/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 [2021-10-08 15:52:06,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 15:52:06,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 15:52:06,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-10-08 15:52:06,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 15:52:06,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 15:52:06,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 15:52:06,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-10-08 15:52:06,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 15:52:06,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 15:52:06,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 15:52:06,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 15:52:06,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 15:52:06,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 15:52:06,938 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 15:52:06,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 15:52:06,939 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 15:52:06,939 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-08 15:52:06,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 15:52:06,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 15:52:06,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 15:52:06,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-08 15:52:06,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 15:52:06,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-08 15:52:06,941 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-08 15:52:06,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 15:52:06,941 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-08 15:52:06,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 15:52:06,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-08 15:52:06,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 15:52:06,942 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 15:52:06,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 15:52:06,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 15:52:06,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 15:52:06,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 15:52:06,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-08 15:52:06,943 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-08 15:52:06,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-08 15:52:06,944 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-08 15:52:06,944 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 15:52:06,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-10-08 15:52:07,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 15:52:07,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 15:52:07,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 15:52:07,380 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 15:52:07,381 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 15:52:07,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2021-10-08 15:52:07,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8452d79ee/af00f5bdf9cb4c74b29422117dac276b/FLAGa4f0e9932 [2021-10-08 15:52:08,233 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 15:52:08,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2021-10-08 15:52:08,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8452d79ee/af00f5bdf9cb4c74b29422117dac276b/FLAGa4f0e9932 [2021-10-08 15:52:08,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8452d79ee/af00f5bdf9cb4c74b29422117dac276b [2021-10-08 15:52:08,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 15:52:08,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-08 15:52:08,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 15:52:08,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 15:52:08,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 15:52:08,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6234f11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08, skipping insertion in model container [2021-10-08 15:52:08,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 15:52:08,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 15:52:08,812 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] [2021-10-08 15:52:08,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 15:52:08,824 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 15:52:08,849 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] [2021-10-08 15:52:08,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 15:52:08,869 INFO L208 MainTranslator]: Completed translation [2021-10-08 15:52:08,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08 WrapperNode [2021-10-08 15:52:08,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 15:52:08,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 15:52:08,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 15:52:08,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 15:52:08,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 15:52:08,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 15:52:08,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 15:52:08,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 15:52:08,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:08,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:09,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 15:52:09,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 15:52:09,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 15:52:09,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 15:52:09,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (1/1) ... [2021-10-08 15:52:09,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 15:52:09,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:09,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 15:52:09,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 15:52:09,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 15:52:09,127 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 15:52:09,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 15:52:09,127 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 15:52:09,127 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 15:52:09,128 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 15:52:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-08 15:52:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 15:52:09,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-08 15:52:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 15:52:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 15:52:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 15:52:09,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 15:52:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-08 15:52:09,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 15:52:09,132 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 15:52:09,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 15:52:09,697 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-08 15:52:09,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 03:52:09 BoogieIcfgContainer [2021-10-08 15:52:09,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 15:52:09,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 15:52:09,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 15:52:09,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 15:52:09,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 03:52:08" (1/3) ... [2021-10-08 15:52:09,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cdde3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 03:52:09, skipping insertion in model container [2021-10-08 15:52:09,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 03:52:08" (2/3) ... [2021-10-08 15:52:09,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cdde3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 03:52:09, skipping insertion in model container [2021-10-08 15:52:09,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 03:52:09" (3/3) ... [2021-10-08 15:52:09,716 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2021-10-08 15:52:09,724 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-08 15:52:09,724 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 15:52:09,724 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-08 15:52:09,725 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 15:52:09,788 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,788 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,789 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,789 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,790 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,790 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,791 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,791 