/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/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 19:24:15,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 19:24:15,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 19:24:15,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 19:24:15,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 19:24:15,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 19:24:15,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 19:24:15,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 19:24:15,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 19:24:15,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 19:24:15,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 19:24:15,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 19:24:15,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 19:24:15,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 19:24:15,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 19:24:15,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 19:24:15,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 19:24:15,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 19:24:15,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 19:24:15,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 19:24:15,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 19:24:15,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 19:24:15,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 19:24:15,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 19:24:15,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 19:24:15,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 19:24:15,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 19:24:15,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 19:24:15,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 19:24:15,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 19:24:15,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 19:24:15,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 19:24:15,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 19:24:15,151 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 19:24:15,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 19:24:15,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 19:24:15,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 19:24:15,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 19:24:15,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 19:24:15,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 19:24:15,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 19:24:15,201 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 19:24:15,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 19:24:15,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 19:24:15,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 19:24:15,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 19:24:15,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 19:24:15,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 19:24:15,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 19:24:15,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 19:24:15,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 19:24:15,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 19:24:15,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 19:24:15,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 19:24:15,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 19:24:15,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 19:24:15,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 19:24:15,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 19:24:15,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 19:24:15,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 19:24:15,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 19:24:15,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 19:24:15,207 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 19:24:15,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 19:24:15,207 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 19:24:15,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 19:24:15,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 19:24:15,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 19:24:15,504 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 19:24:15,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 19:24:15,509 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 19:24:15,510 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 19:24:15,510 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-09 19:24:15,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905c38223/cf33d09e2129420bbe34e6b358d3f222/FLAG1ecf51a58 [2020-10-09 19:24:16,034 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 19:24:16,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-09 19:24:16,036 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-09 19:24:16,036 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-09 19:24:16,036 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-09 19:24:16,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905c38223/cf33d09e2129420bbe34e6b358d3f222/FLAG1ecf51a58 [2020-10-09 19:24:16,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/905c38223/cf33d09e2129420bbe34e6b358d3f222 [2020-10-09 19:24:16,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 19:24:16,422 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 19:24:16,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 19:24:16,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 19:24:16,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 19:24:16,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc63bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16, skipping insertion in model container [2020-10-09 19:24:16,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 19:24:16,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 19:24:16,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 19:24:16,635 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 19:24:16,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 19:24:16,749 INFO L208 MainTranslator]: Completed translation [2020-10-09 19:24:16,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16 WrapperNode [2020-10-09 19:24:16,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 19:24:16,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 19:24:16,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 19:24:16,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 19:24:16,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 19:24:16,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 19:24:16,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 19:24:16,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 19:24:16,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... [2020-10-09 19:24:16,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 19:24:16,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 19:24:16,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 19:24:16,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 19:24:16,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 19:24:16,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 19:24:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 19:24:16,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 19:24:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 19:24:16,874 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-09 19:24:16,874 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-09 19:24:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-09 19:24:16,875 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-09 19:24:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 19:24:16,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 19:24:16,877 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 19:24:17,120 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 19:24:17,120 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 19:24:17,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 07:24:17 BoogieIcfgContainer [2020-10-09 19:24:17,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 19:24:17,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 19:24:17,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 19:24:17,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 19:24:17,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 07:24:16" (1/3) ... [2020-10-09 19:24:17,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1011e8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 07:24:17, skipping insertion in model container [2020-10-09 19:24:17,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:24:16" (2/3) ... [2020-10-09 19:24:17,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1011e8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 07:24:17, skipping insertion in model container [2020-10-09 19:24:17,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 07:24:17" (3/3) ... [2020-10-09 19:24:17,134 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-09 19:24:17,149 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 19:24:17,158 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 19:24:17,160 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 19:24:17,190 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,191 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,191 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,192 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,192 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,192 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,193 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,193 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,194 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,194 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,194 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,195 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,195 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,195 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,196 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,196 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,196 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,197 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,197 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,197 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,198 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,198 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,202 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,202 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,202 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,202 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,203 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,207 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,207 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,208 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,208 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,208 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:24:17,235 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 19:24:17,257 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:24:17,257 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:24:17,257 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:24:17,258 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:24:17,258 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:24:17,258 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:24:17,258 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:24:17,258 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:24:17,273 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-09 19:24:17,362 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-09 19:24:17,362 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 19:24:17,370 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 56 events. 5/56 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2020-10-09 19:24:17,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 56 transitions, 134 flow [2020-10-09 19:24:17,378 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 46 transitions, 110 flow [2020-10-09 19:24:17,395 INFO L129 PetriNetUnfolder]: 5/47 cut-off events. [2020-10-09 19:24:17,396 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 19:24:17,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:17,397 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] [2020-10-09 19:24:17,398 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:17,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2003973694, now seen corresponding path program 1 times [2020-10-09 19:24:17,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:17,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255941150] [2020-10-09 19:24:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:24:17,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-09 19:24:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:17,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:17,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255941150] [2020-10-09 19:24:17,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:24:17,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-09 19:24:17,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487120728] [2020-10-09 19:24:17,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-09 19:24:17,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:17,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-09 19:24:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-09 19:24:17,579 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 56 [2020-10-09 19:24:17,581 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 110 flow. Second operand 2 states. [2020-10-09 19:24:17,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:17,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 56 [2020-10-09 19:24:17,583 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:17,607 INFO L129 PetriNetUnfolder]: 3/46 cut-off events. [2020-10-09 19:24:17,607 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 19:24:17,608 INFO L80 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 46 events. 3/46 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 54. Up to 3 conditions per place. [2020-10-09 19:24:17,610 INFO L132 encePairwiseOnDemand]: 54/56 looper letters, 0 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2020-10-09 19:24:17,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 106 flow [2020-10-09 19:24:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-09 19:24:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-09 19:24:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 110 transitions. [2020-10-09 19:24:17,627 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9821428571428571 [2020-10-09 19:24:17,627 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 110 transitions. [2020-10-09 19:24:17,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 110 transitions. [2020-10-09 19:24:17,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:17,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 110 transitions. [2020-10-09 19:24:17,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-09 19:24:17,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-09 19:24:17,641 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-09 19:24:17,643 INFO L185 Difference]: Start difference. First operand has 47 places, 46 transitions, 110 flow. Second operand 2 states and 110 transitions. [2020-10-09 19:24:17,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 106 flow [2020-10-09 19:24:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-09 19:24:17,652 INFO L241 Difference]: Finished difference. Result has 44 places, 44 transitions, 94 flow [2020-10-09 19:24:17,655 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2020-10-09 19:24:17,656 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2020-10-09 19:24:17,656 INFO L481 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 94 flow [2020-10-09 19:24:17,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-09 19:24:17,657 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:17,657 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] [2020-10-09 19:24:17,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 19:24:17,869 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:17,870 INFO L82 PathProgramCache]: Analyzing trace with hash -649740476, now seen corresponding path program 1 times [2020-10-09 19:24:17,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:17,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252994446] [2020-10-09 19:24:17,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:24:17,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 19:24:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:17,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:18,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252994446] [2020-10-09 19:24:18,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:24:18,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 19:24:18,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384118550] [2020-10-09 19:24:18,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 19:24:18,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:18,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 19:24:18,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 19:24:18,061 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 56 [2020-10-09 19:24:18,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 94 flow. Second operand 4 states. [2020-10-09 19:24:18,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:18,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 56 [2020-10-09 19:24:18,062 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:18,094 INFO L129 PetriNetUnfolder]: 3/51 cut-off events. [2020-10-09 19:24:18,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 19:24:18,095 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 51 events. 