/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/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 01:38:26,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 01:38:26,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 01:38:26,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 01:38:26,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 01:38:26,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 01:38:26,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 01:38:26,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 01:38:26,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 01:38:26,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 01:38:26,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 01:38:26,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 01:38:26,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 01:38:26,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 01:38:26,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 01:38:26,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 01:38:26,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 01:38:26,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 01:38:26,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 01:38:26,204 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 01:38:26,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 01:38:26,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 01:38:26,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 01:38:26,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 01:38:26,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 01:38:26,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 01:38:26,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 01:38:26,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 01:38:26,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 01:38:26,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 01:38:26,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 01:38:26,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 01:38:26,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 01:38:26,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 01:38:26,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 01:38:26,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 01:38:26,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-16 01:38:26,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 01:38:26,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 01:38:26,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 01:38:26,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 01:38:26,257 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 01:38:26,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 01:38:26,257 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 01:38:26,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 01:38:26,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 01:38:26,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 01:38:26,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 01:38:26,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 01:38:26,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 01:38:26,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 01:38:26,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 01:38:26,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 01:38:26,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 01:38:26,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 01:38:26,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 01:38:26,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 01:38:26,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 01:38:26,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 01:38:26,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 01:38:26,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 01:38:26,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 01:38:26,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 01:38:26,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 01:38:26,261 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 01:38:26,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 01:38:26,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 01:38:26,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 01:38:26,554 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 01:38:26,559 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 01:38:26,559 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 01:38:26,560 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.opt.i [2020-10-16 01:38:26,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23a9f8c6/b213d7e4287c4b68bf3b008a47c9f46f/FLAGfdb1c8ae9 [2020-10-16 01:38:27,088 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 01:38:27,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.opt.i [2020-10-16 01:38:27,105 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23a9f8c6/b213d7e4287c4b68bf3b008a47c9f46f/FLAGfdb1c8ae9 [2020-10-16 01:38:27,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23a9f8c6/b213d7e4287c4b68bf3b008a47c9f46f [2020-10-16 01:38:27,378 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 01:38:27,380 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 01:38:27,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 01:38:27,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 01:38:27,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 01:38:27,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:38:27" (1/1) ... [2020-10-16 01:38:27,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784c4695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:27, skipping insertion in model container [2020-10-16 01:38:27,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:38:27" (1/1) ... [2020-10-16 01:38:27,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 01:38:27,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 01:38:27,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:38:27,932 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 01:38:27,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:38:28,087 INFO L208 MainTranslator]: Completed translation [2020-10-16 01:38:28,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28 WrapperNode [2020-10-16 01:38:28,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 01:38:28,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 01:38:28,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 01:38:28,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 01:38:28,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (1/1) ... [2020-10-16 01:38:28,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (1/1) ... [2020-10-16 01:38:28,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 01:38:28,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 01:38:28,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 01:38:28,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 01:38:28,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (1/1) ... [2020-10-16 01:38:28,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (1/1) ... [2020-10-16 01:38:28,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (1/1) ... [2020-10-16 01:38:28,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (1/1) ... [2020-10-16 01:38:28,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (1/1) ... [2020-10-16 01:38:28,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (1/1) ... [2020-10-16 01:38:28,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (1/1) ... [2020-10-16 01:38:28,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 01:38:28,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 01:38:28,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 