/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-atomic/gcd-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:50:30,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:50:30,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:50:30,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:50:30,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:50:30,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:50:30,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:50:30,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:50:30,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:50:30,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:50:30,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:50:30,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:50:30,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:50:30,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:50:30,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:50:30,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:50:30,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:50:30,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:50:30,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:50:30,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:50:30,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:50:30,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:50:30,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:50:30,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:50:30,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 14:50:30,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:50:30,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:50:30,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:50:30,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:50:30,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:50:30,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:50:30,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:50:30,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:50:30,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:50:30,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:50:30,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:50:30,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:50:30,873 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:50:30,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:50:30,875 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:50:30,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:50:30,875 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:50:30,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:50:30,876 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:50:30,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:50:30,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:50:30,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:50:30,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:50:30,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:50:30,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:50:30,877 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:50:30,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:50:30,877 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:50:30,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:50:30,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:50:30,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:50:30,878 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:50:30,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:50:30,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:50:30,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:50:30,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:50:30,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:50:30,879 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:50:30,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:50:30,879 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:50:30,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:50:30,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:50:31,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:50:31,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:50:31,242 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:50:31,244 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:50:31,244 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:50:31,245 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/gcd-2.i [2020-10-09 14:50:31,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3dc922f/d869f174b2e64d2484aaea60f142fcfd/FLAG7a422d622 [2020-10-09 14:50:31,871 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:50:31,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/gcd-2.i [2020-10-09 14:50:31,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3dc922f/d869f174b2e64d2484aaea60f142fcfd/FLAG7a422d622 [2020-10-09 14:50:32,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c3dc922f/d869f174b2e64d2484aaea60f142fcfd [2020-10-09 14:50:32,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:50:32,157 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:50:32,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:50:32,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:50:32,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:50:32,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f0cf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32, skipping insertion in model container [2020-10-09 14:50:32,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:50:32,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:50:32,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:50:32,650 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:50:32,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:50:32,789 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:50:32,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32 WrapperNode [2020-10-09 14:50:32,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:50:32,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:50:32,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:50:32,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:50:32,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:50:32,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:50:32,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:50:32,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:50:32,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... [2020-10-09 14:50:32,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:50:32,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:50:32,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:50:32,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:50:32,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:50:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 14:50:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:50:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:50:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:50:32,951 INFO L130 BoogieDeclarations]: Found specification of procedure dec_a [2020-10-09 14:50:32,952 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_a [2020-10-09 14:50:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure dec_b [2020-10-09 14:50:32,952 INFO L138 BoogieDeclarations]: Found implementation of procedure dec_b [2020-10-09 14:50:32,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:50:32,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:50:32,954 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:50:33,605 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:50:33,606 INFO L298 CfgBuilder]: Removed 26 assume(true) statements. [2020-10-09 14:50:33,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:50:33 BoogieIcfgContainer [2020-10-09 14:50:33,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:50:33,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:50:33,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:50:33,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:50:33,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:50:32" (1/3) ... [2020-10-09 14:50:33,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722530ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:50:33, skipping insertion in model container [2020-10-09 14:50:33,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:50:32" (2/3) ... [2020-10-09 14:50:33,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722530ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:50:33, skipping insertion in model container [2020-10-09 14:50:33,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:50:33" (3/3) ... [2020-10-09 14:50:33,622 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd-2.i [2020-10-09 14:50:33,636 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:50:33,645 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-10-09 14:50:33,646 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:50:33,677 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,677 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,677 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,678 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,678 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,679 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,680 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,680 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,680 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,681 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,681 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,681 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,686 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,687 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,687 WARN L313 ript$VariableManager]: TermVariabe |dec_aThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,687 WARN L313 ript$VariableManager]: TermVariabe dec_aThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,695 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,696 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,696 WARN L313 ript$VariableManager]: TermVariabe |dec_bThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,696 WARN L313 ript$VariableManager]: TermVariabe dec_bThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:50:33,727 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-09 14:50:33,755 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:50:33,755 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:50:33,756 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:50:33,756 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:50:33,756 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:50:33,757 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:50:33,757 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:50:33,757 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:50:33,779 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 258 flow [2020-10-09 14:50:33,859 INFO L129 PetriNetUnfolder]: 13/118 cut-off events. [2020-10-09 14:50:33,860 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 14:50:33,866 INFO L80 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 118 events. 