/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/safe020_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 19:54:34,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 19:54:34,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 19:54:34,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-24 19:54:34,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 19:54:34,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 19:54:34,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 19:54:34,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 19:54:34,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 19:54:34,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 19:54:34,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 19:54:34,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 19:54:34,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 19:54:34,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 19:54:34,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 19:54:34,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 19:54:34,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 19:54:34,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 19:54:34,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 19:54:34,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 19:54:34,589 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 [2021-03-24 19:54:34,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 19:54:34,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 19:54:34,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 19:54:34,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 19:54:34,609 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 19:54:34,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 19:54:34,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 19:54:34,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 19:54:34,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 19:54:34,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 19:54:34,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 19:54:34,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 19:54:34,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 19:54:34,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 19:54:34,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 19:54:34,611 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 19:54:34,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 19:54:34,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 19:54:34,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 19:54:34,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 19:54:34,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 19:54:34,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 19:54:34,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 19:54:34,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 19:54:34,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 19:54:34,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 19:54:34,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 19:54:34,612 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 19:54:34,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 19:54:34,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 19:54:34,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 19:54:34,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 19:54:34,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-24 19:54:34,937 INFO L275 PluginConnector]: CDTParser initialized [2021-03-24 19:54:34,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe020_pso.opt.i [2021-03-24 19:54:34,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4e33b32/5f6a12d071b04b409fb5c9551e2ed43b/FLAG842efefa4 [2021-03-24 19:54:35,544 INFO L306 CDTParser]: Found 1 translation units. [2021-03-24 19:54:35,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe020_pso.opt.i [2021-03-24 19:54:35,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4e33b32/5f6a12d071b04b409fb5c9551e2ed43b/FLAG842efefa4 [2021-03-24 19:54:35,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f4e33b32/5f6a12d071b04b409fb5c9551e2ed43b [2021-03-24 19:54:35,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 19:54:36,000 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-24 19:54:36,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-24 19:54:36,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-24 19:54:36,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-24 19:54:36,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 07:54:35" (1/1) ... [2021-03-24 19:54:36,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1908953f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36, skipping insertion in model container [2021-03-24 19:54:36,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.03 07:54:35" (1/1) ... [2021-03-24 19:54:36,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-24 19:54:36,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-24 19:54:36,169 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/safe020_pso.opt.i[949,962] [2021-03-24 19:54:36,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 19:54:36,327 INFO L203 MainTranslator]: Completed pre-run [2021-03-24 19:54:36,337 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/safe020_pso.opt.i[949,962] [2021-03-24 19:54:36,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-24 19:54:36,418 INFO L208 MainTranslator]: Completed translation [2021-03-24 19:54:36,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36 WrapperNode [2021-03-24 19:54:36,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-24 19:54:36,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 19:54:36,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 19:54:36,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 19:54:36,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (1/1) ... [2021-03-24 19:54:36,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (1/1) ... [2021-03-24 19:54:36,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 19:54:36,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 19:54:36,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 19:54:36,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 19:54:36,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (1/1) ... [2021-03-24 19:54:36,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (1/1) ... [2021-03-24 19:54:36,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (1/1) ... [2021-03-24 19:54:36,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (1/1) ... [2021-03-24 19:54:36,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (1/1) ... [2021-03-24 19:54:36,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (1/1) ... [2021-03-24 19:54:36,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (1/1) ... [2021-03-24 19:54:36,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 19:54:36,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 19:54:36,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 19:54:36,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 19:54:36,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (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 [2021-03-24 19:54:36,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-24 19:54:36,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-24 19:54:36,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-24 19:54:36,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-24 19:54:36,534 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-24 19:54:36,534 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-24 19:54:36,534 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-24 19:54:36,534 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-24 19:54:36,535 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-24 19:54:36,535 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-24 19:54:36,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-24 19:54:36,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-24 