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,791 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,791 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,792 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,792 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,792 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,793 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,793 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,794 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,797 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,797 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,797 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,798 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,803 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,804 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,804 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,804 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,815 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,817 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,825 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,825 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,837 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,838 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,838 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,838 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 15:52:09,857 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-08 15:52:09,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 15:52:09,953 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-08 15:52:09,953 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-08 15:52:09,985 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 15:52:09,999 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 106 transitions, 236 flow [2021-10-08 15:52:10,003 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 106 transitions, 236 flow [2021-10-08 15:52:10,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 109 places, 106 transitions, 236 flow [2021-10-08 15:52:10,095 INFO L129 PetriNetUnfolder]: 7/103 cut-off events. [2021-10-08 15:52:10,097 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-08 15:52:10,106 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. [2021-10-08 15:52:10,112 INFO L116 LiptonReduction]: Number of co-enabled transitions 1602 [2021-10-08 15:52:14,358 INFO L131 LiptonReduction]: Checked pairs total: 4962 [2021-10-08 15:52:14,358 INFO L133 LiptonReduction]: Total number of compositions: 88 [2021-10-08 15:52:14,370 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 38 transitions, 100 flow [2021-10-08 15:52:14,431 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) [2021-10-08 15:52:14,437 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) [2021-10-08 15:52:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 15:52:14,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:14,444 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 15:52:14,445 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:14,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:14,451 INFO L82 PathProgramCache]: Analyzing trace with hash 12776196, now seen corresponding path program 1 times [2021-10-08 15:52:14,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:14,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092803309] [2021-10-08 15:52:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:14,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:14,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:14,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092803309] [2021-10-08 15:52:14,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092803309] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:14,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:14,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-08 15:52:14,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210404410] [2021-10-08 15:52:14,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:52:14,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:52:14,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:52:14,731 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) [2021-10-08 15:52:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:14,852 INFO L93 Difference]: Finished difference Result 986 states and 3064 transitions. [2021-10-08 15:52:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:52:14,854 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 [2021-10-08 15:52:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:14,891 INFO L225 Difference]: With dead ends: 986 [2021-10-08 15:52:14,891 INFO L226 Difference]: Without dead ends: 982 [2021-10-08 15:52:14,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:52:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-10-08 15:52:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 856. [2021-10-08 15:52:15,008 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) [2021-10-08 15:52:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2870 transitions. [2021-10-08 15:52:15,025 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2870 transitions. Word has length 4 [2021-10-08 15:52:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:15,026 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 2870 transitions. [2021-10-08 15:52:15,026 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) [2021-10-08 15:52:15,027 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2870 transitions. [2021-10-08 15:52:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-08 15:52:15,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:15,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-08 15:52:15,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-08 15:52:15,030 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:15,034 INFO L82 PathProgramCache]: Analyzing trace with hash 12776197, now seen corresponding path program 1 times [2021-10-08 15:52:15,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:15,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642407116] [2021-10-08 15:52:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:15,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:15,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:15,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642407116] [2021-10-08 15:52:15,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642407116] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:15,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:15,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-08 15:52:15,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165975446] [2021-10-08 15:52:15,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:52:15,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:15,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:52:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:52:15,163 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) [2021-10-08 15:52:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:15,235 INFO L93 Difference]: Finished difference Result 1430 states and 4686 transitions. [2021-10-08 15:52:15,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:52:15,236 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 [2021-10-08 15:52:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:15,252 INFO L225 Difference]: With dead ends: 1430 [2021-10-08 15:52:15,252 INFO L226 Difference]: Without dead ends: 1424 [2021-10-08 15:52:15,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:52:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-10-08 15:52:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1276. [2021-10-08 15:52:15,335 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) [2021-10-08 15:52:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 4432 transitions. [2021-10-08 15:52:15,345 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 4432 transitions. Word has length 4 [2021-10-08 15:52:15,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:15,345 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 4432 transitions. [2021-10-08 15:52:15,346 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) [2021-10-08 15:52:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 4432 transitions. [2021-10-08 15:52:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 15:52:15,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:15,347 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 15:52:15,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-08 15:52:15,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash -604127505, now seen corresponding path program 1 times [2021-10-08 15:52:15,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:15,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837963755] [2021-10-08 15:52:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:15,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:15,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:15,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837963755] [2021-10-08 15:52:15,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837963755] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:15,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:15,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 15:52:15,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430995954] [2021-10-08 15:52:15,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:15,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:15,445 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) [2021-10-08 15:52:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:15,497 INFO L93 Difference]: Finished difference Result 1578 states and 5118 transitions. [2021-10-08 15:52:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:15,497 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 [2021-10-08 15:52:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:15,513 INFO L225 Difference]: With dead ends: 1578 [2021-10-08 15:52:15,514 INFO L226 Difference]: Without dead ends: 1578 [2021-10-08 15:52:15,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-10-08 15:52:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1446. [2021-10-08 15:52:15,568 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) [2021-10-08 15:52:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4790 transitions. [2021-10-08 15:52:15,579 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4790 transitions. Word has length 6 [2021-10-08 15:52:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:15,579 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4790 transitions. [2021-10-08 15:52:15,579 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) [2021-10-08 15:52:15,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4790 transitions. [2021-10-08 15:52:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-08 15:52:15,580 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:15,581 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-08 15:52:15,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-08 15:52:15,581 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:15,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:15,582 INFO L82 PathProgramCache]: Analyzing trace with hash -604127511, now seen corresponding path program 1 times [2021-10-08 15:52:15,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:15,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785957170] [2021-10-08 15:52:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:15,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:15,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:15,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785957170] [2021-10-08 15:52:15,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785957170] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:15,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:15,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:52:15,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763502422] [2021-10-08 15:52:15,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:52:15,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:52:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:52:15,641 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) [2021-10-08 15:52:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:15,705 INFO L93 Difference]: Finished difference Result 1948 states and 6438 transitions. [2021-10-08 15:52:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:52:15,705 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 [2021-10-08 15:52:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:15,724 INFO L225 Difference]: With dead ends: 1948 [2021-10-08 15:52:15,724 INFO L226 Difference]: Without dead ends: 1942 [2021-10-08 15:52:15,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:52:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-10-08 15:52:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1734. [2021-10-08 15:52:15,816 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) [2021-10-08 15:52:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5936 transitions. [2021-10-08 15:52:15,829 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5936 transitions. Word has length 6 [2021-10-08 15:52:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:15,830 INFO L470 AbstractCegarLoop]: Abstraction has 1734 states and 5936 transitions. [2021-10-08 15:52:15,830 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) [2021-10-08 15:52:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5936 transitions. [2021-10-08 15:52:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 15:52:15,832 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:15,832 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:15,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-08 15:52:15,833 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:15,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:15,835 INFO L82 PathProgramCache]: Analyzing trace with hash -672936248, now seen corresponding path program 1 times [2021-10-08 15:52:15,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:15,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750864496] [2021-10-08 15:52:15,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:15,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:15,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:15,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750864496] [2021-10-08 15:52:15,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750864496] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:15,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:15,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:52:15,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983452856] [2021-10-08 15:52:15,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:15,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:15,944 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) [2021-10-08 15:52:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:16,028 INFO L93 Difference]: Finished difference Result 2390 states and 8116 transitions. [2021-10-08 15:52:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:16,029 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 [2021-10-08 15:52:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:16,052 INFO L225 Difference]: With dead ends: 2390 [2021-10-08 15:52:16,053 INFO L226 Difference]: Without dead ends: 2390 [2021-10-08 15:52:16,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:16,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-10-08 15:52:16,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1886. [2021-10-08 15:52:16,131 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) [2021-10-08 15:52:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6560 transitions. [2021-10-08 15:52:16,145 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6560 transitions. Word has length 8 [2021-10-08 15:52:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:16,146 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 6560 transitions. [2021-10-08 15:52:16,146 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) [2021-10-08 15:52:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6560 transitions. [2021-10-08 15:52:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 15:52:16,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:16,148 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:16,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-08 15:52:16,149 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -743068487, now seen corresponding path program 1 times [2021-10-08 15:52:16,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:16,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675690076] [2021-10-08 15:52:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:16,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:52:16,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:16,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675690076] [2021-10-08 15:52:16,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675690076] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:16,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:16,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:52:16,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959248872] [2021-10-08 15:52:16,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 15:52:16,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:16,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 