./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/security.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/security.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:52:37,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:52:37,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:52:37,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:52:37,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:52:37,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:52:37,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:52:37,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:52:37,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:52:37,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:52:37,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:52:37,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:52:37,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:52:37,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:52:37,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:52:37,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:52:37,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:52:37,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:52:37,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:52:37,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:52:37,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:52:37,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:52:37,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:52:37,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:52:37,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:52:37,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:52:37,953 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:52:37,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:52:37,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:52:37,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:52:37,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:52:37,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:52:37,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:52:37,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:52:37,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:52:37,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:52:37,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:52:37,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:52:37,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:52:37,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:52:37,972 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:52:37,973 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:52:38,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:52:38,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:52:38,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:52:38,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:52:38,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:52:38,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:52:38,045 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:52:38,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:52:38,045 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:52:38,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:52:38,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:52:38,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:52:38,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:52:38,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:52:38,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:52:38,049 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:52:38,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:52:38,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:52:38,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:52:38,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:52:38,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:52:38,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:52:38,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:52:38,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:52:38,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:52:38,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:52:38,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:52:38,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:52:38,053 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:52:38,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:52:38,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:52:38,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:52:38,057 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417dec4be084b2867b601c43d125afd61f7d3912bd17641ca10c0f094ab6abe0 [2021-10-28 08:52:38,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:52:38,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:52:38,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:52:38,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:52:38,507 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:52:38,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/weaver/security.wvr.c [2021-10-28 08:52:38,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/data/113ece715/34b11c7d9035466b8dacb7fe3c198788/FLAG853d7676b [2021-10-28 08:52:39,259 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:52:39,260 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/sv-benchmarks/c/weaver/security.wvr.c [2021-10-28 08:52:39,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/data/113ece715/34b11c7d9035466b8dacb7fe3c198788/FLAG853d7676b [2021-10-28 08:52:39,630 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/data/113ece715/34b11c7d9035466b8dacb7fe3c198788 [2021-10-28 08:52:39,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:52:39,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:52:39,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:52:39,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:52:39,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:52:39,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:52:39" (1/1) ... [2021-10-28 08:52:39,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@794f8663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:39, skipping insertion in model container [2021-10-28 08:52:39,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:52:39" (1/1) ... [2021-10-28 08:52:39,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:52:39,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:52:40,043 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/sv-benchmarks/c/weaver/security.wvr.c[1931,1944] [2021-10-28 08:52:40,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:52:40,060 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:52:40,085 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/sv-benchmarks/c/weaver/security.wvr.c[1931,1944] [2021-10-28 08:52:40,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:52:40,111 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:52:40,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40 WrapperNode [2021-10-28 08:52:40,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:52:40,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:52:40,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:52:40,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:52:40,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:52:40,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:52:40,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:52:40,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:52:40,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:52:40,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:52:40,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:52:40,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:52:40,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (1/1) ... [2021-10-28 08:52:40,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:52:40,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:40,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:52:40,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:52:40,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-28 