 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2413,2426] [2021-10-07 14:54:50,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 14:54:50,604 INFO L203 MainTranslator]: Completed pre-run [2021-10-07 14:54:50,629 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c[2413,2426] [2021-10-07 14:54:50,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-07 14:54:50,647 INFO L208 MainTranslator]: Completed translation [2021-10-07 14:54:50,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50 WrapperNode [2021-10-07 14:54:50,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-07 14:54:50,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-07 14:54:50,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-07 14:54:50,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-07 14:54:50,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-07 14:54:50,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-07 14:54:50,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-07 14:54:50,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-07 14:54:50,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-07 14:54:50,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-07 14:54:50,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-07 14:54:50,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-07 14:54:50,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (1/1) ... [2021-10-07 14:54:50,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-07 14:54:50,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:54:50,766 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 14:54:50,780 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 14:54:50,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-07 14:54:50,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-07 14:54:50,841 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-07 14:54:50,842 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-07 14:54:50,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-07 14:54:50,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-07 14:54:50,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-07 14:54:50,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-07 14:54:50,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-07 14:54:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-07 14:54:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-07 14:54:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-07 14:54:50,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-07 14:54:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-07 14:54:50,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-07 14:54:50,848 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 14:54:51,363 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-07 14:54:51,363 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-07 14:54:51,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:54:51 BoogieIcfgContainer [2021-10-07 14:54:51,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-07 14:54:51,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-07 14:54:51,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-07 14:54:51,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-07 14:54:51,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 02:54:50" (1/3) ... [2021-10-07 14:54:51,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350ce32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:54:51, skipping insertion in model container [2021-10-07 14:54:51,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 02:54:50" (2/3) ... [2021-10-07 14:54:51,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350ce32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 02:54:51, skipping insertion in model container [2021-10-07 14:54:51,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:54:51" (3/3) ... [2021-10-07 14:54:51,376 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2021-10-07 14:54:51,382 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-07 14:54:51,382 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-07 14:54:51,391 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-07 14:54:51,391 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-07 14:54:51,449 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,450 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,450 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,450 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,451 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,453 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,453 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,453 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,454 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,454 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,454 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,455 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,455 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,455 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,456 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,460 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,464 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,464 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,465 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,465 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,467 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,467 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,468 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,468 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,478 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,478 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,485 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,489 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,492 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,492 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,492 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,493 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-07 14:54:51,521 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-07 14:54:51,578 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-07 14:54:51,587 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 14:54:51,587 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-07 14:54:51,606 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-07 14:54:51,619 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 106 transitions, 236 flow [2021-10-07 14:54:51,622 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 106 transitions, 236 flow [2021-10-07 14:54:51,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 109 places, 106 transitions, 236 flow [2021-10-07 14:54:51,728 INFO L129 PetriNetUnfolder]: 7/103 cut-off events. [2021-10-07 14:54:51,729 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-07 14:54:51,734 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 7/103 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 118 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2021-10-07 14:54:51,738 INFO L116 LiptonReduction]: Number of co-enabled transitions 1602 [2021-10-07 14:54:55,950 INFO L131 LiptonReduction]: Checked pairs total: 4962 [2021-10-07 14:54:55,950 INFO L133 LiptonReduction]: Total number of compositions: 88 [2021-10-07 14:54:55,967 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 38 transitions, 100 flow [2021-10-07 14:54:56,022 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 592 states, 567 states have (on average 3.271604938271605) internal successors, (1855), 591 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 592 states, 567 states have (on average 3.271604938271605) internal successors, (1855), 591 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 14:54:56,035 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:56,036 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 14:54:56,037 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash 12776196, now seen corresponding path program 1 times [2021-10-07 14:54:56,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:56,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833563907] [2021-10-07 14:54:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:56,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:56,280 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 14:54:56,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:56,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833563907] [2021-10-07 14:54:56,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833563907] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:56,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:56,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-07 14:54:56,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501580799] [2021-10-07 14:54:56,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 14:54:56,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:56,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 