/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-wmm/safe036_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 18:13:08,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 18:13:08,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 18:13:08,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 18:13:08,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 18:13:08,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 18:13:08,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 18:13:08,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 18:13:08,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 18:13:08,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 18:13:08,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 18:13:08,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 18:13:08,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 18:13:08,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 18:13:08,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 18:13:08,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 18:13:08,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 18:13:08,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 18:13:08,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 18:13:08,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 18:13:08,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 18:13:08,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 18:13:08,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 18:13:08,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 18:13:08,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 18:13:08,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 18:13:08,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 18:13:08,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 18:13:08,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 18:13:08,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 18:13:08,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 18:13:08,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 18:13:08,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 18:13:08,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 18:13:08,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 18:13:08,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 18:13:08,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 18:13:08,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 18:13:08,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 18:13:08,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 18:13:08,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 18:13:08,701 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 18:13:08,751 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 18:13:08,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 18:13:08,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 18:13:08,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 18:13:08,753 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 18:13:08,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 18:13:08,753 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 18:13:08,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 18:13:08,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 18:13:08,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 18:13:08,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 18:13:08,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 18:13:08,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 18:13:08,756 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 18:13:08,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 18:13:08,757 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 18:13:08,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 18:13:08,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 18:13:08,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 18:13:08,758 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 18:13:08,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 18:13:08,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 18:13:08,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 18:13:08,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 18:13:08,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 18:13:08,759 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 18:13:08,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 18:13:08,760 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 18:13:08,760 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 18:13:08,761 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 18:13:09,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 18:13:09,084 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 18:13:09,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 18:13:09,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 18:13:09,092 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 18:13:09,093 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036_tso.opt.i [2020-10-09 18:13:09,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9447cbd/9440033c0c5c42a29a8211c3e2aa59bd/FLAG146010198 [2020-10-09 18:13:09,620 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 18:13:09,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036_tso.opt.i [2020-10-09 18:13:09,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9447cbd/9440033c0c5c42a29a8211c3e2aa59bd/FLAG146010198 [2020-10-09 18:13:09,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9447cbd/9440033c0c5c42a29a8211c3e2aa59bd [2020-10-09 18:13:10,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 18:13:10,003 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 18:13:10,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 18:13:10,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 18:13:10,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 18:13:10,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:13:09" (1/1) ... [2020-10-09 18:13:10,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f47a83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10, skipping insertion in model container [2020-10-09 18:13:10,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 06:13:09" (1/1) ... [2020-10-09 18:13:10,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 18:13:10,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 18:13:10,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:13:10,543 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 18:13:10,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 18:13:10,667 INFO L208 MainTranslator]: Completed translation [2020-10-09 18:13:10,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10 WrapperNode [2020-10-09 18:13:10,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 18:13:10,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 18:13:10,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 18:13:10,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 18:13:10,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (1/1) ... [2020-10-09 18:13:10,693 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (1/1) ... [2020-10-09 18:13:10,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 18:13:10,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 18:13:10,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 18:13:10,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 18:13:10,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (1/1) ... [2020-10-09 18:13:10,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (1/1) ... [2020-10-09 18:13:10,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (1/1) ... [2020-10-09 18:13:10,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (1/1) ... [2020-10-09 18:13:10,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (1/1) ... [2020-10-09 18:13:10,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (1/1) ... [2020-10-09 18:13:10,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (1/1) ... [2020-10-09 18:13:10,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 18:13:10,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 18:13:10,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 18:13:10,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 18:13:10,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (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 18:13:10,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 18:13:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 18:13:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 18:13:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 18:13:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 18:13:10,811 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 18:13:10,811 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 18:13:10,811 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 18:13:10,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 18:13:10,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 18:13:10,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 18:13:10,814 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 18:13:11,151 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 18:13:11,151 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 18:13:11,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:13:11 BoogieIcfgContainer [2020-10-09 18:13:11,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 18:13:11,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 18:13:11,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 18:13:11,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 18:13:11,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 06:13:09" (1/3) ... [2020-10-09 