08:52:40,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-28 08:52:40,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-28 08:52:40,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-28 08:52:40,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:52:40,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:52:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:52:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:52:40,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:52:40,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:52:40,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:52:40,365 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-28 08:52:40,750 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:52:40,750 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-28 08:52:40,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:52:40 BoogieIcfgContainer [2021-10-28 08:52:40,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:52:40,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:52:40,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:52:40,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:52:40,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:52:39" (1/3) ... [2021-10-28 08:52:40,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2dda53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:52:40, skipping insertion in model container [2021-10-28 08:52:40,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:40" (2/3) ... [2021-10-28 08:52:40,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2dda53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:52:40, skipping insertion in model container [2021-10-28 08:52:40,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:52:40" (3/3) ... [2021-10-28 08:52:40,764 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2021-10-28 08:52:40,771 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-28 08:52:40,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:52:40,772 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:52:40,772 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-28 08:52:40,818 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,833 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,834 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,834 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,835 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,835 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,835 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,836 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,836 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,837 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,837 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,837 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,838 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,839 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,839 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,839 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,840 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,840 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,840 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,841 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,841 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,842 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,842 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,842 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,846 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,846 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,847 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,856 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,862 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,863 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-28 08:52:40,890 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-28 08:52:40,979 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:52:40,988 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 08:52:41,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-28 08:52:41,020 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 79 places, 75 transitions, 166 flow [2021-10-28 08:52:41,138 INFO L129 PetriNetUnfolder]: 3/73 cut-off events. [2021-10-28 08:52:41,141 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-28 08:52:41,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 3/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2021-10-28 08:52:41,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 75 transitions, 166 flow [2021-10-28 08:52:41,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 65 transitions, 142 flow [2021-10-28 08:52:41,225 INFO L129 PetriNetUnfolder]: 3/64 cut-off events. [2021-10-28 08:52:41,233 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-28 08:52:41,234 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:41,235 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:41,236 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:41,253 INFO L85 PathProgramCache]: Analyzing trace with hash 928103298, now seen corresponding path program 1 times [2021-10-28 08:52:41,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:41,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253515600] [2021-10-28 08:52:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:41,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:42,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:42,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253515600] [2021-10-28 08:52:42,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253515600] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:42,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:42,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:52:42,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388747403] [2021-10-28 08:52:42,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:52:42,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:52:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:52:42,282 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 75 [2021-10-28 08:52:42,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 142 flow. Second operand has 8 states, 8 states have (on average 57.75) internal successors, (462), 8 states have internal predecessors, (462), 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) [2021-10-28 08:52:42,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:42,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 75 [2021-10-28 08:52:42,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:42,546 INFO L129 PetriNetUnfolder]: 12/120 cut-off events. [2021-10-28 08:52:42,546 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-28 08:52:42,547 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 120 events. 