/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:20:56,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:20:56,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:20:56,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:20:56,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:20:56,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:20:56,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:20:56,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:20:56,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:20:56,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:20:56,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:20:56,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:20:56,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:20:57,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:20:57,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:20:57,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:20:57,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:20:57,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:20:57,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:20:57,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:20:57,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:20:57,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:20:57,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:20:57,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:20:57,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 20:20:57,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:20:57,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:20:57,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:20:57,028 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-11 20:20:57,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:20:57,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:20:57,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:20:57,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:20:57,057 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:20:57,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:20:57,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:20:57,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:20:57,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:20:57,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:20:57,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:20:57,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:20:57,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:20:57,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:20:57,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:20:57,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:20:57,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:20:57,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:20:57,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:20:57,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:20:57,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:20:57,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:20:57,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:20:57,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:20:57,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:20:57,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:20:57,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:20:57,061 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:20:57,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:20:57,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:20:57,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:20:57,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:20:57,334 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:20:57,334 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:20:57,334 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe005_tso.opt.i [2021-03-11 20:20:57,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fa1c3b1a/e78c7e2681174e25aca45bf1719ff4c6/FLAG0ef8def39 [2021-03-11 20:20:57,960 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:20:57,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.opt.i [2021-03-11 20:20:57,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fa1c3b1a/e78c7e2681174e25aca45bf1719ff4c6/FLAG0ef8def39 [2021-03-11 20:20:58,110 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fa1c3b1a/e78c7e2681174e25aca45bf1719ff4c6 [2021-03-11 20:20:58,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:20:58,116 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:20:58,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:20:58,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:20:58,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:20:58,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181725d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58, skipping insertion in model container [2021-03-11 20:20:58,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:20:58,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:20:58,288 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.opt.i[949,962] [2021-03-11 20:20:58,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:20:58,407 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:20:58,414 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe005_tso.opt.i[949,962] [2021-03-11 20:20:58,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:20:58,473 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:20:58,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58 WrapperNode [2021-03-11 20:20:58,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:20:58,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:20:58,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:20:58,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:20:58,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:20:58,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:20:58,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:20:58,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:20:58,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (1/1) ... [2021-03-11 20:20:58,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:20:58,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:20:58,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:20:58,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:20:58,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (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 [2021-03-11 20:20:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:20:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:20:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:20:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:20:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:20:58,561 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:20:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:20:58,561 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:20:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-11 20:20:58,562 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-11 20:20:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:20:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:20:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:20:58,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:20:58,563 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 20:20:58,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:20:58,873 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:20:58,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:20:58 BoogieIcfgContainer [2021-03-11 20:20:58,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:20:58,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:20:58,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:20:58,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:20:58,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:20:58" (1/3) ... [2021-03-11 20:20:58,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4c59ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:20:58, skipping insertion in model container [2021-03-11 20:20:58,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:20:58" (2/3) ... [2021-03-11 