13/118 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 57 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 68. Up to 3 conditions per place. [2020-10-09 14:50:33,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 118 transitions, 258 flow [2020-10-09 14:50:33,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 110 transitions, 238 flow [2020-10-09 14:50:33,910 INFO L129 PetriNetUnfolder]: 11/99 cut-off events. [2020-10-09 14:50:33,910 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 14:50:33,911 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:50:33,912 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:50:33,913 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:50:33,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:50:33,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2016127771, now seen corresponding path program 1 times [2020-10-09 14:50:33,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:50:33,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1765084965] [2020-10-09 14:50:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:50:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:50:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 14:50:34,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:50:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:50:34,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:50:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:50:34,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1765084965] [2020-10-09 14:50:34,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:50:34,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 14:50:34,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664441312] [2020-10-09 14:50:34,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 14:50:34,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:50:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 14:50:34,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 14:50:34,192 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 118 [2020-10-09 14:50:34,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 238 flow. Second operand 2 states. [2020-10-09 14:50:34,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:50:34,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 118 [2020-10-09 14:50:34,196 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:50:34,262 INFO L129 PetriNetUnfolder]: 3/103 cut-off events. [2020-10-09 14:50:34,263 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 14:50:34,266 INFO L80 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 103 events. 3/103 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 9/103 useless extension candidates. Maximal degree in co-relation 111. Up to 3 conditions per place. [2020-10-09 14:50:34,268 INFO L132 encePairwiseOnDemand]: 109/118 looper letters, 0 selfloop transitions, 0 changer transitions 5/101 dead transitions. [2020-10-09 14:50:34,268 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 220 flow [2020-10-09 14:50:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 14:50:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 14:50:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 225 transitions. [2020-10-09 14:50:34,284 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9533898305084746 [2020-10-09 14:50:34,285 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 225 transitions. [2020-10-09 14:50:34,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 225 transitions. [2020-10-09 14:50:34,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:50:34,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 225 transitions. [2020-10-09 14:50:34,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 14:50:34,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 14:50:34,300 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 14:50:34,302 INFO L185 Difference]: Start difference. First operand has 104 places, 110 transitions, 238 flow. Second operand 2 states and 225 transitions. [2020-10-09 14:50:34,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 220 flow [2020-10-09 14:50:34,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-09 14:50:34,313 INFO L241 Difference]: Finished difference. Result has 101 places, 96 transitions, 198 flow [2020-10-09 14:50:34,317 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=118, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2020-10-09 14:50:34,318 INFO L341 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2020-10-09 14:50:34,318 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 198 flow [2020-10-09 14:50:34,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 14:50:34,318 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:50:34,319 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:50:34,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:50:34,534 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:50:34,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:50:34,535 INFO L82 PathProgramCache]: Analyzing trace with hash 73966807, now seen corresponding path program 1 times [2020-10-09 14:50:34,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:50:34,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996449907] [2020-10-09 14:50:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:50:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:50:39,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 14:50:39,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:50:39,591 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-09 14:50:39,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:50:39,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-09 14:50:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:50:39,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:50:40,001 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:50:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:50:44,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996449907] [2020-10-09 14:50:44,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:50:44,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 15] imperfect sequences [] total 26 [2020-10-09 14:50:44,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899083047] [2020-10-09 14:50:44,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 14:50:44,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:50:44,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 14:50:44,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=565, Unknown=1, NotChecked=0, Total=650 [2020-10-09 14:52:45,769 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 118 [2020-10-09 14:52:45,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 198 flow. Second operand 26 states. [2020-10-09 14:52:45,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:52:45,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 118 [2020-10-09 14:52:45,771 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:52:46,126 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-10-09 14:52:46,458 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 11 [2020-10-09 14:52:48,562 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-10-09 14:52:48,991 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-10-09 14:52:49,165 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-10-09 14:52:49,481 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2020-10-09 14:52:49,646 INFO L129 PetriNetUnfolder]: 30/215 cut-off events. [2020-10-09 14:52:49,647 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:52:49,648 INFO L80 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 215 events. 30/215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 505 event pairs, 10 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 346. Up to 64 conditions per place. [2020-10-09 14:52:49,650 INFO L132 encePairwiseOnDemand]: 99/118 looper letters, 73 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2020-10-09 14:52:49,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 454 flow [2020-10-09 14:52:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 14:52:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-09 14:52:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 938 transitions. [2020-10-09 14:52:49,664 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.4416195856873823 [2020-10-09 14:52:49,664 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 938 transitions. [2020-10-09 14:52:49,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 938 transitions. [2020-10-09 14:52:49,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:52:49,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 938 transitions. [2020-10-09 14:52:49,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-09 14:52:49,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-09 14:52:49,686 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-09 14:52:49,686 INFO L185 Difference]: Start difference. First operand has 101 places, 96 transitions, 198 flow. Second operand 18 states and 938 transitions. [2020-10-09 14:52:49,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 454 flow [2020-10-09 14:52:49,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 133 transitions, 454 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 14:52:49,694 INFO L241 Difference]: Finished difference. Result has 122 places, 106 transitions, 296 flow [2020-10-09 14:52:49,695 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=118, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=296, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2020-10-09 14:52:49,696 INFO L341 CegarLoopForPetriNet]: 104 programPoint places, 18 predicate places. [2020-10-09 14:52:49,696 INFO L481 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 296 flow [2020-10-09 14:52:49,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 14:52:49,696 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:52:49,697 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:52:49,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:52:49,912 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:52:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:52:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2019457965, now seen corresponding path program 1 times [2020-10-09 14:52:49,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:52:49,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560084577] [2020-10-09 14:52:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown