/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_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 18:47:20,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 18:47:20,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 18:47:20,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 18:47:20,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 18:47:20,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 18:47:20,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 18:47:20,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 18:47:20,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 18:47:20,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 18:47:20,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 18:47:20,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 18:47:20,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 18:47:20,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 18:47:20,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 18:47:20,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 18:47:20,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 18:47:20,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 18:47:20,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 18:47:20,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 18:47:20,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 18:47:20,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 18:47:20,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 18:47:20,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 18:47:20,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-11 18:47:20,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 18:47:20,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 18:47:20,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 18:47:20,725 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 18:47:20,771 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 18:47:20,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 18:47:20,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 18:47:20,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 18:47:20,773 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 18:47:20,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 18:47:20,773 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 18:47:20,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 18:47:20,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 18:47:20,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 18:47:20,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 18:47:20,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 18:47:20,775 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 18:47:20,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 18:47:20,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 18:47:20,776 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 18:47:20,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 18:47:20,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 18:47:20,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 18:47:20,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 18:47:20,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 18:47:20,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 18:47:20,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 18:47:20,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 18:47:20,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 18:47:20,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 18:47:20,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 18:47:20,779 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 18:47:20,779 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 18:47:20,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 18:47:21,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 18:47:21,069 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 18:47:21,073 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 18:47:21,074 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 18:47:21,075 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 18:47:21,075 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036_pso.opt.i [2020-10-11 18:47:21,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02539f5c7/4d04b904dd694d4b874fb938a8026a8f/FLAGd48a0a6f0 [2020-10-11 18:47:21,654 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 18:47:21,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036_pso.opt.i [2020-10-11 18:47:21,668 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02539f5c7/4d04b904dd694d4b874fb938a8026a8f/FLAGd48a0a6f0 [2020-10-11 18:47:21,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02539f5c7/4d04b904dd694d4b874fb938a8026a8f [2020-10-11 18:47:21,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 18:47:21,981 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 18:47:21,982 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 18:47:21,983 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 18:47:21,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 18:47:21,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:47:21" (1/1) ... [2020-10-11 18:47:21,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68cbb2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:21, skipping insertion in model container [2020-10-11 18:47:21,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:47:21" (1/1) ... [2020-10-11 18:47:21,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 18:47:22,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 18:47:22,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 18:47:22,542 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 18:47:22,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 18:47:22,693 INFO L208 MainTranslator]: Completed translation [2020-10-11 18:47:22,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22 WrapperNode [2020-10-11 18:47:22,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 18:47:22,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 18:47:22,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 18:47:22,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 18:47:22,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (1/1) ... [2020-10-11 18:47:22,720 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (1/1) ... [2020-10-11 18:47:22,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 18:47:22,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 18:47:22,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 18:47:22,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 18:47:22,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (1/1) ... [2020-10-11 18:47:22,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (1/1) ... [2020-10-11 18:47:22,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (1/1) ... [2020-10-11 18:47:22,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (1/1) ... [2020-10-11 18:47:22,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (1/1) ... [2020-10-11 18:47:22,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (1/1) ... [2020-10-11 18:47:22,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (1/1) ... [2020-10-11 18:47:22,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 18:47:22,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 18:47:22,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 18:47:22,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 18:47:22,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (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 [2020-10-11 18:47:22,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 18:47:22,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 18:47:22,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 18:47:22,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 18:47:22,840 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-11 18:47:22,840 