19:54:36,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 19:54:36,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 19:54:36,537 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 19:54:36,956 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 19:54:36,956 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-24 19:54:36,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 07:54:36 BoogieIcfgContainer [2021-03-24 19:54:36,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 19:54:36,960 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 19:54:36,960 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 19:54:36,962 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 19:54:36,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.03 07:54:35" (1/3) ... [2021-03-24 19:54:36,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455b8dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 07:54:36, skipping insertion in model container [2021-03-24 19:54:36,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.03 07:54:36" (2/3) ... [2021-03-24 19:54:36,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@455b8dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 07:54:36, skipping insertion in model container [2021-03-24 19:54:36,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 07:54:36" (3/3) ... [2021-03-24 19:54:36,965 INFO L111 eAbstractionObserver]: Analyzing ICFG safe020_pso.opt.i [2021-03-24 19:54:36,970 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 19:54:36,974 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 19:54:36,974 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 19:54:37,015 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,016 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,016 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,016 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,016 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,016 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,017 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,017 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,017 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,017 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,017 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,018 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,018 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,019 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,019 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,019 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,019 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,019 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,019 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,019 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,020 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,020 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,020 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,020 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,021 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,021 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,021 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,021 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,022 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,023 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,023 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,023 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,024 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,024 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,024 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,025 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,027 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,028 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,028 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,028 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,032 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,032 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,032 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,032 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,036 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,037 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,037 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,037 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 19:54:37,038 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-24 19:54:37,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-24 19:54:37,075 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 19:54:37,075 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 19:54:37,075 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 19:54:37,075 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 19:54:37,075 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 19:54:37,075 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 19:54:37,076 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 19:54:37,076 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 19:54:37,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 81 places, 73 transitions, 161 flow [2021-03-24 19:54:37,114 INFO L129 PetriNetUnfolder]: 2/70 cut-off events. [2021-03-24 19:54:37,114 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 19:54:37,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 70 events. 2/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2021-03-24 19:54:37,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 73 transitions, 161 flow [2021-03-24 19:54:37,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 58 transitions, 125 flow [2021-03-24 19:54:37,122 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 19:54:37,133 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 58 transitions, 125 flow [2021-03-24 19:54:37,136 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 58 transitions, 125 flow [2021-03-24 19:54:37,137 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 67 places, 58 transitions, 125 flow [2021-03-24 19:54:37,151 INFO L129 PetriNetUnfolder]: 1/58 cut-off events. [2021-03-24 19:54:37,151 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 19:54:37,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 58 events. 1/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2021-03-24 19:54:37,154 INFO L142 LiptonReduction]: Number of co-enabled transitions 804 [2021-03-24 19:54:38,745 INFO L154 LiptonReduction]: Checked pairs total: 958 [2021-03-24 19:54:38,745 INFO L156 LiptonReduction]: Total number of compositions: 38 [2021-03-24 19:54:38,747 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1626 [2021-03-24 19:54:38,756 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-24 19:54:38,756 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 19:54:38,756 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:38,756 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:38,757 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:38,761 INFO L82 PathProgramCache]: Analyzing trace with hash 456015442, now seen corresponding path program 1 times [2021-03-24 19:54:38,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:38,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259729299] [2021-03-24 19:54:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:39,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,035 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,046 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-24 19:54:39,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 19:54:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:39,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259729299] [2021-03-24 19:54:39,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:39,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-24 19:54:39,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98945937] [2021-03-24 19:54:39,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:39,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:39,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:39,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:39,085 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 111 [2021-03-24 19:54:39,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 49 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) [2021-03-24 19:54:39,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:39,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 111 [2021-03-24 19:54:39,094 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:39,131 INFO L129 PetriNetUnfolder]: 8/48 cut-off events. [2021-03-24 19:54:39,136 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 19:54:39,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 48 events. 