3/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 60. Up to 5 conditions per place. [2020-10-09 19:24:18,096 INFO L132 encePairwiseOnDemand]: 52/56 looper letters, 3 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2020-10-09 19:24:18,096 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 112 flow [2020-10-09 19:24:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 19:24:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 19:24:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2020-10-09 19:24:18,100 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9107142857142857 [2020-10-09 19:24:18,100 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 204 transitions. [2020-10-09 19:24:18,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 204 transitions. [2020-10-09 19:24:18,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:18,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 204 transitions. [2020-10-09 19:24:18,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 19:24:18,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 19:24:18,105 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 19:24:18,106 INFO L185 Difference]: Start difference. First operand has 44 places, 44 transitions, 94 flow. Second operand 4 states and 204 transitions. [2020-10-09 19:24:18,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 112 flow [2020-10-09 19:24:18,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:24:18,111 INFO L241 Difference]: Finished difference. Result has 49 places, 46 transitions, 116 flow [2020-10-09 19:24:18,111 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2020-10-09 19:24:18,112 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2020-10-09 19:24:18,112 INFO L481 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 116 flow [2020-10-09 19:24:18,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 19:24:18,112 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:18,113 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] [2020-10-09 19:24:18,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 19:24:18,325 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2099276824, now seen corresponding path program 1 times [2020-10-09 19:24:18,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:18,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822581437] [2020-10-09 19:24:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:24:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-09 19:24:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:18,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:18,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822581437] [2020-10-09 19:24:18,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:24:18,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-09 19:24:18,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675306323] [2020-10-09 19:24:18,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 19:24:18,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:18,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 19:24:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 19:24:18,472 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 56 [2020-10-09 19:24:18,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 116 flow. Second operand 4 states. [2020-10-09 19:24:18,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:18,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 56 [2020-10-09 19:24:18,473 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:18,497 INFO L129 PetriNetUnfolder]: 3/56 cut-off events. [2020-10-09 19:24:18,497 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-09 19:24:18,498 INFO L80 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 56 events. 3/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 74. Up to 5 conditions per place. [2020-10-09 19:24:18,499 INFO L132 encePairwiseOnDemand]: 52/56 looper letters, 3 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2020-10-09 19:24:18,499 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 134 flow [2020-10-09 19:24:18,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 19:24:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-09 19:24:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2020-10-09 19:24:18,503 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9107142857142857 [2020-10-09 19:24:18,503 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 204 transitions. [2020-10-09 19:24:18,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 204 transitions. [2020-10-09 19:24:18,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:18,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 204 transitions. [2020-10-09 19:24:18,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-09 19:24:18,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-09 19:24:18,507 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-09 19:24:18,507 INFO L185 Difference]: Start difference. First operand has 49 places, 46 transitions, 116 flow. Second operand 4 states and 204 transitions. [2020-10-09 19:24:18,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 134 flow [2020-10-09 19:24:18,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:24:18,511 INFO L241 Difference]: Finished difference. Result has 54 places, 48 transitions, 138 flow [2020-10-09 19:24:18,511 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2020-10-09 19:24:18,511 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2020-10-09 19:24:18,511 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 138 flow [2020-10-09 19:24:18,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 19:24:18,512 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:18,512 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:24:18,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 19:24:18,725 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash 932178140, now seen corresponding path program 1 times [2020-10-09 19:24:18,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:18,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309888044] [2020-10-09 19:24:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:24:18,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 19:24:18,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:18,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:18,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309888044] [2020-10-09 19:24:18,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [113292454] [2020-10-09 19:24:18,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:24:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:24:18,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 19:24:18,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:18,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:18,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145375107] [2020-10-09 19:24:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:24:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:24:19,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 19:24:19,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:19,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:19,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:24:19,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-10-09 19:24:19,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162556190] [2020-10-09 19:24:19,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 19:24:19,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 19:24:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-09 19:24:19,108 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 56 [2020-10-09 19:24:19,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 138 flow. Second operand 8 states. [2020-10-09 19:24:19,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:19,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 56 [2020-10-09 19:24:19,109 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:19,191 INFO L129 PetriNetUnfolder]: 3/64 cut-off events. [2020-10-09 19:24:19,191 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2020-10-09 19:24:19,192 INFO L80 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 64 events. 