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-11 18:47:22,841 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-11 18:47:22,841 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-11 18:47:22,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 18:47:22,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 18:47:22,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 18:47:22,843 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 18:47:23,175 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 18:47:23,175 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-11 18:47:23,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:47:23 BoogieIcfgContainer [2020-10-11 18:47:23,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 18:47:23,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 18:47:23,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 18:47:23,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 18:47:23,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 06:47:21" (1/3) ... [2020-10-11 18:47:23,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49004224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:47:23, skipping insertion in model container [2020-10-11 18:47:23,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:47:22" (2/3) ... [2020-10-11 18:47:23,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49004224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:47:23, skipping insertion in model container [2020-10-11 18:47:23,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:47:23" (3/3) ... [2020-10-11 18:47:23,187 INFO L111 eAbstractionObserver]: Analyzing ICFG safe036_pso.opt.i [2020-10-11 18:47:23,198 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 18:47:23,206 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 18:47:23,207 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 18:47:23,232 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,232 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,232 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,233 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,233 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,234 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,234 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,234 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,235 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,235 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,235 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,236 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,242 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,243 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,243 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,243 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,248 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,249 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,249 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,249 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 18:47:23,266 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 18:47:23,285 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 18:47:23,285 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 18:47:23,285 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 18:47:23,285 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 18:47:23,286 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 18:47:23,286 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 18:47:23,286 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 18:47:23,286 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 18:47:23,299 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 56 transitions, 122 flow [2020-10-11 18:47:23,339 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2020-10-11 18:47:23,339 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 18:47:23,344 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. [2020-10-11 18:47:23,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 56 transitions, 122 flow [2020-10-11 18:47:23,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 45 transitions, 96 flow [2020-10-11 18:47:23,367 INFO L129 PetriNetUnfolder]: 1/44 cut-off events. [2020-10-11 18:47:23,367 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 18:47:23,367 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:47:23,368 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] [2020-10-11 18:47:23,369 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:47:23,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:47:23,375 INFO L82 PathProgramCache]: Analyzing trace with hash -328445311, now seen corresponding path program 1 times [2020-10-11 18:47:23,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:47:23,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613955983] [2020-10-11 18:47:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:47:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:47:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:47:23,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613955983] [2020-10-11 18:47:23,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 18:47:23,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-11 18:47:23,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281723735] [2020-10-11 18:47:23,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 18:47:23,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:47:23,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 18:47:23,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-11 18:47:24,014 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 56 [2020-10-11 18:47:24,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 96 flow. Second operand 6 states. [2020-10-11 18:47:24,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:47:24,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 56 [2020-10-11 18:47:24,019 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:47:24,233 INFO L129 PetriNetUnfolder]: 30/131 cut-off events. [2020-10-11 18:47:24,233 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 18:47:24,235 INFO L80 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 131 events. 30/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 492 event pairs, 0 based on Foata normal form. 7/134 useless extension candidates. Maximal degree in co-relation 189. Up to 26 conditions per place. [2020-10-11 18:47:24,238 INFO L132 encePairwiseOnDemand]: 46/56 looper letters, 8 selfloop transitions, 5 changer transitions 20/67 dead transitions. [2020-10-11 18:47:24,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 206 flow [2020-10-11 18:47:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 18:47:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-11 18:47:24,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 478 transitions. [2020-10-11 18:47:24,257 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8535714285714285 [2020-10-11 18:47:24,258 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 478 transitions. [2020-10-11 18:47:24,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 478 transitions. [2020-10-11 18:47:24,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:47:24,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 478 transitions. [2020-10-11 18:47:24,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-11 18:47:24,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-11 18:47:24,279 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-11 18:47:24,282 INFO L185 Difference]: Start difference. First operand has 51 places, 45 transitions, 96 flow. Second operand 10 states and 478 transitions. [2020-10-11 18:47:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 206 flow [2020-10-11 18:47:24,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-11 18:47:24,292 INFO L241 Difference]: Finished difference. Result has 64 places, 45 transitions, 134 flow [2020-10-11 