14:54:56,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:56,311 INFO L87 Difference]: Start difference. First operand has 592 states, 567 states have (on average 3.271604938271605) internal successors, (1855), 591 states have internal predecessors, (1855), 0 states have call successors, (0), 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 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:56,404 INFO L93 Difference]: Finished difference Result 986 states and 3064 transitions. [2021-10-07 14:54:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 14:54:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 14:54:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:56,436 INFO L225 Difference]: With dead ends: 986 [2021-10-07 14:54:56,436 INFO L226 Difference]: Without dead ends: 982 [2021-10-07 14:54:56,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-10-07 14:54:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 856. [2021-10-07 14:54:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 832 states have (on average 3.449519230769231) internal successors, (2870), 855 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2870 transitions. [2021-10-07 14:54:56,558 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2870 transitions. Word has length 4 [2021-10-07 14:54:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:56,560 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 2870 transitions. [2021-10-07 14:54:56,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,560 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2870 transitions. [2021-10-07 14:54:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-07 14:54:56,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:56,561 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-07 14:54:56,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-07 14:54:56,562 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:56,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:56,563 INFO L82 PathProgramCache]: Analyzing trace with hash 12776197, now seen corresponding path program 1 times [2021-10-07 14:54:56,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:56,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141501079] [2021-10-07 14:54:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:56,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:56,618 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 14:54:56,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:56,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141501079] [2021-10-07 14:54:56,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141501079] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:56,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:56,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-07 14:54:56,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305644465] [2021-10-07 14:54:56,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 14:54:56,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:56,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 14:54:56,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:56,623 INFO L87 Difference]: Start difference. First operand 856 states and 2870 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:56,681 INFO L93 Difference]: Finished difference Result 1430 states and 4686 transitions. [2021-10-07 14:54:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 14:54:56,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-07 14:54:56,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:56,696 INFO L225 Difference]: With dead ends: 1430 [2021-10-07 14:54:56,696 INFO L226 Difference]: Without dead ends: 1424 [2021-10-07 14:54:56,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:56,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-10-07 14:54:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1276. [2021-10-07 14:54:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1252 states have (on average 3.5399361022364215) internal successors, (4432), 1275 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4432 transitions. [2021-10-07 14:54:56,762 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4432 transitions. Word has length 4 [2021-10-07 14:54:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:56,763 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 4432 transitions. [2021-10-07 14:54:56,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4432 transitions. [2021-10-07 14:54:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 14:54:56,764 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:56,764 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 14:54:56,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-07 14:54:56,765 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash -604127505, now seen corresponding path program 1 times [2021-10-07 14:54:56,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:56,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823337791] [2021-10-07 14:54:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:56,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:56,864 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 14:54:56,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:56,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823337791] [2021-10-07 14:54:56,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823337791] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:56,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:56,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-07 14:54:56,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583594169] [2021-10-07 14:54:56,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:54:56,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:56,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:54:56,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:56,867 INFO L87 Difference]: Start difference. First operand 1276 states and 4432 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:56,924 INFO L93 Difference]: Finished difference Result 1578 states and 5118 transitions. [2021-10-07 14:54:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:54:56,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 14:54:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:56,940 INFO L225 Difference]: With dead ends: 1578 [2021-10-07 14:54:56,941 INFO L226 Difference]: Without dead ends: 1578 [2021-10-07 14:54:56,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-10-07 14:54:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1446. [2021-10-07 14:54:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1422 states have (on average 3.3684950773558366) internal successors, (4790), 1445 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4790 transitions. [2021-10-07 14:54:57,004 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4790 transitions. Word has length 6 [2021-10-07 14:54:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:57,004 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4790 transitions. [2021-10-07 14:54:57,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4790 transitions. [2021-10-07 14:54:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-07 14:54:57,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:57,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-07 14:54:57,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-07 14:54:57,006 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:57,007 INFO L82 PathProgramCache]: Analyzing trace with hash -604127511, now seen corresponding path program 1 times [2021-10-07 14:54:57,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:57,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456270433] [2021-10-07 14:54:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:57,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:57,052 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 14:54:57,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:57,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456270433] [2021-10-07 14:54:57,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456270433] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:57,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:57,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 14:54:57,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584208850] [2021-10-07 14:54:57,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 14:54:57,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:57,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 14:54:57,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:57,077 INFO L87 Difference]: Start difference. First operand 1446 states and 4790 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:57,145 INFO L93 Difference]: Finished difference Result 1948 states and 6438 transitions. [2021-10-07 14:54:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 14:54:57,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-07 