15:52:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 15:52:16,187 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) [2021-10-08 15:52:16,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:16,261 INFO L93 Difference]: Finished difference Result 2678 states and 9366 transitions. [2021-10-08 15:52:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 15:52:16,261 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 [2021-10-08 15:52:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:16,289 INFO L225 Difference]: With dead ends: 2678 [2021-10-08 15:52:16,289 INFO L226 Difference]: Without dead ends: 2672 [2021-10-08 15:52:16,290 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 [2021-10-08 15:52:16,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-10-08 15:52:16,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2148. [2021-10-08 15:52:16,422 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) [2021-10-08 15:52:16,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 7820 transitions. [2021-10-08 15:52:16,438 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 7820 transitions. Word has length 8 [2021-10-08 15:52:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:16,438 INFO L470 AbstractCegarLoop]: Abstraction has 2148 states and 7820 transitions. [2021-10-08 15:52:16,439 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) [2021-10-08 15:52:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 7820 transitions. [2021-10-08 15:52:16,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 15:52:16,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:16,440 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:16,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-08 15:52:16,441 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:16,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:16,442 INFO L82 PathProgramCache]: Analyzing trace with hash -38090996, now seen corresponding path program 1 times [2021-10-08 15:52:16,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:16,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649248895] [2021-10-08 15:52:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:16,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:16,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:16,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649248895] [2021-10-08 15:52:16,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649248895] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:16,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:16,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 15:52:16,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952959150] [2021-10-08 15:52:16,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:16,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:16,486 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) [2021-10-08 15:52:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:16,593 INFO L93 Difference]: Finished difference Result 3584 states and 12466 transitions. [2021-10-08 15:52:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:16,594 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 [2021-10-08 15:52:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:16,636 INFO L225 Difference]: With dead ends: 3584 [2021-10-08 15:52:16,636 INFO L226 Difference]: Without dead ends: 3572 [2021-10-08 15:52:16,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-10-08 15:52:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2272. [2021-10-08 15:52:16,737 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) [2021-10-08 15:52:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 8244 transitions. [2021-10-08 15:52:16,753 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 8244 transitions. Word has length 8 [2021-10-08 15:52:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:16,754 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 8244 transitions. [2021-10-08 15:52:16,754 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) [2021-10-08 15:52:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 8244 transitions. [2021-10-08 15:52:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-08 15:52:16,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:16,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:16,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-08 15:52:16,756 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:16,757 INFO L82 PathProgramCache]: Analyzing trace with hash -35394509, now seen corresponding path program 1 times [2021-10-08 15:52:16,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:16,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765842376] [2021-10-08 15:52:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:16,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:16,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:16,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765842376] [2021-10-08 15:52:16,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765842376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:16,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:16,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 15:52:16,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077999879] [2021-10-08 15:52:16,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:16,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:16,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:16,790 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) [2021-10-08 15:52:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:16,886 INFO L93 Difference]: Finished difference Result 3316 states and 11462 transitions. [2021-10-08 15:52:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:16,887 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 [2021-10-08 15:52:16,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:16,907 INFO L225 Difference]: With dead ends: 3316 [2021-10-08 15:52:16,907 INFO L226 Difference]: Without dead ends: 3304 [2021-10-08 15:52:16,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-10-08 15:52:17,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2288. [2021-10-08 15:52:17,033 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) [2021-10-08 15:52:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8154 transitions. [2021-10-08 15:52:17,048 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8154 transitions. Word has length 8 [2021-10-08 15:52:17,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:17,048 INFO L470 AbstractCegarLoop]: Abstraction has 2288 states and 8154 transitions. [2021-10-08 15:52:17,048 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) [2021-10-08 15:52:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8154 transitions. [2021-10-08 15:52:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 15:52:17,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:17,050 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:17,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-08 15:52:17,050 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1312835479, now seen corresponding path program 1 times [2021-10-08 15:52:17,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:17,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042479355] [2021-10-08 15:52:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:17,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:17,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:17,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042479355] [2021-10-08 15:52:17,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042479355] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:17,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:17,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:52:17,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690338555] [2021-10-08 15:52:17,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:17,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:17,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:17,092 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) [2021-10-08 15:52:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:17,200 INFO L93 Difference]: Finished difference Result 4136 states and 14566 transitions. [2021-10-08 15:52:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:17,201 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 [2021-10-08 15:52:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:17,235 INFO L225 Difference]: With dead ends: 4136 [2021-10-08 15:52:17,236 INFO L226 Difference]: Without dead ends: 4130 [2021-10-08 15:52:17,236 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 [2021-10-08 15:52:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4130 