18:47:24,295 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=134, PETRI_PLACES=64, PETRI_TRANSITIONS=45} [2020-10-11 18:47:24,296 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2020-10-11 18:47:24,297 INFO L481 AbstractCegarLoop]: Abstraction has has 64 places, 45 transitions, 134 flow [2020-10-11 18:47:24,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 18:47:24,297 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:47:24,297 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] [2020-10-11 18:47:24,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 18:47:24,298 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:47:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:47:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash 948483647, now seen corresponding path program 1 times [2020-10-11 18:47:24,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:47:24,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305475770] [2020-10-11 18:47:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:47:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:47:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:47:24,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305475770] [2020-10-11 18:47:24,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 18:47:24,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 18:47:24,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770763014] [2020-10-11 18:47:24,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 18:47:24,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:47:24,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 18:47:24,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-11 18:47:24,675 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 56 [2020-10-11 18:47:24,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 45 transitions, 134 flow. Second operand 7 states. [2020-10-11 18:47:24,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:47:24,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 56 [2020-10-11 18:47:24,676 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:47:24,824 INFO L129 PetriNetUnfolder]: 8/68 cut-off events. [2020-10-11 18:47:24,825 INFO L130 PetriNetUnfolder]: For 69/72 co-relation queries the response was YES. [2020-10-11 18:47:24,825 INFO L80 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 68 events. 8/68 cut-off events. For 69/72 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 114 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 152. Up to 17 conditions per place. [2020-10-11 18:47:24,826 INFO L132 encePairwiseOnDemand]: 48/56 looper letters, 4 selfloop transitions, 7 changer transitions 11/56 dead transitions. [2020-10-11 18:47:24,826 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 243 flow [2020-10-11 18:47:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 18:47:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-11 18:47:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 464 transitions. [2020-10-11 18:47:24,830 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2020-10-11 18:47:24,830 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 464 transitions. [2020-10-11 18:47:24,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 464 transitions. [2020-10-11 18:47:24,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:47:24,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 464 transitions. [2020-10-11 18:47:24,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-11 18:47:24,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-11 18:47:24,835 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-11 18:47:24,836 INFO L185 Difference]: Start difference. First operand has 64 places, 45 transitions, 134 flow. Second operand 10 states and 464 transitions. [2020-10-11 18:47:24,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 243 flow [2020-10-11 18:47:24,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 208 flow, removed 13 selfloop flow, removed 5 redundant places. [2020-10-11 18:47:24,841 INFO L241 Difference]: Finished difference. Result has 68 places, 45 transitions, 150 flow [2020-10-11 18:47:24,842 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=150, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2020-10-11 18:47:24,843 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2020-10-11 18:47:24,843 INFO L481 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 150 flow [2020-10-11 18:47:24,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 18:47:24,843 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:47:24,843 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] [2020-10-11 18:47:24,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 18:47:24,844 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:47:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:47:24,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1027719231, now seen corresponding path program 1 times [2020-10-11 18:47:24,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:47:24,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898543322] [2020-10-11 18:47:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:47:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:47:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:47:24,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898543322] [2020-10-11 18:47:24,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 18:47:24,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 18:47:24,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565864098] [2020-10-11 18:47:24,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 18:47:24,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:47:24,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 18:47:24,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-11 18:47:25,219 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 56 [2020-10-11 18:47:25,220 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 150 flow. Second operand 7 states. [2020-10-11 18:47:25,220 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:47:25,220 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 56 [2020-10-11 18:47:25,220 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:47:25,323 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2020-10-11 18:47:25,323 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2020-10-11 18:47:25,324 INFO L80 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 69 events. 2/69 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 119. Up to 11 conditions per place. [2020-10-11 18:47:25,324 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 9 selfloop transitions, 1 changer transitions 5/50 dead transitions. [2020-10-11 18:47:25,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 50 transitions, 190 flow [2020-10-11 18:47:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 18:47:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 18:47:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 324 transitions. [2020-10-11 18:47:25,326 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.826530612244898 [2020-10-11 18:47:25,327 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 324 transitions. [2020-10-11 18:47:25,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 324 transitions. [2020-10-11 18:47:25,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:47:25,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 324 transitions. [2020-10-11 18:47:25,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 18:47:25,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 18:47:25,330 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 18:47:25,330 INFO L185 Difference]: Start difference. First operand has 68 places, 45 transitions, 150 flow. Second operand 7 states and 324 transitions. [2020-10-11 18:47:25,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 50 transitions, 190 