14:54:57,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:57,163 INFO L225 Difference]: With dead ends: 1948 [2021-10-07 14:54:57,164 INFO L226 Difference]: Without dead ends: 1942 [2021-10-07 14:54:57,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-10-07 14:54:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1734. [2021-10-07 14:54:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1708 states have (on average 3.4754098360655736) internal successors, (5936), 1733 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5936 transitions. [2021-10-07 14:54:57,242 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5936 transitions. Word has length 6 [2021-10-07 14:54:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:57,243 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 5936 transitions. [2021-10-07 14:54:57,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5936 transitions. [2021-10-07 14:54:57,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 14:54:57,245 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:57,246 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:57,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-07 14:54:57,246 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash -672936248, now seen corresponding path program 1 times [2021-10-07 14:54:57,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:57,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556454254] [2021-10-07 14:54:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:57,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:57,348 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 14:54:57,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:57,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556454254] [2021-10-07 14:54:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556454254] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:57,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:57,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 14:54:57,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659702044] [2021-10-07 14:54:57,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:54:57,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:54:57,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:57,352 INFO L87 Difference]: Start difference. First operand 1734 states and 5936 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 14:54:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:57,443 INFO L93 Difference]: Finished difference Result 2390 states and 8116 transitions. [2021-10-07 14:54:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:54:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 14:54:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:57,469 INFO L225 Difference]: With dead ends: 2390 [2021-10-07 14:54:57,469 INFO L226 Difference]: Without dead ends: 2390 [2021-10-07 14:54:57,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:57,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-10-07 14:54:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1886. [2021-10-07 14:54:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1860 states have (on average 3.5268817204301075) internal successors, (6560), 1885 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6560 transitions. [2021-10-07 14:54:57,566 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6560 transitions. Word has length 8 [2021-10-07 14:54:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:57,566 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 6560 transitions. [2021-10-07 14:54:57,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 14:54:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6560 transitions. [2021-10-07 14:54:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 14:54:57,577 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:57,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:57,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-07 14:54:57,578 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:57,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash -743068487, now seen corresponding path program 1 times [2021-10-07 14:54:57,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:57,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265816560] [2021-10-07 14:54:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:57,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:54:57,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:57,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265816560] [2021-10-07 14:54:57,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265816560] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:57,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:57,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 14:54:57,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480384686] [2021-10-07 14:54:57,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-07 14:54:57,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-07 14:54:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:57,673 INFO L87 Difference]: Start difference. First operand 1886 states and 6560 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 14:54:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:57,746 INFO L93 Difference]: Finished difference Result 2678 states and 9366 transitions. [2021-10-07 14:54:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-07 14:54:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 14:54:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:57,772 INFO L225 Difference]: With dead ends: 2678 [2021-10-07 14:54:57,773 INFO L226 Difference]: Without dead ends: 2672 [2021-10-07 14:54:57,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-07 14:54:57,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-10-07 14:54:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2148. [2021-10-07 14:54:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2148 states, 2120 states have (on average 3.688679245283019) internal successors, (7820), 2147 states have internal predecessors, (7820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 7820 transitions. [2021-10-07 14:54:57,920 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 7820 transitions. Word has length 8 [2021-10-07 14:54:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:57,920 INFO L470 AbstractCegarLoop]: Abstraction has 2148 states and 7820 transitions. [2021-10-07 14:54:57,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 14:54:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 7820 transitions. [2021-10-07 14:54:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 14:54:57,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:57,923 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:57,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-07 14:54:57,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:57,924 INFO L82 PathProgramCache]: Analyzing trace with hash -38090996, now seen corresponding path program 1 times [2021-10-07 14:54:57,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:57,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545075708] [2021-10-07 14:54:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:57,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:58,013 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 14:54:58,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:58,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545075708] [2021-10-07 14:54:58,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545075708] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:58,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:58,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-07 14:54:58,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247543625] [2021-10-07 14:54:58,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:54:58,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:58,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:54:58,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:58,020 INFO L87 Difference]: Start difference. First operand 2148 states and 7820 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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 14:54:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:58,113 INFO L93 Difference]: Finished difference Result 3584 states and 12466 transitions. [2021-10-07 14:54:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:54:58,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 14:54:58,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:58,149 INFO L225 Difference]: With dead ends: 3584 [2021-10-07 14:54:58,149 INFO L226 Difference]: Without dead ends: 3572 [2021-10-07 14:54:58,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-10-07 14:54:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2272. [2021-10-07 14:54:58,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2245 states have (on average 3.6721603563474385) internal successors, (8244), 2271 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 