12/120 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 287 event pairs, 4 based on Foata normal form. 3/115 useless extension candidates. Maximal degree in co-relation 99. Up to 26 conditions per place. [2021-10-28 08:52:42,550 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 24 selfloop transitions, 2 changer transitions 8/81 dead transitions. [2021-10-28 08:52:42,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 81 transitions, 242 flow [2021-10-28 08:52:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 598 transitions. [2021-10-28 08:52:42,574 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7973333333333333 [2021-10-28 08:52:42,575 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 598 transitions. [2021-10-28 08:52:42,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 598 transitions. [2021-10-28 08:52:42,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:42,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 598 transitions. [2021-10-28 08:52:42,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.8) internal successors, (598), 10 states have internal predecessors, (598), 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) [2021-10-28 08:52:42,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:42,603 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:42,605 INFO L186 Difference]: Start difference. First operand has 69 places, 65 transitions, 142 flow. Second operand 10 states and 598 transitions. [2021-10-28 08:52:42,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 81 transitions, 242 flow [2021-10-28 08:52:42,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-10-28 08:52:42,617 INFO L242 Difference]: Finished difference. Result has 80 places, 64 transitions, 151 flow [2021-10-28 08:52:42,619 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=151, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2021-10-28 08:52:42,620 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 11 predicate places. [2021-10-28 08:52:42,621 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 151 flow [2021-10-28 08:52:42,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.75) internal successors, (462), 8 states have internal predecessors, (462), 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) [2021-10-28 08:52:42,622 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:42,626 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:42,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:52:42,627 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:42,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1363361579, now seen corresponding path program 1 times [2021-10-28 08:52:42,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:42,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697429047] [2021-10-28 08:52:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:42,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:43,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:43,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697429047] [2021-10-28 08:52:43,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697429047] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:43,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:43,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:43,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444632568] [2021-10-28 08:52:43,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:43,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:43,067 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:43,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 151 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:43,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:43,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:43,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:43,417 INFO L129 PetriNetUnfolder]: 13/171 cut-off events. [2021-10-28 08:52:43,418 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-28 08:52:43,419 INFO L84 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 171 events. 13/171 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 644 event pairs, 0 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 275. Up to 28 conditions per place. [2021-10-28 08:52:43,421 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 27 selfloop transitions, 5 changer transitions 5/82 dead transitions. [2021-10-28 08:52:43,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 82 transitions, 293 flow [2021-10-28 08:52:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:52:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 08:52:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 521 transitions. [2021-10-28 08:52:43,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7718518518518519 [2021-10-28 08:52:43,426 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 521 transitions. [2021-10-28 08:52:43,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 521 transitions. [2021-10-28 08:52:43,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:43,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 521 transitions. [2021-10-28 08:52:43,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.888888888888886) internal successors, (521), 9 states have internal predecessors, (521), 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) [2021-10-28 08:52:43,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:43,435 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:43,435 INFO L186 Difference]: Start difference. First operand has 80 places, 64 transitions, 151 flow. Second operand 9 states and 521 transitions. [2021-10-28 08:52:43,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 82 transitions, 293 flow [2021-10-28 08:52:43,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 82 transitions, 268 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-10-28 08:52:43,443 INFO L242 Difference]: Finished difference. Result has 82 places, 66 transitions, 178 flow [2021-10-28 08:52:43,443 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2021-10-28 08:52:43,444 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2021-10-28 08:52:43,445 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 178 flow [2021-10-28 08:52:43,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:43,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:43,446 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:43,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:52:43,447 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:43,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:43,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1211883793, now seen corresponding path program 2 times [2021-10-28 08:52:43,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:43,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153698464] [2021-10-28 08:52:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:43,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:43,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:43,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153698464] [2021-10-28 08:52:43,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153698464] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:43,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:43,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:43,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166608658] [2021-10-28 08:52:43,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:43,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:43,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:43,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:43,730 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:43,732 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:43,732 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:43,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:43,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:44,168 INFO L129 PetriNetUnfolder]: 15/260 cut-off events. [2021-10-28 08:52:44,168 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-10-28 08:52:44,171 INFO L84 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 260 events. 