18:13:11,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9640a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:13:11, skipping insertion in model container [2020-10-09 18:13:11,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 06:13:10" (2/3) ... [2020-10-09 18:13:11,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9640a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 06:13:11, skipping insertion in model container [2020-10-09 18:13:11,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 06:13:11" (3/3) ... [2020-10-09 18:13:11,162 INFO L111 eAbstractionObserver]: Analyzing ICFG safe036_tso.opt.i [2020-10-09 18:13:11,173 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 18:13:11,180 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 18:13:11,181 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 18:13:11,203 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,204 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,204 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,204 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,205 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,205 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,206 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,206 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,206 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,206 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,207 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,207 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,211 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,211 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,211 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,211 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,219 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,219 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,219 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,220 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 18:13:11,237 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 18:13:11,255 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 18:13:11,256 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 18:13:11,256 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 18:13:11,256 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 18:13:11,256 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 18:13:11,256 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 18:13:11,257 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 18:13:11,257 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 18:13:11,268 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 56 transitions, 122 flow [2020-10-09 18:13:11,302 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2020-10-09 18:13:11,302 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:13:11,307 INFO L80 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 54 events. 2/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-09 18:13:11,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 56 transitions, 122 flow [2020-10-09 18:13:11,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 45 transitions, 96 flow [2020-10-09 18:13:11,329 INFO L129 PetriNetUnfolder]: 1/44 cut-off events. [2020-10-09 18:13:11,329 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:13:11,329 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:13:11,331 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] [2020-10-09 18:13:11,331 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:13:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:13:11,339 INFO L82 PathProgramCache]: Analyzing trace with hash -328445311, now seen corresponding path program 1 times [2020-10-09 18:13:11,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:13:11,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399772095] [2020-10-09 18:13:11,355 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 18:13:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:13:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 18:13:11,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:13:11,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:13:11,559 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 18:13:11,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:13:11,597 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 18:13:11,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399772095] [2020-10-09 18:13:11,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:13:11,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 18:13:11,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112480112] [2020-10-09 18:13:11,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 18:13:11,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:13:11,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 18:13:11,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 18:13:11,825 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 56 [2020-10-09 18:13:11,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 96 flow. Second operand 8 states. [2020-10-09 18:13:11,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:13:11,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 56 [2020-10-09 18:13:11,830 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:13:12,044 INFO L129 PetriNetUnfolder]: 20/97 cut-off events. [2020-10-09 18:13:12,044 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 18:13:12,045 INFO L80 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 97 events. 20/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 275 event pairs, 0 based on Foata normal form. 5/100 useless extension candidates. Maximal degree in co-relation 133. Up to 12 conditions per place. [2020-10-09 18:13:12,047 INFO L132 encePairwiseOnDemand]: 46/56 looper letters, 4 selfloop transitions, 7 changer transitions 23/68 dead transitions. [2020-10-09 18:13:12,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 68 transitions, 210 flow [2020-10-09 18:13:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 18:13:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 18:13:12,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 613 transitions. [2020-10-09 18:13:12,067 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.842032967032967 [2020-10-09 18:13:12,068 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 613 transitions. [2020-10-09 18:13:12,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 613 transitions. [2020-10-09 18:13:12,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:13:12,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 613 transitions. [2020-10-09 18:13:12,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 18:13:12,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 18:13:12,088 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 18:13:12,091 INFO L185 Difference]: Start difference. First operand has 51 places, 45 transitions, 96 flow. Second operand 13 states and 613 transitions. [2020-10-09 18:13:12,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 68 transitions, 210 flow [2020-10-09 18:13:12,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 18:13:12,100 INFO L241 Difference]: Finished difference. Result has 70 places, 45 transitions, 136 flow [2020-10-09 18:13:12,103 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=136, PETRI_PLACES=70, PETRI_TRANSITIONS=45} [2020-10-09 18:13:12,104 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2020-10-09 18:13:12,105 INFO L481 AbstractCegarLoop]: Abstraction has has 70 places, 45 transitions, 136 flow [2020-10-09 18:13:12,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 18:13:12,105 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:13:12,105 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] [2020-10-09 18:13:12,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 18:13:12,325 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:13:12,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:13:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1077655171, now seen corresponding path program 1 times [2020-10-09 18:13:12,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:13:12,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202943675] [2020-10-09 18:13:12,327 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 18:13:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 18:13:12,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:13:12,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:13:12,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:13:12,448 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 18:13:12,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:13:12,504 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 18:13:12,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202943675] [2020-10-09 18:13:12,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:13:12,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 18:13:12,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384767011] [2020-10-09 18:13:12,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 18:13:12,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:13:12,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 18:13:12,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 18:13:12,701 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 56 [2020-10-09 18:13:12,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 45 transitions, 136 flow. Second operand 9 states. [2020-10-09 18:13:12,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:13:12,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 56 [2020-10-09 18:13:12,702 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:13:12,785 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2020-10-09 18:13:12,785 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2020-10-09 18:13:12,786 INFO L80 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 69 events. 