8244 transitions. [2021-10-07 14:54:58,259 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 8244 transitions. Word has length 8 [2021-10-07 14:54:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:58,260 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 8244 transitions. [2021-10-07 14:54:58,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 14:54:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 8244 transitions. [2021-10-07 14:54:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-07 14:54:58,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:58,261 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:58,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-07 14:54:58,262 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:58,262 INFO L82 PathProgramCache]: Analyzing trace with hash -35394509, now seen corresponding path program 1 times [2021-10-07 14:54:58,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:58,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716527261] [2021-10-07 14:54:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:58,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:58,291 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 14:54:58,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:58,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716527261] [2021-10-07 14:54:58,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716527261] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:58,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:58,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-07 14:54:58,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290880878] [2021-10-07 14:54:58,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:54:58,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:58,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:54:58,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:58,301 INFO L87 Difference]: Start difference. First operand 2272 states and 8244 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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 14:54:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:58,380 INFO L93 Difference]: Finished difference Result 3316 states and 11462 transitions. [2021-10-07 14:54:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:54:58,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 14:54:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:58,430 INFO L225 Difference]: With dead ends: 3316 [2021-10-07 14:54:58,430 INFO L226 Difference]: Without dead ends: 3304 [2021-10-07 14:54:58,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-10-07 14:54:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2288. [2021-10-07 14:54:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2263 states have (on average 3.603181617322139) internal successors, (8154), 2287 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8154 transitions. [2021-10-07 14:54:58,555 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8154 transitions. Word has length 8 [2021-10-07 14:54:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:58,556 INFO L470 AbstractCegarLoop]: Abstraction has 2288 states and 8154 transitions. [2021-10-07 14:54:58,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 14:54:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8154 transitions. [2021-10-07 14:54:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 14:54:58,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:58,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:58,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-07 14:54:58,558 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1312835479, now seen corresponding path program 1 times [2021-10-07 14:54:58,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:58,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985299930] [2021-10-07 14:54:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:58,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:58,597 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 14:54:58,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:58,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985299930] [2021-10-07 14:54:58,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985299930] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:58,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:58,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 14:54:58,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513762359] [2021-10-07 14:54:58,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:54:58,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:58,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:54:58,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:58,601 INFO L87 Difference]: Start difference. First operand 2288 states and 8154 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 14:54:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:58,684 INFO L93 Difference]: Finished difference Result 4136 states and 14566 transitions. [2021-10-07 14:54:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:54:58,685 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 14:54:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:58,710 INFO L225 Difference]: With dead ends: 4136 [2021-10-07 14:54:58,710 INFO L226 Difference]: Without dead ends: 4130 [2021-10-07 14:54:58,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4130 states. [2021-10-07 14:54:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4130 to 3378. [2021-10-07 14:54:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3353 states have (on average 3.7488815985684463) internal successors, (12570), 3377 states have internal predecessors, (12570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 12570 transitions. [2021-10-07 14:54:58,878 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 12570 transitions. Word has length 9 [2021-10-07 14:54:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:58,879 INFO L470 AbstractCegarLoop]: Abstraction has 3378 states and 12570 transitions. [2021-10-07 14:54:58,879 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 14:54:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 12570 transitions. [2021-10-07 14:54:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-07 14:54:58,881 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:58,881 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:58,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-07 14:54:58,881 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:58,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1097229927, now seen corresponding path program 1 times [2021-10-07 14:54:58,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:58,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360194860] [2021-10-07 14:54:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:58,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:54:58,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:58,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360194860] [2021-10-07 14:54:58,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360194860] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:58,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:58,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-07 14:54:58,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792563300] [2021-10-07 14:54:58,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:54:58,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:54:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:58,931 INFO L87 Difference]: Start difference. First operand 3378 states and 12570 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 14:54:59,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:59,030 INFO L93 Difference]: Finished difference Result 4054 states and 13832 transitions. [2021-10-07 14:54:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:54:59,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 14:54:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:59,049 INFO L225 Difference]: With dead ends: 4054 [2021-10-07 14:54:59,049 INFO L226 Difference]: Without dead ends: 3850 [2021-10-07 14:54:59,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2021-10-07 14:54:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3278. [2021-10-07 14:54:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3252 states have (on average 3.5043050430504303) internal successors, (11396), 3277 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 11396 transitions. [2021-10-07 14:54:59,183 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 11396 transitions. Word has length 9 [2021-10-07 14:54:59,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:59,184 INFO L470 AbstractCegarLoop]: Abstraction has 3278 states and 11396 transitions. [2021-10-07 14:54:59,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 14:54:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 11396 transitions. [2021-10-07 