01:38:28,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 01:38:28,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (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 [2020-10-16 01:38:28,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 01:38:28,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 01:38:28,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 01:38:28,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 01:38:28,225 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-16 01:38:28,225 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-16 01:38:28,225 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-16 01:38:28,225 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-16 01:38:28,225 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-16 01:38:28,226 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-16 01:38:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 01:38:28,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 01:38:28,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 01:38:28,228 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 01:38:28,594 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 01:38:28,595 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 01:38:28,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:38:28 BoogieIcfgContainer [2020-10-16 01:38:28,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 01:38:28,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 01:38:28,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 01:38:28,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 01:38:28,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:38:27" (1/3) ... [2020-10-16 01:38:28,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a30e3b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:38:28, skipping insertion in model container [2020-10-16 01:38:28,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:38:28" (2/3) ... [2020-10-16 01:38:28,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a30e3b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:38:28, skipping insertion in model container [2020-10-16 01:38:28,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:38:28" (3/3) ... [2020-10-16 01:38:28,605 INFO L111 eAbstractionObserver]: Analyzing ICFG safe009_pso.opt.i [2020-10-16 01:38:28,616 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 01:38:28,623 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 01:38:28,624 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 01:38:28,650 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,650 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,650 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,650 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,651 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,651 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,652 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,652 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,652 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,652 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,653 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,653 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,653 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,654 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,654 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,654 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,654 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,655 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,658 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,658 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,658 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,659 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,668 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,668 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,669 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,669 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,671 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,671 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,671 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,672 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:38:28,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 01:38:28,708 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 01:38:28,709 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 01:38:28,709 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 01:38:28,709 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 01:38:28,709 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 01:38:28,709 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 01:38:28,709 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 01:38:28,709 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 01:38:28,721 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 76 places, 68 transitions, 151 flow [2020-10-16 01:38:28,757 INFO L129 PetriNetUnfolder]: 2/65 cut-off events. [2020-10-16 01:38:28,757 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:38:28,762 INFO L80 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 65 events. 2/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2020-10-16 01:38:28,762 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 68 transitions, 151 flow [2020-10-16 01:38:28,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 54 transitions, 117 flow [2020-10-16 01:38:28,769 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 01:38:28,772 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 54 transitions, 117 flow [2020-10-16 01:38:28,774 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 54 transitions, 117 flow [2020-10-16 01:38:28,774 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 63 places, 54 transitions, 117 flow [2020-10-16 01:38:28,792 INFO L129 PetriNetUnfolder]: 1/54 cut-off events. [2020-10-16 01:38:28,792 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:38:28,793 INFO L80 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 54 events. 1/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-16 01:38:28,795 INFO L117 LiptonReduction]: Number of co-enabled transitions 812 [2020-10-16 01:38:30,096 INFO L132 LiptonReduction]: Checked pairs total: 1359 [2020-10-16 01:38:30,096 INFO L134 LiptonReduction]: Total number of compositions: 42 [2020-10-16 01:38:30,099 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1330 [2020-10-16 01:38:30,106 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2020-10-16 01:38:30,107 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:38:30,107 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:38:30,108 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:38:30,108 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:38:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:38:30,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1913276470, now seen corresponding path program 1 times [2020-10-16 01:38:30,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:38:30,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747815314] [2020-10-16 01:38:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:38:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:38:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:38:30,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747815314] [2020-10-16 01:38:30,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:38:30,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 01:38:30,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715155212] [2020-10-16 01:38:30,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:38:30,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:38:30,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:38:30,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:38:30,352 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 110 [2020-10-16 01:38:30,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 43 flow. Second operand 3 states. [2020-10-16 01:38:30,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:38:30,356 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 110 [2020-10-16 01:38:30,357 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:38:30,380 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2020-10-16 01:38:30,381 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:38:30,381 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 16 events. 