8/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 121 event pairs, 2 based on Foata normal form. 4/49 useless extension candidates. Maximal degree in co-relation 73. Up to 19 conditions per place. [2021-03-24 19:54:39,138 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 6 selfloop transitions, 5 changer transitions 0/24 dead transitions. [2021-03-24 19:54:39,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 79 flow [2021-03-24 19:54:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 19:54:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 19:54:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2021-03-24 19:54:39,148 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8490990990990991 [2021-03-24 19:54:39,149 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2021-03-24 19:54:39,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2021-03-24 19:54:39,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:39,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2021-03-24 19:54:39,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 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) [2021-03-24 19:54:39,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 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) [2021-03-24 19:54:39,161 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 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) [2021-03-24 19:54:39,163 INFO L185 Difference]: Start difference. First operand has 30 places, 20 transitions, 49 flow. Second operand 4 states and 377 transitions. [2021-03-24 19:54:39,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 79 flow [2021-03-24 19:54:39,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 76 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-24 19:54:39,177 INFO L241 Difference]: Finished difference. Result has 32 places, 22 transitions, 73 flow [2021-03-24 19:54:39,178 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2021-03-24 19:54:39,179 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2021-03-24 19:54:39,179 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 73 flow [2021-03-24 19:54:39,179 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) [2021-03-24 19:54:39,179 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:39,180 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:39,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 19:54:39,180 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:39,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:39,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1251576527, now seen corresponding path program 1 times [2021-03-24 19:54:39,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:39,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927603632] [2021-03-24 19:54:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:39,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:39,228 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,228 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,231 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-24 19:54:39,233 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 19:54:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:39,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927603632] [2021-03-24 19:54:39,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:39,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 19:54:39,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546700291] [2021-03-24 19:54:39,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:39,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:39,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:39,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:39,242 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 111 [2021-03-24 19:54:39,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 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) [2021-03-24 19:54:39,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:39,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 111 [2021-03-24 19:54:39,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:39,284 INFO L129 PetriNetUnfolder]: 35/109 cut-off events. [2021-03-24 19:54:39,285 INFO L130 PetriNetUnfolder]: For 79/144 co-relation queries the response was YES. [2021-03-24 19:54:39,285 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 109 events. 35/109 cut-off events. For 79/144 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 425 event pairs, 2 based on Foata normal form. 5/113 useless extension candidates. Maximal degree in co-relation 261. Up to 35 conditions per place. [2021-03-24 19:54:39,286 INFO L132 encePairwiseOnDemand]: 103/111 looper letters, 10 selfloop transitions, 16 changer transitions 0/37 dead transitions. [2021-03-24 19:54:39,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 37 transitions, 193 flow [2021-03-24 19:54:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 19:54:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 19:54:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 454 transitions. [2021-03-24 19:54:39,289 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.818018018018018 [2021-03-24 19:54:39,290 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 454 transitions. [2021-03-24 19:54:39,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 454 transitions. [2021-03-24 19:54:39,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:39,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 454 transitions. [2021-03-24 19:54:39,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 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) [2021-03-24 19:54:39,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 19:54:39,294 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 19:54:39,294 INFO L185 Difference]: Start difference. First operand has 32 places, 22 transitions, 73 flow. Second operand 5 states and 454 transitions. [2021-03-24 19:54:39,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 37 transitions, 193 flow [2021-03-24 19:54:39,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 19:54:39,296 INFO L241 Difference]: Finished difference. Result has 38 places, 33 transitions, 188 flow [2021-03-24 19:54:39,296 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2021-03-24 19:54:39,297 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2021-03-24 19:54:39,297 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 188 flow [2021-03-24 19:54:39,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 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) [2021-03-24 19:54:39,297 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:39,297 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:39,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 19:54:39,298 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash 127173147, now seen corresponding path program 1 times [2021-03-24 19:54:39,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:39,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003342761] [2021-03-24 19:54:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:39,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:39,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,349 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-24 