14:54:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 14:54:59,186 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:59,186 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:59,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-07 14:54:59,187 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:59,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1849204847, now seen corresponding path program 1 times [2021-10-07 14:54:59,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:59,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447777833] [2021-10-07 14:54:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:59,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:59,222 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 14:54:59,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:59,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447777833] [2021-10-07 14:54:59,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447777833] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:59,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:59,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-07 14:54:59,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199432389] [2021-10-07 14:54:59,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 14:54:59,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:59,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 14:54:59,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:54:59,226 INFO L87 Difference]: Start difference. First operand 3278 states and 11396 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:59,315 INFO L93 Difference]: Finished difference Result 3932 states and 13102 transitions. [2021-10-07 14:54:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 14:54:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 14:54:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:59,334 INFO L225 Difference]: With dead ends: 3932 [2021-10-07 14:54:59,335 INFO L226 Difference]: Without dead ends: 3888 [2021-10-07 14:54:59,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:54:59,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2021-10-07 14:54:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 2920. [2021-10-07 14:54:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2902 states have (on average 3.5189524465885595) internal successors, (10212), 2919 states have internal predecessors, (10212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 10212 transitions. [2021-10-07 14:54:59,462 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 10212 transitions. Word has length 10 [2021-10-07 14:54:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:59,462 INFO L470 AbstractCegarLoop]: Abstraction has 2920 states and 10212 transitions. [2021-10-07 14:54:59,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 10212 transitions. [2021-10-07 14:54:59,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-07 14:54:59,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:59,464 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:59,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-07 14:54:59,465 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1932401452, now seen corresponding path program 1 times [2021-10-07 14:54:59,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:59,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178175671] [2021-10-07 14:54:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:59,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:59,503 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 14:54:59,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:59,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178175671] [2021-10-07 14:54:59,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178175671] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:59,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:59,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-07 14:54:59,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120455426] [2021-10-07 14:54:59,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:54:59,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:59,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:54:59,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:59,506 INFO L87 Difference]: Start difference. First operand 2920 states and 10212 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:59,608 INFO L93 Difference]: Finished difference Result 3434 states and 11522 transitions. [2021-10-07 14:54:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:54:59,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-07 14:54:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:59,625 INFO L225 Difference]: With dead ends: 3434 [2021-10-07 14:54:59,626 INFO L226 Difference]: Without dead ends: 3360 [2021-10-07 14:54:59,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-10-07 14:54:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2852. [2021-10-07 14:54:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2835 states have (on average 3.4497354497354498) internal successors, (9780), 2851 states have internal predecessors, (9780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 9780 transitions. [2021-10-07 14:54:59,730 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 9780 transitions. Word has length 10 [2021-10-07 14:54:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:59,730 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 9780 transitions. [2021-10-07 14:54:59,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 9780 transitions. [2021-10-07 14:54:59,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-07 14:54:59,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:59,733 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:59,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-07 14:54:59,733 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:59,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1492504548, now seen corresponding path program 1 times [2021-10-07 14:54:59,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:59,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407686715] [2021-10-07 14:54:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:59,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:54:59,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:59,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407686715] [2021-10-07 14:54:59,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407686715] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:59,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:59,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-07 14:54:59,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806041989] [2021-10-07 14:54:59,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:54:59,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:54:59,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:59,789 INFO L87 Difference]: Start difference. First operand 2852 states and 9780 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:54:59,828 INFO L93 Difference]: Finished difference Result 2350 states and 7520 transitions. [2021-10-07 14:54:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:54:59,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-07 14:54:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:54:59,839 INFO L225 Difference]: With dead ends: 2350 [2021-10-07 14:54:59,839 INFO L226 Difference]: Without dead ends: 2208 [2021-10-07 14:54:59,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-10-07 14:54:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2016. [2021-10-07 14:54:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 1999 states have (on average 3.3056528264132066) internal successors, (6608), 2015 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6608 transitions. [2021-10-07 14:54:59,903 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6608 transitions. Word has length 11 [2021-10-07 14:54:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:54:59,903 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 6608 transitions. [2021-10-07 14:54:59,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:54:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6608 transitions. [2021-10-07 14:54:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 14:54:59,905 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:54:59,905 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:54:59,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-07 14:54:59,906 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:54:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:54:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash -193835893, now seen corresponding path program 1 times [2021-10-07 14:54:59,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:54:59,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880526076] [2021-10-07 