0/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2020-10-16 01:38:30,383 INFO L132 encePairwiseOnDemand]: 106/110 looper letters, 1 selfloop transitions, 2 changer transitions 0/16 dead transitions. [2020-10-16 01:38:30,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 16 transitions, 47 flow [2020-10-16 01:38:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:38:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:38:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2020-10-16 01:38:30,405 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8545454545454545 [2020-10-16 01:38:30,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2020-10-16 01:38:30,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2020-10-16 01:38:30,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:38:30,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2020-10-16 01:38:30,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:38:30,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:38:30,429 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:38:30,431 INFO L185 Difference]: Start difference. First operand has 26 places, 17 transitions, 43 flow. Second operand 3 states and 282 transitions. [2020-10-16 01:38:30,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 16 transitions, 47 flow [2020-10-16 01:38:30,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 16 transitions, 44 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-16 01:38:30,442 INFO L241 Difference]: Finished difference. Result has 26 places, 16 transitions, 46 flow [2020-10-16 01:38:30,445 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=26, PETRI_TRANSITIONS=16} [2020-10-16 01:38:30,446 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2020-10-16 01:38:30,446 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 16 transitions, 46 flow [2020-10-16 01:38:30,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:38:30,450 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:38:30,450 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:38:30,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 01:38:30,458 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:38:30,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:38:30,459 INFO L82 PathProgramCache]: Analyzing trace with hash 814043737, now seen corresponding path program 1 times [2020-10-16 01:38:30,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:38:30,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944517898] [2020-10-16 01:38:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:38:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:38:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:38:30,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944517898] [2020-10-16 01:38:30,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:38:30,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:38:30,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750500827] [2020-10-16 01:38:30,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:38:30,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:38:30,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:38:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:38:30,570 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 110 [2020-10-16 01:38:30,571 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 16 transitions, 46 flow. Second operand 4 states. [2020-10-16 01:38:30,571 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:38:30,571 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 110 [2020-10-16 01:38:30,571 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:38:30,601 INFO L129 PetriNetUnfolder]: 0/21 cut-off events. [2020-10-16 01:38:30,602 INFO L130 PetriNetUnfolder]: For 5/12 co-relation queries the response was YES. [2020-10-16 01:38:30,602 INFO L80 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 21 events. 0/21 cut-off events. For 5/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 48 event pairs, 0 based on Foata normal form. 2/23 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2020-10-16 01:38:30,602 INFO L132 encePairwiseOnDemand]: 106/110 looper letters, 1 selfloop transitions, 3 changer transitions 1/17 dead transitions. [2020-10-16 01:38:30,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 61 flow [2020-10-16 01:38:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:38:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:38:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 363 transitions. [2020-10-16 01:38:30,605 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.825 [2020-10-16 01:38:30,605 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 363 transitions. [2020-10-16 01:38:30,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 363 transitions. [2020-10-16 01:38:30,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:38:30,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 363 transitions. [2020-10-16 01:38:30,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:38:30,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:38:30,609 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:38:30,609 INFO L185 Difference]: Start difference. First operand has 26 places, 16 transitions, 46 flow. Second operand 4 states and 363 transitions. [2020-10-16 01:38:30,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 61 flow [2020-10-16 01:38:30,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 55 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 01:38:30,611 INFO L241 Difference]: Finished difference. Result has 29 places, 16 transitions, 56 flow [2020-10-16 01:38:30,611 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=16} [2020-10-16 01:38:30,612 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2020-10-16 01:38:30,612 INFO L481 AbstractCegarLoop]: Abstraction has has 29 places, 16 transitions, 56 flow [2020-10-16 01:38:30,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:38:30,612 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:38:30,612 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:38:30,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 01:38:30,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:38:30,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:38:30,613 INFO L82 PathProgramCache]: Analyzing trace with hash 91007350, now seen corresponding path program 1 times [2020-10-16 01:38:30,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:38:30,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600816045] [2020-10-16 01:38:30,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:38:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:38:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:38:30,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600816045] [2020-10-16 01:38:30,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:38:30,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:38:30,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950461254] [2020-10-16 01:38:30,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:38:30,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:38:30,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:38:30,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:38:30,664 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 110 [2020-10-16 01:38:30,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 16 transitions, 56 flow. Second operand 4 states. [2020-10-16 01:38:30,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:38:30,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 110 [2020-10-16 01:38:30,665 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:38:30,711 INFO L129 PetriNetUnfolder]: 2/30 cut-off events. [2020-10-16 01:38:30,712 INFO L130 PetriNetUnfolder]: For 36/40 co-relation queries the response was YES. [2020-10-16 01:38:30,715 INFO L80 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 30 events. 2/30 cut-off events. For 36/40 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 1 based on Foata normal form. 5/34 useless extension candidates. Maximal degree in co-relation 59. Up to 6 conditions per place. [2020-10-16 01:38:30,715 INFO L132 encePairwiseOnDemand]: 105/110 looper letters, 2 selfloop transitions, 3 changer transitions 4/20 dead transitions. [2020-10-16 01:38:30,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 82 flow [2020-10-16 01:38:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:38:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:38:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2020-10-16 01:38:30,718 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7886363636363637 [2020-10-16 01:38:30,718 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2020-10-16 01:38:30,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2020-10-16 01:38:30,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:38:30,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2020-10-16 01:38:30,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:38:30,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:38:30,723 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:38:30,723 INFO L185 Difference]: Start difference. First operand has 29 places, 16 transitions, 56 flow. Second operand 4 states and 347 transitions. [2020-10-16 01:38:30,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 82 flow [2020-10-16 01:38:30,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 70 flow, removed 2 selfloop flow, removed 4 redundant places. [2020-10-16 01:38:30,725 INFO L241 Difference]: Finished difference. Result has 30 places, 16 transitions, 60 flow [2020-10-16 01:38:30,725 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=30, PETRI_TRANSITIONS=16} [2020-10-16 01:38:30,725 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2020-10-16 01:38:30,725 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 16 transitions, 60 flow [2020-10-16 01:38:30,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:38:30,726 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:38:30,726 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:38:30,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 01:38:30,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:38:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:38:30,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1731402035, now seen corresponding path program 1 times [2020-10-16 01:38:30,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:38:30,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955683964] [2020-10-16 01:38:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:38:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:38:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:38:30,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955683964] [2020-10-16 01:38:30,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:38:30,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:38:30,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435380897] [2020-10-16 01:38:30,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:38:30,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:38:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:38:30,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:38:30,843 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 110 [2020-10-16 01:38:30,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 16 transitions, 60 flow. Second operand 4 states. [2020-10-16 01:38:30,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:38:30,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 110 [2020-10-16 01:38:30,844 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:38:30,894 INFO L129 PetriNetUnfolder]: 31/74 cut-off events. [2020-10-16 01:38:30,894 INFO L130 PetriNetUnfolder]: For 118/149 co-relation queries the response was YES. [2020-10-16 01:38:30,895 INFO L80 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 74 events. 31/74 cut-off events. For 118/149 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 223 event pairs, 15 based on Foata normal form. 12/79 useless extension candidates. Maximal degree in co-relation 176. Up to 48 conditions per place. [2020-10-16 01:38:30,896 INFO L132 encePairwiseOnDemand]: 104/110 looper letters, 5 selfloop transitions, 4 changer transitions 7/26 dead transitions. [2020-10-16 01:38:30,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 112 flow [2020-10-16 01:38:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 01:38:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 01:38:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 413 transitions. [2020-10-16 01:38:30,898 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7509090909090909 [2020-10-16 01:38:30,899 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 413 transitions. [2020-10-16 01:38:30,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 413 transitions. [2020-10-16 01:38:30,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:38:30,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 413 transitions. [2020-10-16 01:38:30,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 01:38:30,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 01:38:30,901 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 01:38:30,902 INFO L185 Difference]: Start difference. First operand has 30 places, 16 transitions, 60 flow. Second operand 5 states and 413 transitions. [2020-10-16 01:38:30,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 112 flow [2020-10-16 01:38:30,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 100 flow, removed 1 selfloop flow, removed 5 redundant places. [2020-10-16 01:38:30,904 INFO L241 Difference]: Finished difference. Result has 32 places, 19 transitions, 84 flow [2020-10-16 01:38:30,904 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=19} [2020-10-16 01:38:30,904 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2020-10-16 01:38:30,904 INFO L481 AbstractCegarLoop]: Abstraction has has 32 places, 19 transitions, 84 flow [2020-10-16 01:38:30,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:38:30,905 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:38:30,905 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:38:30,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 01:38:30,905 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:38:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:38:30,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1690788852, now seen corresponding path program 1 times [2020-10-16 01:38:30,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:38:30,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318064844] [2020-10-16 