3/64 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 2/66 useless extension candidates. Maximal degree in co-relation 105. Up to 5 conditions per place. [2020-10-09 19:24:19,193 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 7 selfloop transitions, 9 changer transitions 0/55 dead transitions. [2020-10-09 19:24:19,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 193 flow [2020-10-09 19:24:19,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 19:24:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 19:24:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 441 transitions. [2020-10-09 19:24:19,198 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.875 [2020-10-09 19:24:19,198 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 441 transitions. [2020-10-09 19:24:19,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 441 transitions. [2020-10-09 19:24:19,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:19,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 441 transitions. [2020-10-09 19:24:19,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 19:24:19,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 19:24:19,203 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 19:24:19,203 INFO L185 Difference]: Start difference. First operand has 54 places, 48 transitions, 138 flow. Second operand 9 states and 441 transitions. [2020-10-09 19:24:19,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 193 flow [2020-10-09 19:24:19,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-09 19:24:19,206 INFO L241 Difference]: Finished difference. Result has 65 places, 54 transitions, 192 flow [2020-10-09 19:24:19,207 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=192, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2020-10-09 19:24:19,207 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2020-10-09 19:24:19,207 INFO L481 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 192 flow [2020-10-09 19:24:19,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 19:24:19,208 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:19,208 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:24:19,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:24:19,830 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash 481769444, now seen corresponding path program 1 times [2020-10-09 19:24:19,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:19,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040236308] [2020-10-09 19:24:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:24:19,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 19:24:19,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:20,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:20,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040236308] [2020-10-09 19:24:20,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2002837881] [2020-10-09 19:24:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:24:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:24:20,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 19:24:20,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:20,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:20,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449092783] [2020-10-09 19:24:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:24:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:24:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 19:24:20,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:20,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 19:24:20,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:24:20,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 11 [2020-10-09 19:24:20,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970008122] [2020-10-09 19:24:20,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 19:24:20,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:20,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 19:24:20,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-09 19:24:20,551 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 56 [2020-10-09 19:24:20,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 192 flow. Second operand 11 states. [2020-10-09 19:24:20,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:20,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 56 [2020-10-09 19:24:20,552 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:20,681 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2020-10-09 19:24:20,681 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2020-10-09 19:24:20,683 INFO L80 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 76 events. 3/76 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 2/78 useless extension candidates. Maximal degree in co-relation 162. Up to 7 conditions per place. [2020-10-09 19:24:20,684 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 9 selfloop transitions, 15 changer transitions 0/63 dead transitions. [2020-10-09 19:24:20,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 63 transitions, 299 flow [2020-10-09 19:24:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 19:24:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-09 19:24:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 731 transitions. [2020-10-09 19:24:20,687 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8702380952380953 [2020-10-09 19:24:20,687 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 731 transitions. [2020-10-09 19:24:20,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 731 transitions. [2020-10-09 19:24:20,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:20,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 731 transitions. [2020-10-09 19:24:20,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-09 19:24:20,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-09 19:24:20,693 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-09 19:24:20,693 INFO L185 Difference]: Start difference. First operand has 65 places, 54 transitions, 192 flow. Second operand 15 states and 731 transitions. [2020-10-09 19:24:20,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 63 transitions, 299 flow [2020-10-09 19:24:20,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 63 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 19:24:20,697 INFO L241 Difference]: Finished difference. Result has 81 places, 61 transitions, 281 flow [2020-10-09 19:24:20,698 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=281, PETRI_PLACES=81, PETRI_TRANSITIONS=61} [2020-10-09 19:24:20,698 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 34 predicate places. [2020-10-09 19:24:20,698 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 61 transitions, 281 flow [2020-10-09 19:24:20,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 19:24:20,698 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:20,699 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:24:21,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:24:21,302 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -742591460, now seen corresponding path program 2 times [2020-10-09 19:24:21,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:21,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380507786] [2020-10-09 19:24:21,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:21,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 19:24:21,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:21,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 19:24:21,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:21,397 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-09 19:24:21,398 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 19:24:21,405 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 19:24:21,405 