states. [2021-10-08 15:52:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4130 to 3378. [2021-10-08 15:52:17,405 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) [2021-10-08 15:52:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 12570 transitions. [2021-10-08 15:52:17,478 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 12570 transitions. Word has length 9 [2021-10-08 15:52:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:17,479 INFO L470 AbstractCegarLoop]: Abstraction has 3378 states and 12570 transitions. [2021-10-08 15:52:17,480 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) [2021-10-08 15:52:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 12570 transitions. [2021-10-08 15:52:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-08 15:52:17,482 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:17,482 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:17,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-08 15:52:17,483 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1097229927, now seen corresponding path program 1 times [2021-10-08 15:52:17,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:17,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757497411] [2021-10-08 15:52:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:17,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:17,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:17,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757497411] [2021-10-08 15:52:17,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757497411] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:17,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:17,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-08 15:52:17,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675336911] [2021-10-08 15:52:17,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:17,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:17,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:17,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:17,541 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) [2021-10-08 15:52:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:17,622 INFO L93 Difference]: Finished difference Result 4054 states and 13832 transitions. [2021-10-08 15:52:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:17,623 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 [2021-10-08 15:52:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:17,646 INFO L225 Difference]: With dead ends: 4054 [2021-10-08 15:52:17,646 INFO L226 Difference]: Without dead ends: 3850 [2021-10-08 15:52:17,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3850 states. [2021-10-08 15:52:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3850 to 3278. [2021-10-08 15:52:17,783 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) [2021-10-08 15:52:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 11396 transitions. [2021-10-08 15:52:17,806 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 11396 transitions. Word has length 9 [2021-10-08 15:52:17,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:17,807 INFO L470 AbstractCegarLoop]: Abstraction has 3278 states and 11396 transitions. [2021-10-08 15:52:17,807 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) [2021-10-08 15:52:17,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 11396 transitions. [2021-10-08 15:52:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 15:52:17,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:17,809 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:17,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-08 15:52:17,809 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:17,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:17,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1849204847, now seen corresponding path program 1 times [2021-10-08 15:52:17,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:17,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370934668] [2021-10-08 15:52:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:17,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:17,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:17,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370934668] [2021-10-08 15:52:17,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370934668] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:17,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:17,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-08 15:52:17,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062940419] [2021-10-08 15:52:17,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:52:17,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:17,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:52:17,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:17,849 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) [2021-10-08 15:52:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:17,946 INFO L93 Difference]: Finished difference Result 3932 states and 13102 transitions. [2021-10-08 15:52:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:52:17,946 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 [2021-10-08 15:52:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:17,967 INFO L225 Difference]: With dead ends: 3932 [2021-10-08 15:52:17,967 INFO L226 Difference]: Without dead ends: 3888 [2021-10-08 15:52:17,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3888 states. [2021-10-08 15:52:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3888 to 2920. [2021-10-08 15:52:18,187 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) [2021-10-08 15:52:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 10212 transitions. [2021-10-08 15:52:18,204 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 10212 transitions. Word has length 10 [2021-10-08 15:52:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:18,205 INFO L470 AbstractCegarLoop]: Abstraction has 2920 states and 10212 transitions. [2021-10-08 15:52:18,205 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) [2021-10-08 15:52:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 10212 transitions. [2021-10-08 15:52:18,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-08 15:52:18,207 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:18,207 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:18,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-08 15:52:18,208 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1932401452, now seen corresponding path program 1 times [2021-10-08 15:52:18,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:18,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942246324] [2021-10-08 15:52:18,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:18,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:18,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:18,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942246324] [2021-10-08 15:52:18,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942246324] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:18,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:18,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 15:52:18,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544410836] [2021-10-08 15:52:18,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:18,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:18,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:18,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:18,254 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) [2021-10-08 15:52:18,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:18,324 INFO L93 Difference]: Finished difference Result 3434 states and 11522 transitions. [2021-10-08 15:52:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:18,325 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 [2021-10-08 15:52:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:18,342 INFO L225 Difference]: With dead ends: 3434 [2021-10-08 15:52:18,342 INFO L226 Difference]: Without dead ends: 3360 [2021-10-08 15:52:18,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-10-08 15:52:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2852. [2021-10-08 15:52:18,441 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) [2021-10-08 15:52:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 9780 transitions. [2021-10-08 15:52:18,457 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 9780 transitions. Word has length 10 [2021-10-08 15:52:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:18,457 INFO L470 AbstractCegarLoop]: Abstraction has 2852 states and 9780 transitions. [2021-10-08 15:52:18,458 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) [2021-10-08 