20:20:58,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4c59ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:20:58, skipping insertion in model container [2021-03-11 20:20:58,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:20:58" (3/3) ... [2021-03-11 20:20:58,879 INFO L111 eAbstractionObserver]: Analyzing ICFG safe005_tso.opt.i [2021-03-11 20:20:58,885 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:20:58,887 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:20:58,888 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:20:58,912 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,912 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,912 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,912 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,912 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,912 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,912 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,912 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,913 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,913 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,913 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,913 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,914 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,914 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,914 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,914 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,914 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,914 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,914 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,914 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,914 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,915 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,915 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,915 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,916 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,916 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,916 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,917 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,917 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,917 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,917 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,917 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,919 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,919 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,919 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,920 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,921 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,921 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,921 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,922 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,926 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,926 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,926 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,926 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,930 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,930 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,930 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,930 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:20:58,932 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:20:58,944 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 20:20:58,961 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:20:58,962 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:20:58,962 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:20:58,962 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:20:58,962 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:20:58,962 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:20:58,962 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:20:58,962 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:20:58,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 165 flow [2021-03-11 20:20:59,012 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2021-03-11 20:20:59,012 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:20:59,014 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2021-03-11 20:20:59,014 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 75 transitions, 165 flow [2021-03-11 20:20:59,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 60 transitions, 129 flow [2021-03-11 20:20:59,020 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:20:59,025 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 60 transitions, 129 flow [2021-03-11 20:20:59,028 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 60 transitions, 129 flow [2021-03-11 20:20:59,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 69 places, 60 transitions, 129 flow [2021-03-11 20:20:59,051 INFO L129 PetriNetUnfolder]: 1/60 cut-off events. [2021-03-11 20:20:59,051 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:20:59,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 60 events. 1/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-03-11 20:20:59,053 INFO L116 LiptonReduction]: Number of co-enabled transitions 864 [2021-03-11 20:21:00,579 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-03-11 20:21:00,745 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-03-11 20:21:00,809 INFO L131 LiptonReduction]: Checked pairs total: 1710 [2021-03-11 20:21:00,809 INFO L133 LiptonReduction]: Total number of compositions: 48 [2021-03-11 20:21:00,810 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1792 [2021-03-11 20:21:00,817 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-11 20:21:00,817 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:21:00,818 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:00,818 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:00,818 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:00,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1369737305, now seen corresponding path program 1 times [2021-03-11 20:21:00,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:00,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428476048] [2021-03-11 20:21:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:00,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:00,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:00,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:21:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:00,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428476048] [2021-03-11 20:21:00,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:00,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:21:00,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150562995] [2021-03-11 20:21:00,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-11 20:21:00,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-11 20:21:00,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-11 20:21:00,965 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 123 [2021-03-11 20:21:00,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:00,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:00,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 123 [2021-03-11 20:21:00,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:00,976 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 20:21:00,980 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:21:00,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-11 20:21:00,981 INFO L132 encePairwiseOnDemand]: 122/123 looper letters, 0 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2021-03-11 20:21:00,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 43 flow [2021-03-11 20:21:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-11 20:21:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-11 20:21:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 231 transitions. [2021-03-11 20:21:00,988 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9390243902439024 [2021-03-11 20:21:00,988 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 231 