19:54:39,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 19:54:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:39,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003342761] [2021-03-24 19:54:39,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:39,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 19:54:39,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774086362] [2021-03-24 19:54:39,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 19:54:39,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:39,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 19:54:39,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-24 19:54:39,363 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 111 [2021-03-24 19:54:39,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 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) [2021-03-24 19:54:39,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:39,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 111 [2021-03-24 19:54:39,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:39,420 INFO L129 PetriNetUnfolder]: 25/104 cut-off events. [2021-03-24 19:54:39,420 INFO L130 PetriNetUnfolder]: For 221/345 co-relation queries the response was YES. [2021-03-24 19:54:39,422 INFO L84 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 104 events. 25/104 cut-off events. For 221/345 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 441 event pairs, 2 based on Foata normal form. 11/114 useless extension candidates. Maximal degree in co-relation 357. Up to 32 conditions per place. [2021-03-24 19:54:39,422 INFO L132 encePairwiseOnDemand]: 103/111 looper letters, 8 selfloop transitions, 9 changer transitions 12/40 dead transitions. [2021-03-24 19:54:39,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 301 flow [2021-03-24 19:54:39,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 19:54:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 19:54:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 450 transitions. [2021-03-24 19:54:39,425 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8108108108108109 [2021-03-24 19:54:39,426 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 450 transitions. [2021-03-24 19:54:39,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 450 transitions. [2021-03-24 19:54:39,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:39,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 450 transitions. [2021-03-24 19:54:39,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 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) [2021-03-24 19:54:39,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 19:54:39,433 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 19:54:39,433 INFO L185 Difference]: Start difference. First operand has 38 places, 33 transitions, 188 flow. Second operand 5 states and 450 transitions. [2021-03-24 19:54:39,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 301 flow [2021-03-24 19:54:39,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 301 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-24 19:54:39,439 INFO L241 Difference]: Finished difference. Result has 44 places, 26 transitions, 164 flow [2021-03-24 19:54:39,439 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2021-03-24 19:54:39,439 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2021-03-24 19:54:39,440 INFO L480 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 164 flow [2021-03-24 19:54:39,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 87.2) internal successors, (436), 5 states have internal predecessors, (436), 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) [2021-03-24 19:54:39,440 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:39,440 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:39,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 19:54:39,440 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:39,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:39,442 INFO L82 PathProgramCache]: Analyzing trace with hash 123747182, now seen corresponding path program 1 times [2021-03-24 19:54:39,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:39,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390448098] [2021-03-24 19:54:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:39,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:39,486 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,489 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-24 19:54:39,490 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-24 19:54:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:39,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390448098] [2021-03-24 19:54:39,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:39,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 19:54:39,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755604954] [2021-03-24 19:54:39,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:39,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:39,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:39,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:39,498 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 111 [2021-03-24 19:54:39,499 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 164 flow. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2021-03-24 19:54:39,499 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:39,499 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 111 [2021-03-24 19:54:39,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:39,517 INFO L129 PetriNetUnfolder]: 7/48 cut-off events. [2021-03-24 19:54:39,518 INFO L130 PetriNetUnfolder]: For 121/153 co-relation queries the response was YES. [2021-03-24 19:54:39,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 48 events. 7/48 cut-off events. For 121/153 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 131 event pairs, 3 based on Foata normal form. 4/51 useless extension candidates. Maximal degree in co-relation 172. Up to 18 conditions per place. [2021-03-24 19:54:39,518 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 4 selfloop transitions, 9 changer transitions 0/27 dead transitions. [2021-03-24 19:54:39,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 27 transitions, 200 flow [2021-03-24 19:54:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 19:54:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 19:54:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2021-03-24 19:54:39,520 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8468468468468469 [2021-03-24 19:54:39,521 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2021-03-24 19:54:39,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2021-03-24 19:54:39,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:39,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2021-03-24 19:54:39,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2021-03-24 19:54:39,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 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) [2021-03-24 19:54:39,523 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 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) [2021-03-24 19:54:39,523 INFO L185 Difference]: Start difference. First operand has 44 places, 26 transitions, 164 flow. Second operand 4 states and 376 transitions. [2021-03-24 19:54:39,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 27 transitions, 200 flow [2021-03-24 19:54:39,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 27 transitions, 159 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-03-24 19:54:39,526 INFO L241 Difference]: Finished difference. Result has 41 places, 27 transitions, 158 flow [2021-03-24 19:54:39,526 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2021-03-24 19:54:39,526 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2021-03-24 19:54:39,526 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 158 flow [2021-03-24 19:54:39,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2021-03-24 