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-09 19:24:21,406 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-10-09 19:24:21,434 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-09 19:24:21,435 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-09 19:24:21,439 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-09 19:24:21,440 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-09 19:24:21,440 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-10-09 19:24:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-09 19:24:21,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-09 19:24:21,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380507786] [2020-10-09 19:24:21,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:24:21,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2020-10-09 19:24:21,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119412792] [2020-10-09 19:24:21,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-09 19:24:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-09 19:24:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-09 19:24:21,739 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 56 [2020-10-09 19:24:21,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 61 transitions, 281 flow. Second operand 7 states. [2020-10-09 19:24:21,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:21,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 56 [2020-10-09 19:24:21,740 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:21,770 INFO L129 PetriNetUnfolder]: 2/75 cut-off events. [2020-10-09 19:24:21,771 INFO L130 PetriNetUnfolder]: For 49/51 co-relation queries the response was YES. [2020-10-09 19:24:21,772 INFO L80 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 75 events. 2/75 cut-off events. For 49/51 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 3/78 useless extension candidates. Maximal degree in co-relation 169. Up to 7 conditions per place. [2020-10-09 19:24:21,773 INFO L132 encePairwiseOnDemand]: 51/56 looper letters, 3 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2020-10-09 19:24:21,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 60 transitions, 292 flow [2020-10-09 19:24:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 19:24:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-09 19:24:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2020-10-09 19:24:21,775 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8321428571428572 [2020-10-09 19:24:21,775 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 233 transitions. [2020-10-09 19:24:21,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 233 transitions. [2020-10-09 19:24:21,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:21,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 233 transitions. [2020-10-09 19:24:21,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-09 19:24:21,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-09 19:24:21,777 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-09 19:24:21,777 INFO L185 Difference]: Start difference. First operand has 81 places, 61 transitions, 281 flow. Second operand 5 states and 233 transitions. [2020-10-09 19:24:21,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 60 transitions, 292 flow [2020-10-09 19:24:21,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 60 transitions, 272 flow, removed 4 selfloop flow, removed 6 redundant places. [2020-10-09 19:24:21,783 INFO L241 Difference]: Finished difference. Result has 79 places, 60 transitions, 266 flow [2020-10-09 19:24:21,783 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2020-10-09 19:24:21,783 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2020-10-09 19:24:21,784 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 266 flow [2020-10-09 19:24:21,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-09 19:24:21,784 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:21,784 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:24:21,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-10-09 19:24:21,996 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1861188532, now seen corresponding path program 2 times [2020-10-09 19:24:21,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:21,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008589305] [2020-10-09 19:24:21,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:22,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 19:24:22,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:22,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 19:24:22,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:22,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:22,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008589305] [2020-10-09 19:24:22,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:24:22,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 14] imperfect sequences [] total 23 [2020-10-09 19:24:22,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162682477] [2020-10-09 19:24:22,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 19:24:22,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:22,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 19:24:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-10-09 19:24:22,488 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-09 19:24:22,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 266 flow. Second operand 24 states. [2020-10-09 19:24:22,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:22,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-09 19:24:22,489 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:23,399 INFO L129 PetriNetUnfolder]: 245/1346 cut-off events. [2020-10-09 19:24:23,399 INFO L130 PetriNetUnfolder]: For 911/911 co-relation queries the response was YES. [2020-10-09 19:24:23,411 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3112 conditions, 1346 events. 245/1346 cut-off events. For 911/911 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 10294 event pairs, 22 based on Foata normal form. 9/1349 useless extension candidates. Maximal degree in co-relation 3098. Up to 128 conditions per place. [2020-10-09 19:24:23,416 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 28 selfloop transitions, 32 changer transitions 74/183 dead transitions. [2020-10-09 19:24:23,416 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 183 transitions, 790 flow [2020-10-09 19:24:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 19:24:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-09 19:24:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1487 transitions. [2020-10-09 19:24:23,423 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8297991071428571 [2020-10-09 19:24:23,423 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1487 transitions. [2020-10-09 19:24:23,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1487 transitions. [2020-10-09 19:24:23,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:23,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1487 transitions. [2020-10-09 19:24:23,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-09 19:24:23,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-09 19:24:23,435 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-09 19:24:23,435 INFO L185 Difference]: Start difference. First operand has 79 places, 60 transitions, 266 flow. Second operand 32 states and 1487 transitions. [2020-10-09 19:24:23,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 183 transitions, 790 flow [2020-10-09 19:24:23,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 183 transitions, 782 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-09 19:24:23,451 INFO L241 Difference]: Finished difference. Result has 123 places, 98 transitions, 487 flow [2020-10-09 19:24:23,452 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=487, PETRI_PLACES=123, PETRI_TRANSITIONS=98} [2020-10-09 19:24:23,452 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 76 predicate places. [2020-10-09 19:24:23,452 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 98 transitions, 487 flow [2020-10-09 19:24:23,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 19:24:23,453 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:23,453 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:24:23,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-10-09 19:24:23,657 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2034435482, now seen corresponding path program 3 times [2020-10-09 