transitions. [2021-03-11 20:21:00,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 231 transitions. [2021-03-11 20:21:00,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:00,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 231 transitions. [2021-03-11 20:21:00,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:00,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:00,995 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:00,995 INFO L185 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 2 states and 231 transitions. [2021-03-11 20:21:00,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 43 flow [2021-03-11 20:21:00,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 40 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-11 20:21:00,998 INFO L241 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2021-03-11 20:21:00,999 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2021-03-11 20:21:00,999 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2021-03-11 20:21:00,999 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2021-03-11 20:21:00,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,000 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:01,000 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:01,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:21:01,000 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:01,000 INFO L82 PathProgramCache]: Analyzing trace with hash -487816528, now seen corresponding path program 1 times [2021-03-11 20:21:01,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:01,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255660443] [2021-03-11 20:21:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:01,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,074 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:01,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255660443] [2021-03-11 20:21:01,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:01,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:21:01,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915585185] [2021-03-11 20:21:01,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:21:01,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:21:01,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:21:01,081 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 123 [2021-03-11 20:21:01,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:01,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 123 [2021-03-11 20:21:01,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:01,106 INFO L129 PetriNetUnfolder]: 21/62 cut-off events. [2021-03-11 20:21:01,106 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:21:01,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 62 events. 21/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 194 event pairs, 11 based on Foata normal form. 3/62 useless extension candidates. Maximal degree in co-relation 110. Up to 40 conditions per place. [2021-03-11 20:21:01,108 INFO L132 encePairwiseOnDemand]: 119/123 looper letters, 7 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2021-03-11 20:21:01,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 68 flow [2021-03-11 20:21:01,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:21:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:21:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2021-03-11 20:21:01,112 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8428184281842819 [2021-03-11 20:21:01,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2021-03-11 20:21:01,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2021-03-11 20:21:01,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:01,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2021-03-11 20:21:01,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,119 INFO L185 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 311 transitions. [2021-03-11 20:21:01,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 68 flow [2021-03-11 20:21:01,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 21 transitions, 68 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:21:01,120 INFO L241 Difference]: Finished difference. Result has 28 places, 19 transitions, 59 flow [2021-03-11 20:21:01,120 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=28, PETRI_TRANSITIONS=19} [2021-03-11 20:21:01,120 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2021-03-11 20:21:01,120 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 19 transitions, 59 flow [2021-03-11 20:21:01,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,120 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:01,121 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:01,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:21:01,121 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1653995798, now seen corresponding path program 1 times [2021-03-11 20:21:01,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:01,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811410652] [2021-03-11 20:21:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:01,190 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,190 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,196 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:21:01,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:21:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:01,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811410652] [2021-03-11 20:21:01,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:01,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:21:01,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261197581] [2021-03-11 20:21:01,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:21:01,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:21:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:21:01,206 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 123 [2021-03-11 20:21:01,207 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 19 transitions, 59 flow. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,207 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:01,207 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 123 [2021-03-11 20:21:01,207 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:01,233 INFO L129 PetriNetUnfolder]: 33/100 cut-off events. [2021-03-11 20:21:01,233 INFO L130 PetriNetUnfolder]: For 37/51 co-relation queries the response was YES. [2021-03-11 20:21:01,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 100 events. 33/100 cut-off events. For 37/51 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 379 event pairs, 1 based on Foata normal form. 12/108 useless extension candidates. Maximal degree in co-relation 219. Up to 38 conditions per place. [2021-03-11 20:21:01,234 INFO L132 encePairwiseOnDemand]: 116/123 looper letters, 9 selfloop transitions, 7 changer transitions 1/27 dead transitions. [2021-03-11 20:21:01,234 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 121 flow [2021-03-11 20:21:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:21:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:21:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2021-03-11 20:21:01,235 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7703252032520326 [2021-03-11 20:21:01,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2021-03-11 20:21:01,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2021-03-11 20:21:01,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:01,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2021-03-11 20:21:01,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,237 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,237 INFO L185 Difference]: Start difference. First operand has 28 places, 19 transitions, 59 flow. Second operand 4 states and 379 transitions. [2021-03-11 20:21:01,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 121 flow [2021-03-11 20:21:01,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:21:01,238 INFO L241 Difference]: Finished difference. Result has 33 places, 24 transitions, 114 flow [2021-03-11 20:21:01,238 