19:54:39,527 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:39,527 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:39,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 19:54:39,527 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:39,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:39,527 INFO L82 PathProgramCache]: Analyzing trace with hash 173918420, now seen corresponding path program 1 times [2021-03-24 19:54:39,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:39,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811696850] [2021-03-24 19:54:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:39,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,578 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 19:54:39,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 19:54:39,585 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,586 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:39,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811696850] [2021-03-24 19:54:39,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:39,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 19:54:39,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566861930] [2021-03-24 19:54:39,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:39,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:39,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:39,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:39,590 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 111 [2021-03-24 19:54:39,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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) [2021-03-24 19:54:39,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:39,590 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 111 [2021-03-24 19:54:39,590 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:39,645 INFO L129 PetriNetUnfolder]: 81/196 cut-off events. [2021-03-24 19:54:39,646 INFO L130 PetriNetUnfolder]: For 149/165 co-relation queries the response was YES. [2021-03-24 19:54:39,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 196 events. 81/196 cut-off events. For 149/165 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 957 event pairs, 32 based on Foata normal form. 20/201 useless extension candidates. Maximal degree in co-relation 485. Up to 120 conditions per place. [2021-03-24 19:54:39,649 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 8 selfloop transitions, 8 changer transitions 0/37 dead transitions. [2021-03-24 19:54:39,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 210 flow [2021-03-24 19:54:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-24 19:54:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-24 19:54:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 443 transitions. [2021-03-24 19:54:39,651 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7981981981981981 [2021-03-24 19:54:39,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 443 transitions. [2021-03-24 19:54:39,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 443 transitions. [2021-03-24 19:54:39,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:39,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 443 transitions. [2021-03-24 19:54:39,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 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) [2021-03-24 19:54:39,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 19:54:39,655 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 111.0) internal successors, (666), 6 states have internal predecessors, (666), 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) [2021-03-24 19:54:39,655 INFO L185 Difference]: Start difference. First operand has 41 places, 27 transitions, 158 flow. Second operand 5 states and 443 transitions. [2021-03-24 19:54:39,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 210 flow [2021-03-24 19:54:39,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 200 flow, removed 2 selfloop flow, removed 1 redundant places. [2021-03-24 19:54:39,659 INFO L241 Difference]: Finished difference. Result has 47 places, 34 transitions, 208 flow [2021-03-24 19:54:39,659 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2021-03-24 19:54:39,659 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2021-03-24 19:54:39,659 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 208 flow [2021-03-24 19:54:39,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 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) [2021-03-24 19:54:39,660 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:39,660 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:39,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 19:54:39,660 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash 690833446, now seen corresponding path program 1 times [2021-03-24 19:54:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:39,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473940139] [2021-03-24 19:54:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:39,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,736 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,742 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 19:54:39,743 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 19:54:39,752 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,753 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:39,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473940139] [2021-03-24 19:54:39,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:39,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-24 19:54:39,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85114256] [2021-03-24 19:54:39,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-24 19:54:39,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-24 19:54:39,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-24 19:54:39,755 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 111 [2021-03-24 19:54:39,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 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) [2021-03-24 19:54:39,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:39,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 111 [2021-03-24 19:54:39,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:39,818 INFO L129 PetriNetUnfolder]: 53/157 cut-off events. [2021-03-24 19:54:39,818 INFO L130 PetriNetUnfolder]: For 255/390 co-relation queries the response was YES. [2021-03-24 19:54:39,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 157 events. 53/157 cut-off events. For 255/390 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 756 event pairs, 5 based on Foata normal form. 60/207 useless extension candidates. Maximal degree in co-relation 592. Up to 107 conditions per place. [2021-03-24 19:54:39,820 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 5 selfloop transitions, 15 changer transitions 3/44 dead transitions. [2021-03-24 19:54:39,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 312 flow [2021-03-24 19:54:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 19:54:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 19:54:39,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 620 transitions. [2021-03-24 19:54:39,822 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.797940797940798 [2021-03-24 19:54:39,822 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 620 transitions. [2021-03-24 19:54:39,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 620 transitions. [2021-03-24 19:54:39,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:39,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 620 transitions. [2021-03-24 19:54:39,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 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) [2021-03-24 19:54:39,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 111.0) internal successors, (888), 8 states have internal predecessors, (888), 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) [2021-03-24 19:54:39,826 