14:54:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:54:59,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:54:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:54:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-07 14:54:59,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:54:59,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880526076] [2021-10-07 14:54:59,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880526076] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:54:59,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:54:59,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-07 14:54:59,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746479381] [2021-10-07 14:54:59,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-07 14:54:59,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:54:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-07 14:54:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:54:59,941 INFO L87 Difference]: Start difference. First operand 2016 states and 6608 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:00,000 INFO L93 Difference]: Finished difference Result 3098 states and 9912 transitions. [2021-10-07 14:55:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-07 14:55:00,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-07 14:55:00,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:00,014 INFO L225 Difference]: With dead ends: 3098 [2021-10-07 14:55:00,015 INFO L226 Difference]: Without dead ends: 3002 [2021-10-07 14:55:00,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-07 14:55:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-10-07 14:55:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2106. [2021-10-07 14:55:00,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2089 states have (on average 3.341311632359981) internal successors, (6980), 2105 states have internal predecessors, (6980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 6980 transitions. [2021-10-07 14:55:00,121 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 6980 transitions. Word has length 13 [2021-10-07 14:55:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:00,121 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 6980 transitions. [2021-10-07 14:55:00,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 6980 transitions. [2021-10-07 14:55:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-07 14:55:00,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:00,124 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:00,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-07 14:55:00,125 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:55:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1890135433, now seen corresponding path program 2 times [2021-10-07 14:55:00,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:00,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031151981] [2021-10-07 14:55:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:00,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:00,172 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 14:55:00,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:00,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031151981] [2021-10-07 14:55:00,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031151981] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:00,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499126521] [2021-10-07 14:55:00,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-07 14:55:00,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:00,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:00,176 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 14:55:00,205 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 14:55:00,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-07 14:55:00,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-07 14:55:00,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-07 14:55:00,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:00,400 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 14:55:00,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499126521] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:00,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:00,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-07 14:55:00,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083027154] [2021-10-07 14:55:00,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-07 14:55:00,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-07 14:55:00,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-07 14:55:00,403 INFO L87 Difference]: Start difference. First operand 2106 states and 6980 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 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 14:55:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:00,486 INFO L93 Difference]: Finished difference Result 2224 states and 7096 transitions. [2021-10-07 14:55:00,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-07 14:55:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 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 13 [2021-10-07 14:55:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:00,498 INFO L225 Difference]: With dead ends: 2224 [2021-10-07 14:55:00,499 INFO L226 Difference]: Without dead ends: 1964 [2021-10-07 14:55:00,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-07 14:55:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-10-07 14:55:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1058. [2021-10-07 14:55:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1046 states have (on average 3.0994263862332696) internal successors, (3242), 1057 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3242 transitions. [2021-10-07 14:55:00,541 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3242 transitions. Word has length 13 [2021-10-07 14:55:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:00,542 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3242 transitions. [2021-10-07 14:55:00,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 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 14:55:00,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3242 transitions. [2021-10-07 14:55:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 14:55:00,543 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:00,544 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:00,587 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 14:55:00,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:00,758 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:55:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:00,759 INFO L82 PathProgramCache]: Analyzing trace with hash 26842042, now seen corresponding path program 1 times [2021-10-07 14:55:00,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:00,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425555338] [2021-10-07 14:55:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:00,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:55:00,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:00,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425555338] [2021-10-07 14:55:00,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425555338] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:55:00,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:55:00,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-07 14:55:00,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656969108] [2021-10-07 14:55:00,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 14:55:00,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 14:55:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:00,800 INFO L87 Difference]: Start difference. First operand 1058 states and 3242 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:00,857 INFO L93 Difference]: Finished difference Result 1524 states and 4388 transitions. [2021-10-07 14:55:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 14:55:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 14:55:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:00,863 INFO L225 Difference]: With dead ends: 1524 [2021-10-07 14:55:00,864 INFO L226 Difference]: Without dead ends: 1302 [2021-10-07 14:55:00,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-10-07 14:55:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 860. [2021-10-07 14:55:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 849 states have (on average 2.998822143698469) internal successors, (2546), 859 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2546 transitions. [2021-10-07 14:55:00,890 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2546 transitions. Word has length 14 [2021-10-07 14:55:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:00,891 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 2546 transitions. [2021-10-07 14:55:00,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2546 transitions. [2021-10-07 14:55:00,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-07 