15:52:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 9780 transitions. [2021-10-08 15:52:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-08 15:52:18,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:18,460 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:18,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-08 15:52:18,460 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1492504548, now seen corresponding path program 1 times [2021-10-08 15:52:18,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:18,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739415188] [2021-10-08 15:52:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:18,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:18,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:18,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739415188] [2021-10-08 15:52:18,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739415188] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:18,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:18,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 15:52:18,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269559403] [2021-10-08 15:52:18,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:18,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:18,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:18,566 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) [2021-10-08 15:52:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:18,658 INFO L93 Difference]: Finished difference Result 2350 states and 7520 transitions. [2021-10-08 15:52:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:18,658 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 [2021-10-08 15:52:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:18,669 INFO L225 Difference]: With dead ends: 2350 [2021-10-08 15:52:18,669 INFO L226 Difference]: Without dead ends: 2208 [2021-10-08 15:52:18,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:18,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-10-08 15:52:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2016. [2021-10-08 15:52:18,728 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) [2021-10-08 15:52:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 6608 transitions. [2021-10-08 15:52:18,737 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 6608 transitions. Word has length 11 [2021-10-08 15:52:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:18,737 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 6608 transitions. [2021-10-08 15:52:18,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 6608 transitions. [2021-10-08 15:52:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 15:52:18,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:18,740 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:18,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-08 15:52:18,740 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:18,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:18,741 INFO L82 PathProgramCache]: Analyzing trace with hash -193835893, now seen corresponding path program 1 times [2021-10-08 15:52:18,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:18,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288211620] [2021-10-08 15:52:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:18,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:18,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:18,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288211620] [2021-10-08 15:52:18,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288211620] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:18,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:18,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 15:52:18,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572685588] [2021-10-08 15:52:18,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 15:52:18,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 15:52:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:18,774 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) [2021-10-08 15:52:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:18,851 INFO L93 Difference]: Finished difference Result 3098 states and 9912 transitions. [2021-10-08 15:52:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 15:52:18,852 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 [2021-10-08 15:52:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:18,866 INFO L225 Difference]: With dead ends: 3098 [2021-10-08 15:52:18,866 INFO L226 Difference]: Without dead ends: 3002 [2021-10-08 15:52:18,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 15:52:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-10-08 15:52:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2106. [2021-10-08 15:52:18,942 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) [2021-10-08 15:52:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 6980 transitions. [2021-10-08 15:52:18,953 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 6980 transitions. Word has length 13 [2021-10-08 15:52:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:18,953 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 6980 transitions. [2021-10-08 15:52:18,953 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) [2021-10-08 15:52:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 6980 transitions. [2021-10-08 15:52:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-08 15:52:18,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:18,956 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:18,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-08 15:52:18,956 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:18,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1890135433, now seen corresponding path program 2 times [2021-10-08 15:52:18,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:18,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558127686] [2021-10-08 15:52:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:18,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:19,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:19,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558127686] [2021-10-08 15:52:19,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558127686] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:19,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772860980] [2021-10-08 15:52:19,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 15:52:19,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:19,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:19,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 15:52:19,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-08 15:52:19,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 15:52:19,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 15:52:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 15:52:19,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 15:52:19,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772860980] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:19,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:19,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-08 15:52:19,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931550797] [2021-10-08 15:52:19,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-08 15:52:19,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-08 15:52:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-08 15:52:19,306 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) [2021-10-08 15:52:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:19,427 INFO L93 Difference]: Finished difference Result 2224 states and 7096 transitions. [2021-10-08 15:52:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 15:52:19,428 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 [2021-10-08 15:52:19,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:19,447 INFO L225 Difference]: With dead ends: 2224 [2021-10-08 15:52:19,447 INFO L226 Difference]: Without dead ends: 1964 [2021-10-08 15:52:19,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-08 15:52:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-10-08 15:52:19,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1058. [2021-10-08 15:52:19,493 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) [2021-10-08 15:52:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3242 transitions. [2021-10-08 15:52:19,498 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3242 transitions. Word has length 13 [2021-10-08 15:52:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:19,498 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3242 transitions. [2021-10-08 15:52:19,499 