15/260 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1451 event pairs, 10 based on Foata normal form. 3/255 useless extension candidates. Maximal degree in co-relation 455. Up to 43 conditions per place. [2021-10-28 08:52:44,174 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 30 selfloop transitions, 4 changer transitions 13/92 dead transitions. [2021-10-28 08:52:44,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 92 transitions, 404 flow [2021-10-28 08:52:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:52:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-28 08:52:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 745 transitions. [2021-10-28 08:52:44,180 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.764102564102564 [2021-10-28 08:52:44,181 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 745 transitions. [2021-10-28 08:52:44,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 745 transitions. [2021-10-28 08:52:44,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:44,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 745 transitions. [2021-10-28 08:52:44,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 57.30769230769231) internal successors, (745), 13 states have internal predecessors, (745), 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) [2021-10-28 08:52:44,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 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) [2021-10-28 08:52:44,194 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 75.0) internal successors, (1050), 14 states have internal predecessors, (1050), 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) [2021-10-28 08:52:44,194 INFO L186 Difference]: Start difference. First operand has 82 places, 66 transitions, 178 flow. Second operand 13 states and 745 transitions. [2021-10-28 08:52:44,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 92 transitions, 404 flow [2021-10-28 08:52:44,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 370 flow, removed 10 selfloop flow, removed 5 redundant places. [2021-10-28 08:52:44,208 INFO L242 Difference]: Finished difference. Result has 97 places, 67 transitions, 214 flow [2021-10-28 08:52:44,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=214, PETRI_PLACES=97, PETRI_TRANSITIONS=67} [2021-10-28 08:52:44,209 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 28 predicate places. [2021-10-28 08:52:44,210 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 67 transitions, 214 flow [2021-10-28 08:52:44,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:44,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:44,212 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:44,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:52:44,213 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:44,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:44,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1708637851, now seen corresponding path program 3 times [2021-10-28 08:52:44,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:44,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065519964] [2021-10-28 08:52:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:44,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:44,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:44,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065519964] [2021-10-28 08:52:44,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065519964] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:44,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:44,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:44,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456773630] [2021-10-28 08:52:44,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:44,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:44,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:44,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:44,583 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:44,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 67 transitions, 214 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:44,590 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:44,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:44,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:45,037 INFO L129 PetriNetUnfolder]: 14/296 cut-off events. [2021-10-28 08:52:45,037 INFO L130 PetriNetUnfolder]: For 372/374 co-relation queries the response was YES. [2021-10-28 08:52:45,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 296 events. 14/296 cut-off events. For 372/374 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1781 event pairs, 12 based on Foata normal form. 3/292 useless extension candidates. Maximal degree in co-relation 611. Up to 43 conditions per place. [2021-10-28 08:52:45,044 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 38 selfloop transitions, 9 changer transitions 8/100 dead transitions. [2021-10-28 08:52:45,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 540 flow [2021-10-28 08:52:45,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:52:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-28 08:52:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 808 transitions. [2021-10-28 08:52:45,059 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7695238095238095 [2021-10-28 08:52:45,060 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 808 transitions. [2021-10-28 08:52:45,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 808 transitions. [2021-10-28 08:52:45,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:45,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 808 transitions. [2021-10-28 08:52:45,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.714285714285715) internal successors, (808), 14 states have internal predecessors, (808), 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) [2021-10-28 08:52:45,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 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) [2021-10-28 08:52:45,070 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 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) [2021-10-28 08:52:45,070 INFO L186 Difference]: Start difference. First operand has 97 places, 67 transitions, 214 flow. Second operand 14 states and 808 transitions. [2021-10-28 08:52:45,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 540 flow [2021-10-28 08:52:45,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 100 transitions, 438 flow, removed 50 selfloop flow, removed 10 redundant places. [2021-10-28 08:52:45,087 INFO L242 Difference]: Finished difference. Result has 103 places, 74 transitions, 296 flow [2021-10-28 08:52:45,087 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=296, PETRI_PLACES=103, PETRI_TRANSITIONS=74} [2021-10-28 08:52:45,088 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 34 predicate places. [2021-10-28 08:52:45,088 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 74 transitions, 296 flow [2021-10-28 08:52:45,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:45,089 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:45,090 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:45,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:52:45,090 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:45,093 INFO L85 PathProgramCache]: Analyzing trace with hash -567228287, now seen corresponding path program 4 times [2021-10-28 08:52:45,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:45,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671902288] [2021-10-28 08:52:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:45,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:45,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:45,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671902288] [2021-10-28 08:52:45,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671902288] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:45,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:45,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:45,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889195607] [2021-10-28 08:52:45,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:45,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:45,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:45,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:45,434 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:45,435 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 74 transitions, 296 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:45,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:45,436 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:45,436 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:45,707 INFO L129 PetriNetUnfolder]: 12/279 cut-off events. [2021-10-28 08:52:45,708 INFO L130 PetriNetUnfolder]: For 408/415 co-relation queries the response was YES. [2021-10-28 08:52:45,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 279 events. 