01:38:30,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:38:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:38:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:38:30,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318064844] [2020-10-16 01:38:30,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:38:30,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:38:30,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841765198] [2020-10-16 01:38:30,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 01:38:30,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:38:30,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 01:38:30,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 01:38:30,961 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 110 [2020-10-16 01:38:30,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 19 transitions, 84 flow. Second operand 5 states. [2020-10-16 01:38:30,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:38:30,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 110 [2020-10-16 01:38:30,962 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:38:31,017 INFO L129 PetriNetUnfolder]: 17/51 cut-off events. [2020-10-16 01:38:31,017 INFO L130 PetriNetUnfolder]: For 156/212 co-relation queries the response was YES. [2020-10-16 01:38:31,018 INFO L80 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 51 events. 17/51 cut-off events. For 156/212 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 122 event pairs, 3 based on Foata normal form. 19/67 useless extension candidates. Maximal degree in co-relation 178. Up to 35 conditions per place. [2020-10-16 01:38:31,018 INFO L132 encePairwiseOnDemand]: 104/110 looper letters, 5 selfloop transitions, 7 changer transitions 7/29 dead transitions. [2020-10-16 01:38:31,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 180 flow [2020-10-16 01:38:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 01:38:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 01:38:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 495 transitions. [2020-10-16 01:38:31,021 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.75 [2020-10-16 01:38:31,021 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 495 transitions. [2020-10-16 01:38:31,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 495 transitions. [2020-10-16 01:38:31,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:38:31,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 495 transitions. [2020-10-16 01:38:31,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 01:38:31,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 01:38:31,024 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 01:38:31,024 INFO L185 Difference]: Start difference. First operand has 32 places, 19 transitions, 84 flow. Second operand 6 states and 495 transitions. [2020-10-16 01:38:31,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 180 flow [2020-10-16 01:38:31,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 174 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 01:38:31,027 INFO L241 Difference]: Finished difference. Result has 36 places, 22 transitions, 134 flow [2020-10-16 01:38:31,027 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=36, PETRI_TRANSITIONS=22} [2020-10-16 01:38:31,027 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2020-10-16 01:38:31,028 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 22 transitions, 134 flow [2020-10-16 01:38:31,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 01:38:31,028 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:38:31,028 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:38:31,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 01:38:31,028 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:38:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:38:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1724985808, now seen corresponding path program 1 times [2020-10-16 01:38:31,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:38:31,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396465825] [2020-10-16 01:38:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:38:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:38:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:38:31,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396465825] [2020-10-16 01:38:31,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:38:31,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 01:38:31,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918994113] [2020-10-16 01:38:31,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 01:38:31,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:38:31,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 01:38:31,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 01:38:31,085 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 110 [2020-10-16 01:38:31,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 22 transitions, 134 flow. Second operand 6 states. [2020-10-16 01:38:31,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:38:31,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 110 [2020-10-16 01:38:31,086 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:38:31,138 INFO L129 PetriNetUnfolder]: 7/31 cut-off events. [2020-10-16 01:38:31,139 INFO L130 PetriNetUnfolder]: For 138/181 co-relation queries the response was YES. [2020-10-16 01:38:31,139 INFO L80 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 31 events. 7/31 cut-off events. For 138/181 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 38 event pairs, 0 based on Foata normal form. 14/44 useless extension candidates. Maximal degree in co-relation 124. Up to 20 conditions per place. [2020-10-16 01:38:31,140 INFO L132 encePairwiseOnDemand]: 104/110 looper letters, 2 selfloop transitions, 10 changer transitions 4/26 dead transitions. [2020-10-16 01:38:31,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 26 transitions, 202 flow [2020-10-16 01:38:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 01:38:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 01:38:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 571 transitions. [2020-10-16 01:38:31,143 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7415584415584415 [2020-10-16 01:38:31,143 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 571 transitions. [2020-10-16 01:38:31,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 571 transitions. [2020-10-16 01:38:31,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:38:31,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 571 transitions. [2020-10-16 01:38:31,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 01:38:31,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 01:38:31,146 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 01:38:31,146 INFO L185 Difference]: Start difference. First operand has 36 places, 22 transitions, 134 flow. Second operand 7 states and 571 transitions. [2020-10-16 01:38:31,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 26 transitions, 202 flow [2020-10-16 01:38:31,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 164 flow, removed 15 selfloop flow, removed 4 redundant places. [2020-10-16 01:38:31,149 INFO L241 Difference]: Finished difference. Result has 39 places, 22 transitions, 134 flow [2020-10-16 01:38:31,150 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=134, PETRI_PLACES=39, PETRI_TRANSITIONS=22} [2020-10-16 01:38:31,150 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 13 predicate places. [2020-10-16 01:38:31,150 INFO L481 AbstractCegarLoop]: Abstraction has has 39 places, 22 transitions, 134 flow [2020-10-16 01:38:31,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 01:38:31,150 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:38:31,150 