19:24:23,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:23,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892161093] [2020-10-09 19:24:23,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:23,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 19:24:23,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:23,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 19:24:23,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:23,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:23,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892161093] [2020-10-09 19:24:23,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [640851932] [2020-10-09 19:24:23,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:24:23,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 19:24:23,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:23,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 19:24:23,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:23,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:23,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908527] [2020-10-09 19:24:23,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:24:23,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 19:24:23,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:23,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 19:24:23,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:23,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:23,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:24:23,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2020-10-09 19:24:23,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476734753] [2020-10-09 19:24:23,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 19:24:23,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 19:24:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-09 19:24:23,951 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 56 [2020-10-09 19:24:23,952 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 98 transitions, 487 flow. Second operand 8 states. [2020-10-09 19:24:23,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:23,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 56 [2020-10-09 19:24:23,952 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:24,117 INFO L129 PetriNetUnfolder]: 98/721 cut-off events. [2020-10-09 19:24:24,117 INFO L130 PetriNetUnfolder]: For 1730/1731 co-relation queries the response was YES. [2020-10-09 19:24:24,124 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2207 conditions, 721 events. 98/721 cut-off events. For 1730/1731 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4433 event pairs, 18 based on Foata normal form. 24/740 useless extension candidates. Maximal degree in co-relation 2176. Up to 77 conditions per place. [2020-10-09 19:24:24,127 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 7 selfloop transitions, 9 changer transitions 0/105 dead transitions. [2020-10-09 19:24:24,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 105 transitions, 542 flow [2020-10-09 19:24:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 19:24:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 19:24:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 441 transitions. [2020-10-09 19:24:24,130 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.875 [2020-10-09 19:24:24,130 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 441 transitions. [2020-10-09 19:24:24,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 441 transitions. [2020-10-09 19:24:24,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:24,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 441 transitions. [2020-10-09 19:24:24,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 19:24:24,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 19:24:24,133 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 19:24:24,133 INFO L185 Difference]: Start difference. First operand has 123 places, 98 transitions, 487 flow. Second operand 9 states and 441 transitions. [2020-10-09 19:24:24,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 105 transitions, 542 flow [2020-10-09 19:24:24,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 105 transitions, 524 flow, removed 9 selfloop flow, removed 8 redundant places. [2020-10-09 19:24:24,143 INFO L241 Difference]: Finished difference. Result has 112 places, 104 transitions, 523 flow [2020-10-09 19:24:24,144 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=523, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2020-10-09 19:24:24,144 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 65 predicate places. [2020-10-09 19:24:24,144 INFO L481 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 523 flow [2020-10-09 19:24:24,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 19:24:24,144 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:24,144 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:24:24,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3,14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:24:24,767 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:24,768 INFO L82 PathProgramCache]: Analyzing trace with hash 20572054, now seen corresponding path program 4 times [2020-10-09 19:24:24,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:24,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436656975] [2020-10-09 19:24:24,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:24,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 19:24:24,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 19:24:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-09 19:24:24,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-09 19:24:24,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436656975] [2020-10-09 19:24:24,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1972398299] [2020-10-09 19:24:24,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:24:25,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 19:24:25,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:25,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 19:24:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-09 19:24:25,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-09 19:24:25,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729471280] [2020-10-09 19:24:25,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:24:25,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 19:24:25,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:25,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 19:24:25,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-09 19:24:25,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-09 19:24:25,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:24:25,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 11 [2020-10-09 19:24:25,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263954167] [2020-10-09 19:24:25,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 19:24:25,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 19:24:25,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-09 19:24:25,279 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 56 [2020-10-09 19:24:25,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 523 flow. Second operand 11 states. [2020-10-09 19:24:25,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:25,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 56 [2020-10-09 19:24:25,280 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:25,553 INFO L129 PetriNetUnfolder]: 170/1143 cut-off events. [2020-10-09 19:24:25,554 INFO L130 PetriNetUnfolder]: For 2955/2956 co-relation queries the response was YES. [2020-10-09 19:24:25,563 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 1143 events. 