12/279 cut-off events. For 408/415 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1657 event pairs, 1 based on Foata normal form. 2/271 useless extension candidates. Maximal degree in co-relation 605. Up to 52 conditions per place. [2021-10-28 08:52:45,711 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 42 selfloop transitions, 6 changer transitions 8/101 dead transitions. [2021-10-28 08:52:45,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 101 transitions, 589 flow [2021-10-28 08:52:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:52:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 08:52:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-10-28 08:52:45,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7851851851851852 [2021-10-28 08:52:45,716 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-10-28 08:52:45,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-10-28 08:52:45,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:45,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-10-28 08:52:45,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 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) [2021-10-28 08:52:45,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:45,727 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:45,727 INFO L186 Difference]: Start difference. First operand has 103 places, 74 transitions, 296 flow. Second operand 9 states and 530 transitions. [2021-10-28 08:52:45,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 101 transitions, 589 flow [2021-10-28 08:52:45,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 525 flow, removed 32 selfloop flow, removed 6 redundant places. [2021-10-28 08:52:45,738 INFO L242 Difference]: Finished difference. Result has 106 places, 75 transitions, 321 flow [2021-10-28 08:52:45,739 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=106, PETRI_TRANSITIONS=75} [2021-10-28 08:52:45,739 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 37 predicate places. [2021-10-28 08:52:45,740 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 75 transitions, 321 flow [2021-10-28 08:52:45,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:45,741 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:45,742 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:45,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:52:45,742 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:45,743 INFO L85 PathProgramCache]: Analyzing trace with hash -623879787, now seen corresponding path program 5 times [2021-10-28 08:52:45,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:45,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254154695] [2021-10-28 08:52:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:45,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:45,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:45,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254154695] [2021-10-28 08:52:45,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254154695] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:45,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:45,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:45,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320373147] [2021-10-28 08:52:45,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:45,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:45,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:45,969 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:45,971 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 75 transitions, 321 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:45,971 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:45,971 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:45,971 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:46,208 INFO L129 PetriNetUnfolder]: 11/266 cut-off events. [2021-10-28 08:52:46,209 INFO L130 PetriNetUnfolder]: For 513/530 co-relation queries the response was YES. [2021-10-28 08:52:46,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 266 events. 11/266 cut-off events. For 513/530 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1523 event pairs, 10 based on Foata normal form. 4/263 useless extension candidates. Maximal degree in co-relation 576. Up to 43 conditions per place. [2021-10-28 08:52:46,212 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 34 selfloop transitions, 5 changer transitions 8/92 dead transitions. [2021-10-28 08:52:46,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 92 transitions, 521 flow [2021-10-28 08:52:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:52:46,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 08:52:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 526 transitions. [2021-10-28 08:52:46,216 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7792592592592592 [2021-10-28 08:52:46,216 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 526 transitions. [2021-10-28 08:52:46,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 526 transitions. [2021-10-28 08:52:46,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:46,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 526 transitions. [2021-10-28 08:52:46,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.44444444444444) internal successors, (526), 9 states have internal predecessors, (526), 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) [2021-10-28 08:52:46,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:46,223 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:46,224 INFO L186 Difference]: Start difference. First operand has 106 places, 75 transitions, 321 flow. Second operand 9 states and 526 transitions. [2021-10-28 08:52:46,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 92 transitions, 521 flow [2021-10-28 08:52:46,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 479 flow, removed 20 selfloop flow, removed 6 redundant places. [2021-10-28 08:52:46,232 INFO L242 Difference]: Finished difference. Result has 108 places, 73 transitions, 300 flow [2021-10-28 08:52:46,233 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=300, PETRI_PLACES=108, PETRI_TRANSITIONS=73} [2021-10-28 08:52:46,233 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-10-28 08:52:46,234 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 73 transitions, 300 flow [2021-10-28 08:52:46,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:46,234 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:46,235 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:46,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:52:46,235 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash -95163099, now seen corresponding path program 6 times [2021-10-28 08:52:46,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:46,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078904671] [2021-10-28 08:52:46,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:46,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:46,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:46,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078904671] [2021-10-28 08:52:46,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078904671] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:46,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:46,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:46,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085706314] [2021-10-28 08:52:46,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:46,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:46,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:46,437 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:46,439 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 73 transitions, 300 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:46,439 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:46,439 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:46,439 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:46,674 INFO L129 PetriNetUnfolder]: 11/232 cut-off events. [2021-10-28 08:52:46,675 INFO L130 PetriNetUnfolder]: For 427/445 co-relation queries the response was YES. [2021-10-28 08:52:46,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 232 events. 