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=24} [2021-03-11 20:21:01,238 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2021-03-11 20:21:01,238 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 114 flow [2021-03-11 20:21:01,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,239 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:01,239 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:01,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:21:01,239 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash -640266891, now seen corresponding path program 1 times [2021-03-11 20:21:01,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:01,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977342478] [2021-03-11 20:21:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:01,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,261 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,263 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:01,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977342478] [2021-03-11 20:21:01,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:01,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:21:01,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277395334] [2021-03-11 20:21:01,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:21:01,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:01,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:21:01,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:21:01,266 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 123 [2021-03-11 20:21:01,266 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,266 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:01,266 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 123 [2021-03-11 20:21:01,267 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:01,287 INFO L129 PetriNetUnfolder]: 28/113 cut-off events. [2021-03-11 20:21:01,287 INFO L130 PetriNetUnfolder]: For 160/188 co-relation queries the response was YES. [2021-03-11 20:21:01,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 113 events. 28/113 cut-off events. For 160/188 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 544 event pairs, 0 based on Foata normal form. 12/122 useless extension candidates. Maximal degree in co-relation 332. Up to 37 conditions per place. [2021-03-11 20:21:01,288 INFO L132 encePairwiseOnDemand]: 118/123 looper letters, 8 selfloop transitions, 4 changer transitions 7/31 dead transitions. [2021-03-11 20:21:01,288 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 194 flow [2021-03-11 20:21:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:21:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:21:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 398 transitions. [2021-03-11 20:21:01,289 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8089430894308943 [2021-03-11 20:21:01,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 398 transitions. [2021-03-11 20:21:01,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 398 transitions. [2021-03-11 20:21:01,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:01,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 398 transitions. [2021-03-11 20:21:01,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,291 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,292 INFO L185 Difference]: Start difference. First operand has 33 places, 24 transitions, 114 flow. Second operand 4 states and 398 transitions. [2021-03-11 20:21:01,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 194 flow [2021-03-11 20:21:01,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 191 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:21:01,293 INFO L241 Difference]: Finished difference. Result has 36 places, 23 transitions, 117 flow [2021-03-11 20:21:01,293 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=23} [2021-03-11 20:21:01,293 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2021-03-11 20:21:01,293 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 23 transitions, 117 flow [2021-03-11 20:21:01,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,294 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:01,294 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:01,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:21:01,294 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:01,294 INFO L82 PathProgramCache]: Analyzing trace with hash 351409165, now seen corresponding path program 1 times [2021-03-11 20:21:01,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:01,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657969925] [2021-03-11 20:21:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:01,314 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,314 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:21:01,315 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,315 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:01,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657969925] [2021-03-11 20:21:01,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:01,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:21:01,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210862437] [2021-03-11 20:21:01,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:21:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:01,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:21:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:21:01,320 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 123 [2021-03-11 20:21:01,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 23 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:01,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 123 [2021-03-11 20:21:01,321 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:01,341 INFO L129 PetriNetUnfolder]: 14/95 cut-off events. [2021-03-11 20:21:01,341 INFO L130 PetriNetUnfolder]: For 180/189 co-relation queries the response was YES. [2021-03-11 20:21:01,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 95 events. 14/95 cut-off events. For 180/189 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 465 event pairs, 0 based on Foata normal form. 8/101 useless extension candidates. Maximal degree in co-relation 279. Up to 27 conditions per place. [2021-03-11 20:21:01,341 INFO L132 encePairwiseOnDemand]: 119/123 looper letters, 6 selfloop transitions, 4 changer transitions 9/31 dead transitions. [2021-03-11 20:21:01,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 31 transitions, 205 flow [2021-03-11 20:21:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:21:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:21:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 495 transitions. [2021-03-11 20:21:01,343 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2021-03-11 20:21:01,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 495 transitions. [2021-03-11 20:21:01,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 495 transitions. [2021-03-11 20:21:01,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:01,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 495 transitions. [2021-03-11 20:21:01,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.0) internal successors, (495), 5 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,345 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,345 INFO L185 Difference]: Start difference. First operand has 36 places, 23 transitions, 117 flow. Second operand 5 states and 495 transitions. [2021-03-11 20:21:01,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 31 transitions, 205 flow [2021-03-11 20:21:01,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 189 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-03-11 20:21:01,346 INFO L241 Difference]: Finished difference. Result has 41 places, 22 transitions, 123 flow [2021-03-11 20:21:01,346 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=41, PETRI_TRANSITIONS=22} [2021-03-11 20:21:01,347 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2021-03-11 20:21:01,347 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 22 transitions, 123 flow [2021-03-11 