14:55:00,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:00,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:00,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-07 14:55:00,893 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:55:00,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:00,894 INFO L82 PathProgramCache]: Analyzing trace with hash 25998532, now seen corresponding path program 2 times [2021-10-07 14:55:00,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:00,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097037038] [2021-10-07 14:55:00,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:00,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:55:00,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:00,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097037038] [2021-10-07 14:55:00,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097037038] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:55:00,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:55:00,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-07 14:55:00,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417750001] [2021-10-07 14:55:00,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 14:55:00,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 14:55:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:00,933 INFO L87 Difference]: Start difference. First operand 860 states and 2546 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:00,986 INFO L93 Difference]: Finished difference Result 1272 states and 3732 transitions. [2021-10-07 14:55:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 14:55:00,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-07 14:55:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:00,992 INFO L225 Difference]: With dead ends: 1272 [2021-10-07 14:55:00,992 INFO L226 Difference]: Without dead ends: 1154 [2021-10-07 14:55:00,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-10-07 14:55:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 954. [2021-10-07 14:55:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 943 states have (on average 2.9819724284199363) internal successors, (2812), 953 states have internal predecessors, (2812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 2812 transitions. [2021-10-07 14:55:01,017 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 2812 transitions. Word has length 14 [2021-10-07 14:55:01,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:01,018 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 2812 transitions. [2021-10-07 14:55:01,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 2812 transitions. [2021-10-07 14:55:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-07 14:55:01,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:01,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:01,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-07 14:55:01,020 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:55:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash 808818093, now seen corresponding path program 1 times [2021-10-07 14:55:01,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:01,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474528861] [2021-10-07 14:55:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:01,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:55:01,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:01,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474528861] [2021-10-07 14:55:01,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474528861] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-07 14:55:01,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-07 14:55:01,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-07 14:55:01,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573514194] [2021-10-07 14:55:01,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-07 14:55:01,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:01,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-07 14:55:01,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:01,059 INFO L87 Difference]: Start difference. First operand 954 states and 2812 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 14:55:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:01,120 INFO L93 Difference]: Finished difference Result 1762 states and 5142 transitions. [2021-10-07 14:55:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-07 14:55:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-07 14:55:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:01,128 INFO L225 Difference]: With dead ends: 1762 [2021-10-07 14:55:01,128 INFO L226 Difference]: Without dead ends: 1640 [2021-10-07 14:55:01,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-07 14:55:01,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-10-07 14:55:01,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1188. [2021-10-07 14:55:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1177 states have (on average 3.005947323704333) internal successors, (3538), 1187 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3538 transitions. [2021-10-07 14:55:01,184 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3538 transitions. Word has length 15 [2021-10-07 14:55:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:01,185 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 3538 transitions. [2021-10-07 14:55:01,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 14:55:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3538 transitions. [2021-10-07 14:55:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-07 14:55:01,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-07 14:55:01,187 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-07 14:55:01,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-07 14:55:01,188 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-07 14:55:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-07 14:55:01,188 INFO L82 PathProgramCache]: Analyzing trace with hash 756098566, now seen corresponding path program 1 times [2021-10-07 14:55:01,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-07 14:55:01,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262468106] [2021-10-07 14:55:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:01,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-07 14:55:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:55:01,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-07 14:55:01,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262468106] [2021-10-07 14:55:01,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262468106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:01,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888904006] [2021-10-07 14:55:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-07 14:55:01,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:01,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-07 14:55:01,241 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 14:55:01,262 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 14:55:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-07 14:55:01,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-07 14:55:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-07 14:55:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-07 14:55:01,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888904006] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-07 14:55:01,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-07 14:55:01,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-07 14:55:01,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447977712] [2021-10-07 14:55:01,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-07 14:55:01,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-07 14:55:01,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-07 14:55:01,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-07 14:55:01,368 INFO L87 Difference]: Start difference. First operand 1188 states and 3538 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-07 14:55:01,426 INFO L93 Difference]: Finished difference Result 994 states and 2978 transitions. [2021-10-07 14:55:01,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-07 14:55:01,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-07 14:55:01,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-07 14:55:01,427 INFO L225 Difference]: With dead ends: 994 [2021-10-07 14:55:01,427 INFO L226 Difference]: Without dead ends: 0 [2021-10-07 14:55:01,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-07 14:55:01,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-07 14:55:01,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-07 14:55:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:01,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-07 14:55:01,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-07 14:55:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-07 14:55:01,429 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-07 