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:38:31,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 01:38:31,151 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:38:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:38:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1030437260, now seen corresponding path program 1 times [2020-10-16 01:38:31,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:38:31,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049501299] [2020-10-16 01:38:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:38:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:38:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 01:38:31,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049501299] [2020-10-16 01:38:31,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:38:31,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:38:31,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588087825] [2020-10-16 01:38:31,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:38:31,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:38:31,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:38:31,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:38:31,178 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 110 [2020-10-16 01:38:31,178 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 22 transitions, 134 flow. Second operand 3 states. [2020-10-16 01:38:31,178 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:38:31,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 110 [2020-10-16 01:38:31,178 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:38:31,186 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2020-10-16 01:38:31,186 INFO L130 PetriNetUnfolder]: For 50/55 co-relation queries the response was YES. [2020-10-16 01:38:31,187 INFO L80 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 24 events. 5/24 cut-off events. For 50/55 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 77. Up to 11 conditions per place. [2020-10-16 01:38:31,187 INFO L132 encePairwiseOnDemand]: 108/110 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2020-10-16 01:38:31,187 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 21 transitions, 130 flow [2020-10-16 01:38:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:38:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:38:31,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2020-10-16 01:38:31,189 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8151515151515152 [2020-10-16 01:38:31,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2020-10-16 01:38:31,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2020-10-16 01:38:31,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:38:31,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2020-10-16 01:38:31,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:38:31,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:38:31,191 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:38:31,191 INFO L185 Difference]: Start difference. First operand has 39 places, 22 transitions, 134 flow. Second operand 3 states and 269 transitions. [2020-10-16 01:38:31,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 21 transitions, 130 flow [2020-10-16 01:38:31,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 21 transitions, 94 flow, removed 9 selfloop flow, removed 6 redundant places. [2020-10-16 01:38:31,193 INFO L241 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2020-10-16 01:38:31,193 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2020-10-16 01:38:31,193 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2020-10-16 01:38:31,193 INFO L481 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2020-10-16 01:38:31,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:38:31,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 01:38:31,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 01:38:31 BasicIcfg [2020-10-16 01:38:31,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 01:38:31,201 INFO L168 Benchmark]: Toolchain (without parser) took 3820.38 ms. Allocated memory was 254.8 MB in the beginning and 377.0 MB in the end (delta: 122.2 MB). Free memory was 209.7 MB in the beginning and 271.8 MB in the end (delta: -62.0 MB). Peak memory consumption was 60.1 MB. Max. memory is 14.2 GB. [2020-10-16 01:38:31,201 INFO L168 Benchmark]: CDTParser took 0.36 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. [2020-10-16 01:38:31,202 INFO L168 Benchmark]: CACSL2BoogieTranslator took 708.39 ms. Allocated memory was 254.8 MB in the beginning and 325.1 MB in the end (delta: 70.3 MB). Free memory was 209.7 MB in the beginning and 280.3 MB in the end (delta: -70.6 MB). Peak memory consumption was 33.1 MB. Max. memory is 14.2 GB. [2020-10-16 01:38:31,203 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.06 ms. Allocated memory is still 325.1 MB. Free memory was 280.3 MB in the beginning and 277.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:38:31,204 INFO L168 Benchmark]: Boogie Preprocessor took 22.72 ms. Allocated memory is still 325.1 MB. Free memory was 277.8 MB in the beginning and 275.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:38:31,205 INFO L168 Benchmark]: RCFGBuilder took 438.91 ms. Allocated memory is still 325.1 MB. Free memory was 275.3 MB in the beginning and 253.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-16 01:38:31,205 INFO L168 Benchmark]: TraceAbstraction took 2599.93 ms. Allocated memory was 325.1 MB in the beginning and 377.0 MB in the end (delta: 51.9 MB). Free memory was 253.4 MB in the beginning and 271.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 33.6 MB. Max. memory is 14.2 GB. [2020-10-16 01:38:31,209 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 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 708.39 ms. Allocated memory was 254.8 MB in the beginning and 325.1 MB in the end (delta: 70.3 MB). Free memory was 209.7 MB in the beginning and 280.3 MB in the end (delta: -70.6 MB). Peak memory consumption was 33.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 45.06 ms. Allocated memory is still 325.1 MB. Free memory was 280.3 MB in the beginning and 277.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 22.72 ms. Allocated memory is still 325.1 MB. Free memory was 277.8 MB in the beginning and 275.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 438.91 ms. Allocated memory is still 325.1 MB. Free memory was 275.3 MB in the beginning and 253.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2599.93 ms. Allocated memory was 325.1 MB in the beginning and 377.0 MB in the end (delta: 51.9 MB). Free memory was 253.4 MB in the beginning and 271.8 MB in the end (delta: -18.3 MB). Peak memory consumption was 33.6 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 560 VarBasedMoverChecksPositive, 45 VarBasedMoverChecksNegative, 11 SemBasedMoverChecksPositive, 34 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 72 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 63 PlacesBefore, 26 PlacesAfterwards, 54 TransitionsBefore, 17 TransitionsAfterwards, 812 CoEnabledTransitionPairs, 5 FixpointIterations, 13 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 0 ChoiceCompositions, 42 TotalNumberOfCompositions, 1359 MoverChecksTotal - 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 4 procedures, 67 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: 7, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 25 SDtfs, 14 SDslu, 14 SDs, 0 SdLazy, 111 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=5, 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, 0.3s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 2604 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...