2/69 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 0 based on Foata normal form. 1/70 useless extension candidates. Maximal degree in co-relation 107. Up to 7 conditions per place. [2020-10-09 18:13:12,786 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 9 selfloop transitions, 1 changer transitions 5/50 dead transitions. [2020-10-09 18:13:12,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 50 transitions, 176 flow [2020-10-09 18:13:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 18:13:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 18:13:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2020-10-09 18:13:12,788 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.826530612244898 [2020-10-09 18:13:12,789 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 324 transitions. [2020-10-09 18:13:12,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 324 transitions. [2020-10-09 18:13:12,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:13:12,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 324 transitions. [2020-10-09 18:13:12,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 18:13:12,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 18:13:12,791 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 18:13:12,791 INFO L185 Difference]: Start difference. First operand has 70 places, 45 transitions, 136 flow. Second operand 7 states and 324 transitions. [2020-10-09 18:13:12,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 50 transitions, 176 flow [2020-10-09 18:13:12,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 50 transitions, 144 flow, removed 9 selfloop flow, removed 11 redundant places. [2020-10-09 18:13:12,796 INFO L241 Difference]: Finished difference. Result has 62 places, 45 transitions, 117 flow [2020-10-09 18:13:12,796 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2020-10-09 18:13:12,797 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2020-10-09 18:13:12,797 INFO L481 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 117 flow [2020-10-09 18:13:12,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 18:13:12,797 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 18:13:12,797 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] [2020-10-09 18:13:13,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 18:13:13,010 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 18:13:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 18:13:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1027719231, now seen corresponding path program 2 times [2020-10-09 18:13:13,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 18:13:13,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075598213] [2020-10-09 18:13:13,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 18:13:13,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 18:13:13,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 18:13:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 18:13:13,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 18:13:13,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 18:13:13,125 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 18:13:13,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 18:13:13,169 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 18:13:13,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075598213] [2020-10-09 18:13:13,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 18:13:13,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 18:13:13,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666966020] [2020-10-09 18:13:13,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 18:13:13,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 18:13:13,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 18:13:13,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 18:13:13,413 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 56 [2020-10-09 18:13:13,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 117 flow. Second operand 9 states. [2020-10-09 18:13:13,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 18:13:13,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 56 [2020-10-09 18:13:13,414 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 18:13:13,488 INFO L129 PetriNetUnfolder]: 1/55 cut-off events. [2020-10-09 18:13:13,489 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-09 18:13:13,489 INFO L80 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 55 events. 1/55 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 52 event pairs, 0 based on Foata normal form. 1/55 useless extension candidates. Maximal degree in co-relation 84. Up to 5 conditions per place. [2020-10-09 18:13:13,490 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2020-10-09 18:13:13,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 44 transitions, 133 flow [2020-10-09 18:13:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 18:13:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 18:13:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 319 transitions. [2020-10-09 18:13:13,492 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8137755102040817 [2020-10-09 18:13:13,492 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 319 transitions. [2020-10-09 18:13:13,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 319 transitions. [2020-10-09 18:13:13,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 18:13:13,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 319 transitions. [2020-10-09 18:13:13,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 18:13:13,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 18:13:13,494 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 18:13:13,494 INFO L185 Difference]: Start difference. First operand has 62 places, 45 transitions, 117 flow. Second operand 7 states and 319 transitions. [2020-10-09 18:13:13,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 44 transitions, 133 flow [2020-10-09 18:13:13,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 126 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-09 18:13:13,496 INFO L241 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2020-10-09 18:13:13,497 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=58, PETRI_TRANSITIONS=0} [2020-10-09 18:13:13,497 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2020-10-09 18:13:13,497 INFO L481 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2020-10-09 18:13:13,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 18:13:13,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 18:13:13,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 06:13:13 BasicIcfg [2020-10-09 18:13:13,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 18:13:13,708 INFO L168 Benchmark]: Toolchain (without parser) took 3704.53 ms. Allocated memory was 252.7 MB in the beginning and 373.8 MB in the end (delta: 121.1 MB). Free memory was 208.0 MB in the beginning and 333.6 MB in the end (delta: -125.6 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:13:13,709 INFO L168 Benchmark]: CDTParser took 1.36 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:13:13,710 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.56 ms. Allocated memory was 252.7 MB in the beginning and 317.7 MB in the end (delta: 65.0 MB). Free memory was 208.0 MB in the beginning and 271.0 MB in the end (delta: -63.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 14.2 GB. [2020-10-09 18:13:13,711 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.70 ms. Allocated memory is still 317.7 MB. Free memory was 271.0 MB in the beginning and 268.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 18:13:13,712 INFO L168 Benchmark]: Boogie Preprocessor took 26.06 ms. Allocated memory is still 317.7 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:13:13,712 INFO L168 Benchmark]: RCFGBuilder took 411.18 ms. Allocated memory is still 317.7 MB. Free memory was 268.5 MB in the beginning and 246.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 18:13:13,713 INFO L168 Benchmark]: TraceAbstraction took 2551.09 ms. Allocated memory was 317.7 MB in the beginning and 373.8 MB in the end (delta: 56.1 MB). Free memory was 246.7 MB in the beginning and 333.6 MB in the end (delta: -86.9 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 18:13:13,718 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.36 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 663.56 ms. Allocated memory was 252.7 MB in the beginning and 317.7 MB in the end (delta: 65.0 MB). Free memory was 208.0 MB in the beginning and 271.0 MB in the end (delta: -63.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 47.70 ms. Allocated memory is still 317.7 MB. Free memory was 271.0 MB in the beginning and 268.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.06 ms. Allocated memory is still 317.7 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 411.18 ms. Allocated memory is still 317.7 MB. Free memory was 268.5 MB in the beginning and 246.7 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2551.09 ms. Allocated memory was 317.7 MB in the beginning and 373.8 MB in the end (delta: 56.1 MB). Free memory was 246.7 MB in the beginning and 333.6 MB in the end (delta: -86.9 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 101 SDslu, 260 SDs, 0 SdLazy, 194 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 228 GetRequests, 186 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 16442 SizeOfPredicates, 17 NumberOfNonLiveVariables, 262 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...