14:55:01,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-07 14:55:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-07 14:55:01,429 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-07 14:55:01,432 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,433 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,433 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,434 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,434 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,434 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,434 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,434 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,435 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-07 14:55:01,435 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-07 14:55:01,435 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-07 14:55:01,435 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,436 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,436 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,436 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,436 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,437 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,437 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,437 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-07 14:55:01,479 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 14:55:01,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-07 14:55:01,649 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-07 14:55:01,649 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-07 14:55:01,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.10 02:55:01 BasicIcfg [2021-10-07 14:55:01,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-07 14:55:01,652 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-07 14:55:01,652 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-07 14:55:01,652 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-07 14:55:01,653 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 02:54:51" (3/4) ... [2021-10-07 14:55:01,656 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-07 14:55:01,663 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-07 14:55:01,663 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-07 14:55:01,663 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-07 14:55:01,668 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-07 14:55:01,668 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-07 14:55:01,669 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-07 14:55:01,669 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-07 14:55:01,711 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/weaver/parallel-misc-4.wvr.c-witness.graphml [2021-10-07 14:55:01,711 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-07 14:55:01,713 INFO L168 Benchmark]: Toolchain (without parser) took 11473.90 ms. Allocated memory was 161.5 MB in the beginning and 299.9 MB in the end (delta: 138.4 MB). Free memory was 136.6 MB in the beginning and 234.9 MB in the end (delta: -98.3 MB). Peak memory consumption was 40.4 MB. Max. memory is 8.0 GB. [2021-10-07 14:55:01,714 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 161.5 MB. Free memory is still 131.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-07 14:55:01,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 397.11 ms. Allocated memory is still 161.5 MB. Free memory was 136.2 MB in the beginning and 126.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-07 14:55:01,714 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.34 ms. Allocated memory is still 161.5 MB. Free memory was 125.8 MB in the beginning and 124.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-07 14:55:01,715 INFO L168 Benchmark]: Boogie Preprocessor took 29.99 ms. Allocated memory is still 161.5 MB. Free memory was 124.3 MB in the beginning and 123.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 14:55:01,715 INFO L168 Benchmark]: RCFGBuilder took 640.35 ms. Allocated memory is still 161.5 MB. Free memory was 123.1 MB in the beginning and 144.0 MB in the end (delta: -20.9 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. [2021-10-07 14:55:01,716 INFO L168 Benchmark]: TraceAbstraction took 10283.13 ms. Allocated memory was 161.5 MB in the beginning and 299.9 MB in the end (delta: 138.4 MB). Free memory was 143.5 MB in the beginning and 237.5 MB in the end (delta: -94.0 MB). Peak memory consumption was 44.4 MB. Max. memory is 8.0 GB. [2021-10-07 14:55:01,716 INFO L168 Benchmark]: Witness Printer took 59.42 ms. Allocated memory is still 299.9 MB. Free memory was 237.5 MB in the beginning and 234.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-07 14:55:01,718 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 161.5 MB. Free memory is still 131.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 397.11 ms. Allocated memory is still 161.5 MB. Free memory was 136.2 MB in the beginning and 126.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.34 ms. Allocated memory is still 161.5 MB. Free memory was 125.8 MB in the beginning and 124.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.99 ms. Allocated memory is still 161.5 MB. Free memory was 124.3 MB in the beginning and 123.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 640.35 ms. Allocated memory is still 161.5 MB. Free memory was 123.1 MB in the beginning and 144.0 MB in the end (delta: -20.9 MB). Peak memory consumption was 19.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10283.13 ms. Allocated memory was 161.5 MB in the beginning and 299.9 MB in the end (delta: 138.4 MB). Free memory was 143.5 MB in the beginning and 237.5 MB in the end (delta: -94.0 MB). Peak memory consumption was 44.4 MB. Max. memory is 8.0 GB. * Witness Printer took 59.42 ms. Allocated memory is still 299.9 MB. Free memory was 237.5 MB in the beginning and 234.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4327.9ms, 109 PlacesBefore, 44 PlacesAfterwards, 106 TransitionsBefore, 38 TransitionsAfterwards, 1602 CoEnabledTransitionPairs, 6 FixpointIterations, 42 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 7 ConcurrentYvCompositions, 3 ChoiceCompositions, 88 TotalNumberOfCompositions, 4962 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3605, positive: 3440, positive conditional: 0, positive unconditional: 3440, negative: 165, negative conditional: 0, negative unconditional: 165, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1184, positive: 1149, positive conditional: 0, positive unconditional: 1149, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1184, positive: 1133, positive conditional: 0, positive unconditional: 1133, negative: 51, negative conditional: 0, negative unconditional: 51, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 51, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 136, positive: 45, positive conditional: 0, positive unconditional: 45, negative: 91, negative conditional: 0, negative unconditional: 91, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 3605, positive: 2291, positive conditional: 0, positive unconditional: 2291, negative: 130, negative conditional: 0, negative unconditional: 130, unknown: 1184, unknown conditional: 0, unknown unconditional: 1184] , Statistics on independence cache: Total cache size (in pairs): 260, Positive cache size: 239, Positive conditional cache size: 0, Positive unconditional cache size: 239, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 45]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 50]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 50]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 62]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 66]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 62]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 66]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 135 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 10069.6ms, OverallIterations: 19, TraceHistogramMax: 2, EmptinessCheckTime: 46.1ms, AutomataDifference: 1832.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4435.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 492 SDtfs, 962 SDslu, 603 SDs, 0 SdLazy, 529 SolverSat, 271 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 655.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 114.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3378occurred in iteration=9, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1635.5ms AutomataMinimizationTime, 19 MinimizatonAttempts, 9846 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 59.2ms SsaConstructionTime, 350.3ms SatisfiabilityAnalysisTime, 845.9ms InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 544 SizeOfPredicates, 5 NumberOfNonLiveVariables, 204 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 21 InterpolantComputations, 17 PerfectInterpolantSequences, 32/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-07 14:55:01,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...