flow [2020-10-11 18:47:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 50 transitions, 144 flow, removed 13 selfloop flow, removed 13 redundant places. [2020-10-11 18:47:25,334 INFO L241 Difference]: Finished difference. Result has 62 places, 45 transitions, 117 flow [2020-10-11 18:47:25,335 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} [2020-10-11 18:47:25,335 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2020-10-11 18:47:25,335 INFO L481 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 117 flow [2020-10-11 18:47:25,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 18:47:25,336 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 18:47:25,336 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] [2020-10-11 18:47:25,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 18:47:25,337 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 18:47:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 18:47:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash -923020957, now seen corresponding path program 2 times [2020-10-11 18:47:25,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 18:47:25,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145035431] [2020-10-11 18:47:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 18:47:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 18:47:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 18:47:25,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145035431] [2020-10-11 18:47:25,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 18:47:25,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-11 18:47:25,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776349749] [2020-10-11 18:47:25,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 18:47:25,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 18:47:25,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 18:47:25,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-11 18:47:25,691 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 56 [2020-10-11 18:47:25,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 117 flow. Second operand 7 states. [2020-10-11 18:47:25,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 18:47:25,691 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 56 [2020-10-11 18:47:25,692 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 18:47:25,762 INFO L129 PetriNetUnfolder]: 1/55 cut-off events. [2020-10-11 18:47:25,763 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-11 18:47:25,763 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 60 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. [2020-10-11 18:47:25,764 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2020-10-11 18:47:25,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 44 transitions, 133 flow [2020-10-11 18:47:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 18:47:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-11 18:47:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 319 transitions. [2020-10-11 18:47:25,766 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8137755102040817 [2020-10-11 18:47:25,766 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 319 transitions. [2020-10-11 18:47:25,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 319 transitions. [2020-10-11 18:47:25,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 18:47:25,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 319 transitions. [2020-10-11 18:47:25,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-11 18:47:25,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-11 18:47:25,769 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-11 18:47:25,769 INFO L185 Difference]: Start difference. First operand has 62 places, 45 transitions, 117 flow. Second operand 7 states and 319 transitions. [2020-10-11 18:47:25,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 44 transitions, 133 flow [2020-10-11 18:47:25,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 126 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-11 18:47:25,770 INFO L241 Difference]: Finished difference. Result has 58 places, 0 transitions, 0 flow [2020-10-11 18:47:25,771 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} [2020-10-11 18:47:25,771 INFO L341 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2020-10-11 18:47:25,771 INFO L481 AbstractCegarLoop]: Abstraction has has 58 places, 0 transitions, 0 flow [2020-10-11 18:47:25,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 18:47:25,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 18:47:25,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 06:47:25 BasicIcfg [2020-10-11 18:47:25,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 18:47:25,780 INFO L168 Benchmark]: Toolchain (without parser) took 3798.81 ms. Allocated memory was 254.8 MB in the beginning and 376.4 MB in the end (delta: 121.6 MB). Free memory was 209.3 MB in the beginning and 299.0 MB in the end (delta: -89.6 MB). Peak memory consumption was 32.0 MB. Max. memory is 14.2 GB. [2020-10-11 18:47:25,780 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 254.8 MB. Free memory is still 231.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 18:47:25,781 INFO L168 Benchmark]: CACSL2BoogieTranslator took 712.29 ms. Allocated memory was 254.8 MB in the beginning and 325.1 MB in the end (delta: 70.3 MB). Free memory was 209.3 MB in the beginning and 275.9 MB in the end (delta: -66.6 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. [2020-10-11 18:47:25,782 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.24 ms. Allocated memory is still 325.1 MB. Free memory was 275.9 MB in the beginning and 273.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 18:47:25,783 INFO L168 Benchmark]: Boogie Preprocessor took 26.98 ms. Allocated memory is still 325.1 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 18:47:25,783 INFO L168 Benchmark]: RCFGBuilder took 407.20 ms. Allocated memory is still 325.1 MB. Free memory was 273.4 MB in the beginning and 251.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. [2020-10-11 18:47:25,784 INFO L168 Benchmark]: TraceAbstraction took 2598.21 ms. Allocated memory was 325.1 MB in the beginning and 376.4 MB in the end (delta: 51.4 MB). Free memory was 251.5 MB in the beginning and 299.0 MB in the end (delta: -47.4 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.2 GB. [2020-10-11 18:47:25,788 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 254.8 MB. Free memory is still 231.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 712.29 ms. Allocated memory was 254.8 MB in the beginning and 325.1 MB in the end (delta: 70.3 MB). Free memory was 209.3 MB in the beginning and 275.9 MB in the end (delta: -66.6 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.24 ms. Allocated memory is still 325.1 MB. Free memory was 275.9 MB in the beginning and 273.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.98 ms. Allocated memory is still 325.1 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 407.20 ms. Allocated memory is still 325.1 MB. Free memory was 273.4 MB in the beginning and 251.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2598.21 ms. Allocated memory was 325.1 MB in the beginning and 376.4 MB in the end (delta: 51.4 MB). Free memory was 251.5 MB in the beginning and 299.0 MB in the end (delta: -47.4 MB). Peak memory consumption was 3.9 MB. 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: 4, TraceHistogramMax: 1, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 98 SDslu, 304 SDs, 0 SdLazy, 275 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=2, 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, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 144 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 140 ConstructedInterpolants, 0 QuantifiedInterpolants, 13516 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...