20:21:01,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,347 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:01,347 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:01,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:21:01,347 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:01,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:01,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1128307182, now seen corresponding path program 1 times [2021-03-11 20:21:01,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:01,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457993522] [2021-03-11 20:21:01,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:01,366 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,368 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:21:01,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:21:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:01,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457993522] [2021-03-11 20:21:01,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:01,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:21:01,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105753263] [2021-03-11 20:21:01,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:21:01,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:21:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:21:01,376 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 123 [2021-03-11 20:21:01,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 22 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:01,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 123 [2021-03-11 20:21:01,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:01,387 INFO L129 PetriNetUnfolder]: 5/47 cut-off events. [2021-03-11 20:21:01,387 INFO L130 PetriNetUnfolder]: For 123/134 co-relation queries the response was YES. [2021-03-11 20:21:01,387 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 47 events. 5/47 cut-off events. For 123/134 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 157 event pairs, 1 based on Foata normal form. 3/49 useless extension candidates. Maximal degree in co-relation 152. Up to 14 conditions per place. [2021-03-11 20:21:01,387 INFO L132 encePairwiseOnDemand]: 118/123 looper letters, 8 selfloop transitions, 5 changer transitions 2/25 dead transitions. [2021-03-11 20:21:01,387 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 25 transitions, 175 flow [2021-03-11 20:21:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:21:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:21:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2021-03-11 20:21:01,390 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7621951219512195 [2021-03-11 20:21:01,390 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2021-03-11 20:21:01,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2021-03-11 20:21:01,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:01,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2021-03-11 20:21:01,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,392 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,392 INFO L185 Difference]: Start difference. First operand has 41 places, 22 transitions, 123 flow. Second operand 4 states and 375 transitions. [2021-03-11 20:21:01,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 25 transitions, 175 flow [2021-03-11 20:21:01,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 25 transitions, 151 flow, removed 7 selfloop flow, removed 4 redundant places. [2021-03-11 20:21:01,393 INFO L241 Difference]: Finished difference. Result has 40 places, 23 transitions, 134 flow [2021-03-11 20:21:01,393 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=40, PETRI_TRANSITIONS=23} [2021-03-11 20:21:01,393 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2021-03-11 20:21:01,393 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 23 transitions, 134 flow [2021-03-11 20:21:01,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,394 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:01,394 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:01,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 20:21:01,394 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:01,394 INFO L82 PathProgramCache]: Analyzing trace with hash -638934884, now seen corresponding path program 1 times [2021-03-11 20:21:01,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:01,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894511523] [2021-03-11 20:21:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:01,432 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,432 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:21:01,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,435 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,437 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,438 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:01,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894511523] [2021-03-11 20:21:01,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:01,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:21:01,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232634170] [2021-03-11 20:21:01,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:21:01,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:01,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:21:01,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:21:01,442 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 123 [2021-03-11 20:21:01,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 23 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:01,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 123 [2021-03-11 20:21:01,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:01,460 INFO L129 PetriNetUnfolder]: 1/48 cut-off events. [2021-03-11 20:21:01,461 INFO L130 PetriNetUnfolder]: For 66/68 co-relation queries the response was YES. [2021-03-11 20:21:01,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 48 events. 1/48 cut-off events. For 66/68 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 174 event pairs, 0 based on Foata normal form. 2/50 useless extension candidates. Maximal degree in co-relation 133. Up to 11 conditions per place. [2021-03-11 20:21:01,461 INFO L132 encePairwiseOnDemand]: 120/123 looper letters, 2 selfloop transitions, 2 changer transitions 6/23 dead transitions. [2021-03-11 20:21:01,462 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 23 transitions, 138 flow [2021-03-11 20:21:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:21:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:21:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 402 transitions. [2021-03-11 20:21:01,463 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8170731707317073 [2021-03-11 20:21:01,463 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 402 transitions. [2021-03-11 20:21:01,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 402 transitions. [2021-03-11 20:21:01,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:01,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 402 transitions. [2021-03-11 20:21:01,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,465 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,465 INFO L185 Difference]: Start difference. First operand has 40 places, 23 transitions, 134 flow. Second operand 4 states and 402 transitions. [2021-03-11 20:21:01,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 23 transitions, 138 flow [2021-03-11 20:21:01,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 23 transitions, 125 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-03-11 20:21:01,468 INFO L241 Difference]: Finished difference. Result has 40 places, 17 transitions, 79 flow [2021-03-11 20:21:01,468 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=79, PETRI_PLACES=40, PETRI_TRANSITIONS=17} [2021-03-11 20:21:01,468 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 13 predicate places. [2021-03-11 20:21:01,468 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 17 transitions, 79 flow [2021-03-11 