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 111.0) internal successors, (888), 8 states have internal predecessors, (888), 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) [2021-03-24 19:54:39,827 INFO L185 Difference]: Start difference. First operand has 47 places, 34 transitions, 208 flow. Second operand 7 states and 620 transitions. [2021-03-24 19:54:39,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 312 flow [2021-03-24 19:54:39,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 293 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-03-24 19:54:39,830 INFO L241 Difference]: Finished difference. Result has 53 places, 41 transitions, 288 flow [2021-03-24 19:54:39,830 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2021-03-24 19:54:39,830 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2021-03-24 19:54:39,830 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 288 flow [2021-03-24 19:54:39,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 85.8) internal successors, (429), 5 states have internal predecessors, (429), 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) [2021-03-24 19:54:39,831 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:39,831 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:39,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 19:54:39,831 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:39,831 INFO L82 PathProgramCache]: Analyzing trace with hash 378742169, now seen corresponding path program 1 times [2021-03-24 19:54:39,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:39,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195033196] [2021-03-24 19:54:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:39,910 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:39,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,911 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,914 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:39,914 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:39,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195033196] [2021-03-24 19:54:39,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:39,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 19:54:39,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895665481] [2021-03-24 19:54:39,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-24 19:54:39,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:39,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-24 19:54:39,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-24 19:54:39,920 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 111 [2021-03-24 19:54:39,920 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 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) [2021-03-24 19:54:39,920 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:39,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 111 [2021-03-24 19:54:39,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:39,953 INFO L129 PetriNetUnfolder]: 61/190 cut-off events. [2021-03-24 19:54:39,953 INFO L130 PetriNetUnfolder]: For 549/682 co-relation queries the response was YES. [2021-03-24 19:54:39,953 INFO L84 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 190 events. 61/190 cut-off events. For 549/682 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1049 event pairs, 6 based on Foata normal form. 9/185 useless extension candidates. Maximal degree in co-relation 786. Up to 133 conditions per place. [2021-03-24 19:54:39,954 INFO L132 encePairwiseOnDemand]: 108/111 looper letters, 6 selfloop transitions, 3 changer transitions 13/43 dead transitions. [2021-03-24 19:54:39,954 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 43 transitions, 322 flow [2021-03-24 19:54:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-24 19:54:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-24 19:54:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2021-03-24 19:54:39,956 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8490990990990991 [2021-03-24 19:54:39,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2021-03-24 19:54:39,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2021-03-24 19:54:39,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:39,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2021-03-24 19:54:39,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 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) [2021-03-24 19:54:39,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 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) [2021-03-24 19:54:39,958 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 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) [2021-03-24 19:54:39,958 INFO L185 Difference]: Start difference. First operand has 53 places, 41 transitions, 288 flow. Second operand 4 states and 377 transitions. [2021-03-24 19:54:39,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 43 transitions, 322 flow [2021-03-24 19:54:39,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 43 transitions, 287 flow, removed 13 selfloop flow, removed 2 redundant places. [2021-03-24 19:54:39,962 INFO L241 Difference]: Finished difference. Result has 56 places, 30 transitions, 191 flow [2021-03-24 19:54:39,962 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=56, PETRI_TRANSITIONS=30} [2021-03-24 19:54:39,962 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2021-03-24 19:54:39,963 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 30 transitions, 191 flow [2021-03-24 19:54:39,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 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) [2021-03-24 19:54:39,963 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 19:54:39,963 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 19:54:39,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-24 19:54:39,963 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-24 19:54:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 19:54:39,964 INFO L82 PathProgramCache]: Analyzing trace with hash -494517359, now seen corresponding path program 2 times [2021-03-24 19:54:39,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 19:54:39,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933989939] [2021-03-24 19:54:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 19:54:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 19:54:40,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:40,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:40,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:40,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:40,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:40,019 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 19:54:40,026 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-03-24 19:54:40,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 19:54:40,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 19:54:40,032 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 19:54:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 19:54:40,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933989939] [2021-03-24 19:54:40,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 19:54:40,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-24 19:54:40,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386701852] [2021-03-24 19:54:40,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-24 19:54:40,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 19:54:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-24 19:54:40,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-24 19:54:40,035 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 111 [2021-03-24 19:54:40,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 30 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 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) [2021-03-24 19:54:40,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 19:54:40,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 111 [2021-03-24 19:54:40,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 19:54:40,077 INFO L129 PetriNetUnfolder]: 18/88 cut-off events. [2021-03-24 19:54:40,078 INFO L130 PetriNetUnfolder]: For 253/322 co-relation queries the response was YES. [2021-03-24 19:54:40,078 INFO L84 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 88 events. 