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) [2021-10-08 15:52:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3242 transitions. [2021-10-08 15:52:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 15:52:19,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:19,500 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:19,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-08 15:52:19,713 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 [2021-10-08 15:52:19,714 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 26842042, now seen corresponding path program 1 times [2021-10-08 15:52:19,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:19,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150547031] [2021-10-08 15:52:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:19,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:52:19,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:19,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150547031] [2021-10-08 15:52:19,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150547031] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:19,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:19,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-08 15:52:19,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923821956] [2021-10-08 15:52:19,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:52:19,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:52:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:19,766 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) [2021-10-08 15:52:19,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:19,819 INFO L93 Difference]: Finished difference Result 1524 states and 4388 transitions. [2021-10-08 15:52:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:52:19,820 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 [2021-10-08 15:52:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:19,825 INFO L225 Difference]: With dead ends: 1524 [2021-10-08 15:52:19,825 INFO L226 Difference]: Without dead ends: 1302 [2021-10-08 15:52:19,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:19,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-10-08 15:52:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 860. [2021-10-08 15:52:19,851 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) [2021-10-08 15:52:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2546 transitions. [2021-10-08 15:52:19,854 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2546 transitions. Word has length 14 [2021-10-08 15:52:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:19,855 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 2546 transitions. [2021-10-08 15:52:19,855 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) [2021-10-08 15:52:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2546 transitions. [2021-10-08 15:52:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-08 15:52:19,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:19,856 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:19,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-08 15:52:19,857 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash 25998532, now seen corresponding path program 2 times [2021-10-08 15:52:19,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:19,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268461241] [2021-10-08 15:52:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:19,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:52:19,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:19,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268461241] [2021-10-08 15:52:19,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268461241] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:19,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:19,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-08 15:52:19,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426781043] [2021-10-08 15:52:19,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:52:19,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:19,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:52:19,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:19,893 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) [2021-10-08 15:52:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:19,942 INFO L93 Difference]: Finished difference Result 1272 states and 3732 transitions. [2021-10-08 15:52:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:52:19,943 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 [2021-10-08 15:52:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:19,947 INFO L225 Difference]: With dead ends: 1272 [2021-10-08 15:52:19,947 INFO L226 Difference]: Without dead ends: 1154 [2021-10-08 15:52:19,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-10-08 15:52:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 954. [2021-10-08 15:52:19,973 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) [2021-10-08 15:52:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 2812 transitions. [2021-10-08 15:52:19,977 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 2812 transitions. Word has length 14 [2021-10-08 15:52:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:19,977 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 2812 transitions. [2021-10-08 15:52:19,977 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) [2021-10-08 15:52:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 2812 transitions. [2021-10-08 15:52:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-08 15:52:19,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:19,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:19,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-08 15:52:19,979 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:19,979 INFO L82 PathProgramCache]: Analyzing trace with hash 808818093, now seen corresponding path program 1 times [2021-10-08 15:52:19,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:19,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001419997] [2021-10-08 15:52:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:19,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:52:20,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:20,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001419997] [2021-10-08 15:52:20,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001419997] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 15:52:20,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 15:52:20,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-08 15:52:20,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154597280] [2021-10-08 15:52:20,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 15:52:20,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:20,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 15:52:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:20,018 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) [2021-10-08 15:52:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:20,092 INFO L93 Difference]: Finished difference Result 1762 states and 5142 transitions. [2021-10-08 15:52:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-08 15:52:20,092 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 [2021-10-08 15:52:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:20,100 INFO L225 Difference]: With dead ends: 1762 [2021-10-08 15:52:20,100 INFO L226 Difference]: Without dead ends: 1640 [2021-10-08 15:52:20,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-08 15:52:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-10-08 15:52:20,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1188. [2021-10-08 15:52:20,141 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) [2021-10-08 15:52:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3538 transitions. [2021-10-08 15:52:20,147 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3538 transitions. Word has length 15 [2021-10-08 15:52:20,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:20,148 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 3538 transitions. [2021-10-08 15:52:20,148 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) [2021-10-08 15:52:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3538 transitions. [2021-10-08 15:52:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-08 15:52:20,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 15:52:20,150 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 15:52:20,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-08 15:52:20,151 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2021-10-08 15:52:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 15:52:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash 756098566, now seen corresponding