20:21:01,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,468 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:01,468 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:01,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 20:21:01,468 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1127551650, now seen corresponding path program 1 times [2021-03-11 20:21:01,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:01,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420367169] [2021-03-11 20:21:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:01,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,525 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,529 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:21:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:01,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420367169] [2021-03-11 20:21:01,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:01,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:21:01,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977416906] [2021-03-11 20:21:01,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:21:01,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:01,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:21:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:21:01,531 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 123 [2021-03-11 20:21:01,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 17 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:01,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 123 [2021-03-11 20:21:01,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:01,545 INFO L129 PetriNetUnfolder]: 16/51 cut-off events. [2021-03-11 20:21:01,546 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2021-03-11 20:21:01,546 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 51 events. 16/51 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 128 event pairs, 7 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 124. Up to 34 conditions per place. [2021-03-11 20:21:01,546 INFO L132 encePairwiseOnDemand]: 118/123 looper letters, 4 selfloop transitions, 3 changer transitions 1/20 dead transitions. [2021-03-11 20:21:01,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 20 transitions, 101 flow [2021-03-11 20:21:01,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:21:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:21:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2021-03-11 20:21:01,548 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8130081300813008 [2021-03-11 20:21:01,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2021-03-11 20:21:01,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2021-03-11 20:21:01,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:01,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2021-03-11 20:21:01,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,549 INFO L185 Difference]: Start difference. First operand has 40 places, 17 transitions, 79 flow. Second operand 3 states and 300 transitions. [2021-03-11 20:21:01,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 20 transitions, 101 flow [2021-03-11 20:21:01,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 77 flow, removed 3 selfloop flow, removed 10 redundant places. [2021-03-11 20:21:01,550 INFO L241 Difference]: Finished difference. Result has 33 places, 19 transitions, 76 flow [2021-03-11 20:21:01,550 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=19} [2021-03-11 20:21:01,550 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2021-03-11 20:21:01,550 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 19 transitions, 76 flow [2021-03-11 20:21:01,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,551 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:01,551 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:01,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 20:21:01,551 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:01,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2095023676, now seen corresponding path program 1 times [2021-03-11 20:21:01,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:01,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012696420] [2021-03-11 20:21:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:01,584 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:21:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:01,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012696420] [2021-03-11 20:21:01,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:01,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:21:01,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069827524] [2021-03-11 20:21:01,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:21:01,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:01,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:21:01,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:21:01,592 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 123 [2021-03-11 20:21:01,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 19 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:01,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 123 [2021-03-11 20:21:01,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:01,607 INFO L129 PetriNetUnfolder]: 6/31 cut-off events. [2021-03-11 20:21:01,607 INFO L130 PetriNetUnfolder]: For 12/24 co-relation queries the response was YES. [2021-03-11 20:21:01,607 INFO L84 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 31 events. 6/31 cut-off events. For 12/24 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 40 event pairs, 1 based on Foata normal form. 5/35 useless extension candidates. Maximal degree in co-relation 85. Up to 18 conditions per place. [2021-03-11 20:21:01,608 INFO L132 encePairwiseOnDemand]: 118/123 looper letters, 2 selfloop transitions, 5 changer transitions 3/22 dead transitions. [2021-03-11 20:21:01,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 22 transitions, 108 flow [2021-03-11 20:21:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:21:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:21:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 399 transitions. [2021-03-11 20:21:01,609 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8109756097560976 [2021-03-11 20:21:01,609 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 399 transitions. [2021-03-11 20:21:01,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 399 transitions. [2021-03-11 20:21:01,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:01,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 399 transitions. [2021-03-11 20:21:01,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,611 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,611 INFO L185 Difference]: Start difference. First operand has 33 places, 19 transitions, 76 flow. Second operand 4 states and 399 transitions. [2021-03-11 20:21:01,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 22 transitions, 108 flow [2021-03-11 20:21:01,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 22 transitions, 105 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:21:01,612 INFO L241 Difference]: Finished difference. Result has 36 places, 19 transitions, 91 flow [2021-03-11 20:21:01,612 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=19} [2021-03-11 20:21:01,612 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2021-03-11 20:21:01,612 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 19 transitions, 91 flow [2021-03-11 20:21:01,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 97.75) internal successors, (391), 4 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,612 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:01,612 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:01,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 20:21:01,613 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:01,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:01,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1669336977, now seen corresponding path program 1 times [2021-03-11 