170/1143 cut-off events. For 2955/2956 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 7836 event pairs, 36 based on Foata normal form. 25/1157 useless extension candidates. Maximal degree in co-relation 3852. Up to 136 conditions per place. [2020-10-09 19:24:25,569 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 9 selfloop transitions, 15 changer transitions 0/113 dead transitions. [2020-10-09 19:24:25,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 113 transitions, 630 flow [2020-10-09 19:24:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 19:24:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-09 19:24:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 731 transitions. [2020-10-09 19:24:25,573 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8702380952380953 [2020-10-09 19:24:25,573 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 731 transitions. [2020-10-09 19:24:25,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 731 transitions. [2020-10-09 19:24:25,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:25,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 731 transitions. [2020-10-09 19:24:25,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-09 19:24:25,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-09 19:24:25,578 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-09 19:24:25,578 INFO L185 Difference]: Start difference. First operand has 112 places, 104 transitions, 523 flow. Second operand 15 states and 731 transitions. [2020-10-09 19:24:25,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 113 transitions, 630 flow [2020-10-09 19:24:25,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 113 transitions, 628 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 19:24:25,590 INFO L241 Difference]: Finished difference. Result has 128 places, 111 transitions, 612 flow [2020-10-09 19:24:25,590 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=612, PETRI_PLACES=128, PETRI_TRANSITIONS=111} [2020-10-09 19:24:25,590 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 81 predicate places. [2020-10-09 19:24:25,590 INFO L481 AbstractCegarLoop]: Abstraction has has 128 places, 111 transitions, 612 flow [2020-10-09 19:24:25,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 19:24:25,591 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:25,591 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:24:26,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:24:26,211 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:26,212 INFO L82 PathProgramCache]: Analyzing trace with hash 739202078, now seen corresponding path program 5 times [2020-10-09 19:24:26,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:26,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995056968] [2020-10-09 19:24:26,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:26,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 19:24:26,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:26,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 19:24:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 34 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:26,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 34 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:26,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995056968] [2020-10-09 19:24:26,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1771636505] [2020-10-09 19:24:26,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:24:26,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 19:24:26,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:26,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 19:24:26,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 34 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:26,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 34 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:26,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239533593] [2020-10-09 19:24:26,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:24:26,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 19:24:26,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 19:24:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 34 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:26,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 44 proven. 34 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-09 19:24:26,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:24:26,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 19 [2020-10-09 19:24:26,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117215586] [2020-10-09 19:24:26,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 19:24:26,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:26,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 19:24:26,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-10-09 19:24:26,908 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-09 19:24:26,909 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 111 transitions, 612 flow. Second operand 20 states. [2020-10-09 19:24:26,910 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:26,910 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-09 19:24:26,910 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:27,919 INFO L129 PetriNetUnfolder]: 553/2930 cut-off events. [2020-10-09 19:24:27,919 INFO L130 PetriNetUnfolder]: For 14553/14653 co-relation queries the response was YES. [2020-10-09 19:24:27,945 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11799 conditions, 2930 events. 553/2930 cut-off events. For 14553/14653 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 25994 event pairs, 23 based on Foata normal form. 42/2970 useless extension candidates. Maximal degree in co-relation 11770. Up to 608 conditions per place. [2020-10-09 19:24:27,962 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 45 selfloop transitions, 52 changer transitions 29/188 dead transitions. [2020-10-09 19:24:27,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 188 transitions, 1379 flow [2020-10-09 19:24:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 19:24:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-09 19:24:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1275 transitions. [2020-10-09 19:24:27,967 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8131377551020408 [2020-10-09 19:24:27,967 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1275 transitions. [2020-10-09 19:24:27,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1275 transitions. [2020-10-09 19:24:27,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:27,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1275 transitions. [2020-10-09 19:24:27,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-09 19:24:27,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-09 19:24:27,975 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-09 19:24:27,975 INFO L185 Difference]: Start difference. First operand has 128 places, 111 transitions, 612 flow. Second operand 28 states and 1275 transitions. [2020-10-09 19:24:27,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 188 transitions, 1379 flow [2020-10-09 19:24:27,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 188 transitions, 1359 flow, removed 4 selfloop flow, removed 6 redundant places. [2020-10-09 19:24:28,002 INFO L241 Difference]: Finished difference. Result has 155 places, 140 transitions, 906 flow [2020-10-09 19:24:28,002 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=906, PETRI_PLACES=155, PETRI_TRANSITIONS=140} [2020-10-09 19:24:28,003 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 108 predicate places. [2020-10-09 19:24:28,003 INFO L481 AbstractCegarLoop]: Abstraction has has 155 places, 140 transitions, 906 flow [2020-10-09 19:24:28,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 19:24:28,003 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:24:28,003 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:24:28,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:24:28,615 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-09 19:24:28,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:24:28,616 INFO L82 PathProgramCache]: Analyzing trace with hash 942344964, now seen corresponding path program 6 times [2020-10-09 19:24:28,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:24:28,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045874064] [2020-10-09 19:24:28,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-10-09 19:24:28,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-09 19:24:28,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:28,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 19:24:28,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 109 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:28,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 109 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:29,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045874064] [2020-10-09 19:24:29,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945787377] [2020-10-09 19:24:29,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:24:29,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-09 19:24:29,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:29,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 