path program 1 times [2021-10-08 15:52:20,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 15:52:20,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28840283] [2021-10-08 15:52:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:20,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 15:52:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:52:20,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 15:52:20,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28840283] [2021-10-08 15:52:20,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28840283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:20,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128283183] [2021-10-08 15:52:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 15:52:20,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 15:52:20,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 15:52:20,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 15:52:20,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-08 15:52:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 15:52:20,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-08 15:52:20,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 15:52:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 15:52:20,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128283183] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 15:52:20,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 15:52:20,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-08 15:52:20,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536171754] [2021-10-08 15:52:20,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 15:52:20,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 15:52:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 15:52:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-08 15:52:20,350 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) [2021-10-08 15:52:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 15:52:20,408 INFO L93 Difference]: Finished difference Result 994 states and 2978 transitions. [2021-10-08 15:52:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-08 15:52:20,409 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 [2021-10-08 15:52:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 15:52:20,409 INFO L225 Difference]: With dead ends: 994 [2021-10-08 15:52:20,409 INFO L226 Difference]: Without dead ends: 0 [2021-10-08 15:52:20,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-08 15:52:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-08 15:52:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-08 15:52:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 15:52:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-08 15:52:20,411 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-08 15:52:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 15:52:20,411 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-08 15:52:20,411 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) [2021-10-08 15:52:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-08 15:52:20,411 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-08 15:52:20,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 15:52:20,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 15:52:20,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-08 15:52:20,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-08 15:52:20,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-08 15:52:20,632 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 [2021-10-08 15:52:20,641 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 15:52:20,641 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 15:52:20,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 03:52:20 BasicIcfg [2021-10-08 15:52:20,644 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 15:52:20,645 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-08 15:52:20,645 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-08 15:52:20,645 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-08 15:52:20,645 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 03:52:09" (3/4) ... [2021-10-08 15:52:20,649 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-08 15:52:20,656 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-08 15:52:20,656 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-08 15:52:20,657 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-08 15:52:20,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-08 15:52:20,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-08 15:52:20,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-08 15:52:20,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-08 15:52:20,710 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/weaver/parallel-misc-4.wvr.c-witness.graphml [2021-10-08 15:52:20,710 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-08 15:52:20,712 INFO L168 Benchmark]: Toolchain (without parser) took 12148.90 ms. Allocated memory was 159.4 MB in the beginning and 350.2 MB in the end (delta: 190.8 MB). Free memory was 134.5 MB in the beginning and 229.6 MB in the end (delta: -95.2 MB). Peak memory consumption was 96.7 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:20,713 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-10-08 15:52:20,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.60 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 123.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:20,714 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.24 ms. Allocated memory is still 159.4 MB. Free memory was 123.9 MB in the beginning and 122.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:20,715 INFO L168 Benchmark]: Boogie Preprocessor took 69.36 ms. Allocated memory is still 159.4 MB. Free memory was 122.5 MB in the beginning and 120.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:20,715 INFO L168 Benchmark]: RCFGBuilder took 698.76 ms. Allocated memory is still 159.4 MB. Free memory was 120.8 MB in the beginning and 106.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:20,716 INFO L168 Benchmark]: TraceAbstraction took 10938.48 ms. Allocated memory was 159.4 MB in the beginning and 350.2 MB in the end (delta: 190.8 MB). Free memory was 105.7 MB in the beginning and 232.8 MB in the end (delta: -127.1 MB). Peak memory consumption was 65.2 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:20,716 INFO L168 Benchmark]: Witness Printer took 65.82 ms. Allocated memory is still 350.2 MB. Free memory was 232.3 MB in the beginning and 229.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-10-08 15:52:20,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 132.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 297.60 ms. Allocated memory is still 159.4 MB. Free memory was 134.0 MB in the beginning and 123.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 59.24 ms. Allocated memory is still 159.4 MB. Free memory was 123.9 MB in the beginning and 122.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.36 ms. Allocated memory is still 159.4 MB. Free memory was 122.5 MB in the beginning and 120.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 698.76 ms. Allocated memory is still 159.4 MB. Free memory was 120.8 MB in the beginning and 106.2 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10938.48 ms. Allocated memory was 159.4 MB in the beginning and 350.2 MB in the end (delta: 190.8 MB). Free memory was 105.7 MB in the beginning and 232.8 MB in the end (delta: -127.1 MB). Peak memory consumption was 65.2 MB. Max. memory is 8.0 GB. * Witness Printer took 65.82 ms. Allocated memory is still 350.2 MB. Free memory was 232.3 MB in the beginning and 229.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4355.6ms, 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: 132, positive: 48, positive conditional: 0, positive unconditional: 48, negative: 84, negative conditional: 0, negative unconditional: 84, 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: 10705.2ms, OverallIterations: 19, TraceHistogramMax: 2, EmptinessCheckTime: 38.1ms, AutomataDifference: 1975.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4478.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 492 SDtfs, 962 SDslu, 603 SDs, 0 SdLazy, 529 SolverSat, 271 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 641.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 118.7ms 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: 1927.3ms AutomataMinimizationTime, 19 MinimizatonAttempts, 9846 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 62.7ms SsaConstructionTime, 338.1ms SatisfiabilityAnalysisTime, 979.7ms 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! [2021-10-08 15:52:20,782 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...