20:21:01,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:01,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973868237] [2021-03-11 20:21:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:01,655 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:01,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:01,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:21:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:21:01,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973868237] [2021-03-11 20:21:01,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:01,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:21:01,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730680640] [2021-03-11 20:21:01,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:21:01,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:01,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:21:01,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:21:01,666 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 123 [2021-03-11 20:21:01,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 19 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:01,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 123 [2021-03-11 20:21:01,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:01,680 INFO L129 PetriNetUnfolder]: 1/18 cut-off events. [2021-03-11 20:21:01,680 INFO L130 PetriNetUnfolder]: For 21/37 co-relation queries the response was YES. [2021-03-11 20:21:01,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 18 events. 1/18 cut-off events. For 21/37 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 5/23 useless extension candidates. Maximal degree in co-relation 52. Up to 7 conditions per place. [2021-03-11 20:21:01,680 INFO L132 encePairwiseOnDemand]: 118/123 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2021-03-11 20:21:01,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 18 transitions, 97 flow [2021-03-11 20:21:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:21:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:21:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 493 transitions. [2021-03-11 20:21:01,681 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8016260162601626 [2021-03-11 20:21:01,681 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 493 transitions. [2021-03-11 20:21:01,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 493 transitions. [2021-03-11 20:21:01,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:01,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 493 transitions. [2021-03-11 20:21:01,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,683 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 123.0) internal successors, (738), 6 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,684 INFO L185 Difference]: Start difference. First operand has 36 places, 19 transitions, 91 flow. Second operand 5 states and 493 transitions. [2021-03-11 20:21:01,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 18 transitions, 97 flow [2021-03-11 20:21:01,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 18 transitions, 82 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-03-11 20:21:01,684 INFO L241 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2021-03-11 20:21:01,685 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2021-03-11 20:21:01,685 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 8 predicate places. [2021-03-11 20:21:01,685 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2021-03-11 20:21:01,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:21:01,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 20:21:01,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:21:01 BasicIcfg [2021-03-11 20:21:01,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:21:01,688 INFO L168 Benchmark]: Toolchain (without parser) took 3574.24 ms. Allocated memory was 255.9 MB in the beginning and 427.8 MB in the end (delta: 172.0 MB). Free memory was 237.2 MB in the beginning and 372.9 MB in the end (delta: -135.7 MB). Peak memory consumption was 34.6 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:01,688 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:21:01,689 INFO L168 Benchmark]: CACSL2BoogieTranslator took 355.70 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 236.8 MB in the beginning and 320.5 MB in the end (delta: -83.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:01,689 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.21 ms. Allocated memory is still 356.5 MB. Free memory was 320.5 MB in the beginning and 318.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:01,689 INFO L168 Benchmark]: Boogie Preprocessor took 13.26 ms. Allocated memory is still 356.5 MB. Free memory was 318.4 MB in the beginning and 317.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:01,689 INFO L168 Benchmark]: RCFGBuilder took 360.23 ms. Allocated memory is still 356.5 MB. Free memory was 317.3 MB in the beginning and 295.3 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:01,690 INFO L168 Benchmark]: TraceAbstraction took 2812.43 ms. Allocated memory was 356.5 MB in the beginning and 427.8 MB in the end (delta: 71.3 MB). Free memory was 294.7 MB in the beginning and 372.9 MB in the end (delta: -78.2 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:21:01,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 355.70 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 236.8 MB in the beginning and 320.5 MB in the end (delta: -83.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.21 ms. Allocated memory is still 356.5 MB. Free memory was 320.5 MB in the beginning and 318.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.26 ms. Allocated memory is still 356.5 MB. Free memory was 318.4 MB in the beginning and 317.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 360.23 ms. Allocated memory is still 356.5 MB. Free memory was 317.3 MB in the beginning and 295.3 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2812.43 ms. Allocated memory was 356.5 MB in the beginning and 427.8 MB in the end (delta: 71.3 MB). Free memory was 294.7 MB in the beginning and 372.9 MB in the end (delta: -78.2 MB). There was no memory consumed. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1780.9ms, 69 PlacesBefore, 27 PlacesAfterwards, 60 TransitionsBefore, 18 TransitionsAfterwards, 864 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 48 TotalNumberOfCompositions, 1710 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 979, positive: 903, positive conditional: 0, positive unconditional: 903, negative: 76, negative conditional: 0, negative unconditional: 76, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 639, positive: 606, positive conditional: 0, positive unconditional: 606, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 639, positive: 595, positive conditional: 0, positive unconditional: 595, negative: 44, negative conditional: 0, negative unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 44, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 33, negative conditional: 0, negative unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 149, positive: 45, positive conditional: 0, positive unconditional: 45, negative: 103, negative conditional: 0, negative unconditional: 103, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 979, positive: 297, positive conditional: 0, positive unconditional: 297, negative: 43, negative conditional: 0, negative unconditional: 43, unknown: 639, unknown conditional: 0, unknown unconditional: 639] , Statistics on independence cache: Total cache size (in pairs): 64, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2727.2ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 271.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1853.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41 SDtfs, 23 SDslu, 13 SDs, 0 SdLazy, 85 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=6, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.7ms SsaConstructionTime, 118.4ms SatisfiabilityAnalysisTime, 350.4ms InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...