18/88 cut-off events. For 253/322 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 358 event pairs, 1 based on Foata normal form. 40/124 useless extension candidates. Maximal degree in co-relation 339. Up to 38 conditions per place. [2021-03-24 19:54:40,078 INFO L132 encePairwiseOnDemand]: 105/111 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2021-03-24 19:54:40,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 32 transitions, 231 flow [2021-03-24 19:54:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-24 19:54:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-24 19:54:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 611 transitions. [2021-03-24 19:54:40,080 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7863577863577863 [2021-03-24 19:54:40,081 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 611 transitions. [2021-03-24 19:54:40,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 611 transitions. [2021-03-24 19:54:40,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 19:54:40,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 611 transitions. [2021-03-24 19:54:40,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.28571428571429) internal successors, (611), 7 states have internal predecessors, (611), 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) [2021-03-24 19:54:40,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 111.0) internal successors, (888), 8 states have internal predecessors, (888), 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) [2021-03-24 19:54:40,084 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 111.0) internal successors, (888), 8 states have internal predecessors, (888), 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) [2021-03-24 19:54:40,084 INFO L185 Difference]: Start difference. First operand has 56 places, 30 transitions, 191 flow. Second operand 7 states and 611 transitions. [2021-03-24 19:54:40,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 32 transitions, 231 flow [2021-03-24 19:54:40,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 32 transitions, 198 flow, removed 9 selfloop flow, removed 8 redundant places. [2021-03-24 19:54:40,086 INFO L241 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2021-03-24 19:54:40,087 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2021-03-24 19:54:40,087 INFO L343 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2021-03-24 19:54:40,087 INFO L480 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2021-03-24 19:54:40,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 85.83333333333333) internal successors, (515), 6 states have internal predecessors, (515), 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) [2021-03-24 19:54:40,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-24 19:54:40,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 07:54:40 BasicIcfg [2021-03-24 19:54:40,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 19:54:40,093 INFO L168 Benchmark]: Toolchain (without parser) took 4091.33 ms. Allocated memory is still 396.4 MB. Free memory was 359.7 MB in the beginning and 336.5 MB in the end (delta: 23.2 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:40,096 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 396.4 MB. Free memory was 378.1 MB in the beginning and 378.0 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 19:54:40,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 417.92 ms. Allocated memory is still 396.4 MB. Free memory was 359.6 MB in the beginning and 358.8 MB in the end (delta: 835.0 kB). Peak memory consumption was 9.3 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:40,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.69 ms. Allocated memory is still 396.4 MB. Free memory was 358.8 MB in the beginning and 356.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:40,097 INFO L168 Benchmark]: Boogie Preprocessor took 17.37 ms. Allocated memory is still 396.4 MB. Free memory was 356.7 MB in the beginning and 355.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:40,098 INFO L168 Benchmark]: RCFGBuilder took 484.74 ms. Allocated memory is still 396.4 MB. Free memory was 355.6 MB in the beginning and 331.5 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-24 19:54:40,098 INFO L168 Benchmark]: TraceAbstraction took 3130.27 ms. Allocated memory is still 396.4 MB. Free memory was 330.5 MB in the beginning and 336.5 MB in the end (delta: -6.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 19:54:40,104 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 396.4 MB. Free memory was 378.1 MB in the beginning and 378.0 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 417.92 ms. Allocated memory is still 396.4 MB. Free memory was 359.6 MB in the beginning and 358.8 MB in the end (delta: 835.0 kB). Peak memory consumption was 9.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 35.69 ms. Allocated memory is still 396.4 MB. Free memory was 358.8 MB in the beginning and 356.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.37 ms. Allocated memory is still 396.4 MB. Free memory was 356.7 MB in the beginning and 355.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 484.74 ms. Allocated memory is still 396.4 MB. Free memory was 355.6 MB in the beginning and 331.5 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3130.27 ms. Allocated memory is still 396.4 MB. Free memory was 330.5 MB in the beginning and 336.5 MB in the end (delta: -6.1 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: 1609.9ms, 67 PlacesBefore, 30 PlacesAfterwards, 58 TransitionsBefore, 20 TransitionsAfterwards, 804 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 38 TotalNumberOfCompositions, 958 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 677, positive: 643, positive conditional: 0, positive unconditional: 643, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 527, positive: 506, positive conditional: 0, positive unconditional: 506, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 527, positive: 506, positive conditional: 0, positive unconditional: 506, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 527, positive: 501, positive conditional: 0, positive unconditional: 501, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 26, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 21, negative conditional: 0, negative unconditional: 21, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 136, positive: 29, positive conditional: 0, positive unconditional: 29, negative: 107, negative conditional: 0, negative unconditional: 107, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 677, positive: 137, positive conditional: 0, positive unconditional: 137, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 527, unknown conditional: 0, unknown unconditional: 527] , Statistics on independence cache: Total cache size (in pairs): 52, Positive cache size: 45, Positive conditional cache size: 0, Positive unconditional cache size: 45, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3017.0ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 508.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1676.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 45 SDtfs, 37 SDslu, 37 SDs, 0 SdLazy, 126 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 91.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 125.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=288occurred in iteration=6, InterpolantAutomatonStates: 41, 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: 22.5ms SsaConstructionTime, 178.6ms SatisfiabilityAnalysisTime, 458.9ms InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 474 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...