19:24:29,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 109 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:29,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 109 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:29,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808482428] [2020-10-09 19:24:29,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:24:29,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-09 19:24:29,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 19:24:29,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 19:24:29,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:24:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 109 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:29,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:24:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 109 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:24:29,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:24:29,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 36 [2020-10-09 19:24:29,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752829466] [2020-10-09 19:24:29,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-09 19:24:29,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:24:29,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-09 19:24:29,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 19:24:29,888 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-09 19:24:29,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 140 transitions, 906 flow. Second operand 37 states. [2020-10-09 19:24:29,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:24:29,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-09 19:24:29,890 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:24:31,871 INFO L129 PetriNetUnfolder]: 1292/7195 cut-off events. [2020-10-09 19:24:31,871 INFO L130 PetriNetUnfolder]: For 53478/53839 co-relation queries the response was YES. [2020-10-09 19:24:31,916 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31729 conditions, 7195 events. 1292/7195 cut-off events. For 53478/53839 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 80834 event pairs, 6 based on Foata normal form. 142/7334 useless extension candidates. Maximal degree in co-relation 31693. Up to 1795 conditions per place. [2020-10-09 19:24:31,927 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 0 selfloop transitions, 0 changer transitions 469/469 dead transitions. [2020-10-09 19:24:31,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 469 transitions, 4217 flow [2020-10-09 19:24:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 19:24:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-09 19:24:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1643 transitions. [2020-10-09 19:24:31,931 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8149801587301587 [2020-10-09 19:24:31,932 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1643 transitions. [2020-10-09 19:24:31,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1643 transitions. [2020-10-09 19:24:31,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:24:31,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1643 transitions. [2020-10-09 19:24:31,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-09 19:24:31,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-09 19:24:31,938 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-09 19:24:31,938 INFO L185 Difference]: Start difference. First operand has 155 places, 140 transitions, 906 flow. Second operand 36 states and 1643 transitions. [2020-10-09 19:24:31,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 469 transitions, 4217 flow [2020-10-09 19:24:32,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 469 transitions, 3971 flow, removed 26 selfloop flow, removed 8 redundant places. [2020-10-09 19:24:32,025 INFO L241 Difference]: Finished difference. Result has 172 places, 0 transitions, 0 flow [2020-10-09 19:24:32,026 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=0, PETRI_PLACES=172, PETRI_TRANSITIONS=0} [2020-10-09 19:24:32,026 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 125 predicate places. [2020-10-09 19:24:32,026 INFO L481 AbstractCegarLoop]: Abstraction has has 172 places, 0 transitions, 0 flow [2020-10-09 19:24:32,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-09 19:24:32,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:24:32,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 07:24:32 BasicIcfg [2020-10-09 19:24:32,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 19:24:32,644 INFO L168 Benchmark]: Toolchain (without parser) took 16223.40 ms. Allocated memory was 253.8 MB in the beginning and 529.0 MB in the end (delta: 275.3 MB). Free memory was 208.8 MB in the beginning and 301.0 MB in the end (delta: -92.2 MB). Peak memory consumption was 183.0 MB. Max. memory is 14.2 GB. [2020-10-09 19:24:32,645 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 253.8 MB. Free memory was 231.8 MB in the beginning and 231.0 MB in the end (delta: 838.9 kB). Peak memory consumption was 838.9 kB. Max. memory is 14.2 GB. [2020-10-09 19:24:32,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.92 ms. Allocated memory was 253.8 MB in the beginning and 322.4 MB in the end (delta: 68.7 MB). Free memory was 208.8 MB in the beginning and 299.2 MB in the end (delta: -90.4 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. [2020-10-09 19:24:32,646 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.94 ms. Allocated memory is still 322.4 MB. Free memory was 299.2 MB in the beginning and 297.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-09 19:24:32,647 INFO L168 Benchmark]: Boogie Preprocessor took 21.16 ms. Allocated memory is still 322.4 MB. Free memory was 297.5 MB in the beginning and 295.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. [2020-10-09 19:24:32,648 INFO L168 Benchmark]: RCFGBuilder took 319.10 ms. Allocated memory is still 322.4 MB. Free memory was 295.9 MB in the beginning and 277.9 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 14.2 GB. [2020-10-09 19:24:32,648 INFO L168 Benchmark]: TraceAbstraction took 15516.74 ms. Allocated memory was 322.4 MB in the beginning and 529.0 MB in the end (delta: 206.6 MB). Free memory was 277.0 MB in the beginning and 301.0 MB in the end (delta: -24.0 MB). Peak memory consumption was 182.6 MB. Max. memory is 14.2 GB. [2020-10-09 19:24:32,652 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 253.8 MB. Free memory was 231.8 MB in the beginning and 231.0 MB in the end (delta: 838.9 kB). Peak memory consumption was 838.9 kB. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 326.92 ms. Allocated memory was 253.8 MB in the beginning and 322.4 MB in the end (delta: 68.7 MB). Free memory was 208.8 MB in the beginning and 299.2 MB in the end (delta: -90.4 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 32.94 ms. Allocated memory is still 322.4 MB. Free memory was 299.2 MB in the beginning and 297.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 21.16 ms. Allocated memory is still 322.4 MB. Free memory was 297.5 MB in the beginning and 295.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.2 GB. * RCFGBuilder took 319.10 ms. Allocated memory is still 322.4 MB. Free memory was 295.9 MB in the beginning and 277.9 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 14.2 GB. * TraceAbstraction took 15516.74 ms. Allocated memory was 322.4 MB in the beginning and 529.0 MB in the end (delta: 206.6 MB). Free memory was 277.0 MB in the beginning and 301.0 MB in the end (delta: -24.0 MB). Peak memory consumption was 182.6 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 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: 15.3s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 86 SDtfs, 260 SDslu, 420 SDs, 0 SdLazy, 1461 SolverSat, 215 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3037 GetRequests, 2767 SyntacticMatches, 49 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=906occurred in iteration=10, 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: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 1488 NumberOfCodeBlocks, 1398 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2930 ConstructedInterpolants, 0 QuantifiedInterpolants, 528906 SizeOfPredicates, 163 NumberOfNonLiveVariables, 2537 ConjunctsInSsa, 191 ConjunctsInUnsatCore, 46 InterpolantComputations, 10 PerfectInterpolantSequences, 2288/2882 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...