11/232 cut-off events. For 427/445 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1208 event pairs, 10 based on Foata normal form. 3/229 useless extension candidates. Maximal degree in co-relation 498. Up to 43 conditions per place. [2021-10-28 08:52:46,678 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 28 selfloop transitions, 2 changer transitions 10/85 dead transitions. [2021-10-28 08:52:46,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 85 transitions, 459 flow [2021-10-28 08:52:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:52:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 08:52:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 521 transitions. [2021-10-28 08:52:46,682 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7718518518518519 [2021-10-28 08:52:46,683 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 521 transitions. [2021-10-28 08:52:46,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 521 transitions. [2021-10-28 08:52:46,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:46,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 521 transitions. [2021-10-28 08:52:46,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.888888888888886) internal successors, (521), 9 states have internal predecessors, (521), 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) [2021-10-28 08:52:46,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:46,690 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:46,690 INFO L186 Difference]: Start difference. First operand has 108 places, 73 transitions, 300 flow. Second operand 9 states and 521 transitions. [2021-10-28 08:52:46,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 85 transitions, 459 flow [2021-10-28 08:52:46,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 85 transitions, 415 flow, removed 16 selfloop flow, removed 8 redundant places. [2021-10-28 08:52:46,698 INFO L242 Difference]: Finished difference. Result has 108 places, 69 transitions, 250 flow [2021-10-28 08:52:46,699 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=108, PETRI_TRANSITIONS=69} [2021-10-28 08:52:46,699 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-10-28 08:52:46,700 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 69 transitions, 250 flow [2021-10-28 08:52:46,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:46,701 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:46,701 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:46,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:52:46,702 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:46,702 INFO L85 PathProgramCache]: Analyzing trace with hash -607430529, now seen corresponding path program 7 times [2021-10-28 08:52:46,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:46,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184527333] [2021-10-28 08:52:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:46,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:46,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:46,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184527333] [2021-10-28 08:52:46,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184527333] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:46,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:46,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:46,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246327959] [2021-10-28 08:52:46,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:46,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:46,967 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:46,968 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 69 transitions, 250 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:46,968 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:46,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:46,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:47,196 INFO L129 PetriNetUnfolder]: 11/192 cut-off events. [2021-10-28 08:52:47,197 INFO L130 PetriNetUnfolder]: For 280/280 co-relation queries the response was YES. [2021-10-28 08:52:47,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 192 events. 11/192 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 830 event pairs, 0 based on Foata normal form. 1/186 useless extension candidates. Maximal degree in co-relation 404. Up to 33 conditions per place. [2021-10-28 08:52:47,199 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 26 selfloop transitions, 5 changer transitions 6/82 dead transitions. [2021-10-28 08:52:47,200 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 82 transitions, 390 flow [2021-10-28 08:52:47,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:52:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 08:52:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2021-10-28 08:52:47,204 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7688888888888888 [2021-10-28 08:52:47,204 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2021-10-28 08:52:47,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2021-10-28 08:52:47,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:47,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2021-10-28 08:52:47,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 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) [2021-10-28 08:52:47,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:47,212 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:47,213 INFO L186 Difference]: Start difference. First operand has 108 places, 69 transitions, 250 flow. Second operand 9 states and 519 transitions. [2021-10-28 08:52:47,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 82 transitions, 390 flow [2021-10-28 08:52:47,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 82 transitions, 351 flow, removed 16 selfloop flow, removed 10 redundant places. [2021-10-28 08:52:47,219 INFO L242 Difference]: Finished difference. Result has 101 places, 68 transitions, 237 flow [2021-10-28 08:52:47,220 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=237, PETRI_PLACES=101, PETRI_TRANSITIONS=68} [2021-10-28 08:52:47,220 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 32 predicate places. [2021-10-28 08:52:47,220 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 68 transitions, 237 flow [2021-10-28 08:52:47,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:47,221 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:47,221 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:47,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:52:47,222 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:47,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:47,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1515168241, now seen corresponding path program 8 times [2021-10-28 08:52:47,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:47,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270708944] [2021-10-28 08:52:47,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:47,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:47,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:47,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270708944] [2021-10-28 08:52:47,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270708944] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:47,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:47,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:47,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841582955] [2021-10-28 08:52:47,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:47,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:47,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:47,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 68 transitions, 237 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:47,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:47,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:47,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:47,696 INFO L129 PetriNetUnfolder]: 11/175 cut-off events. [2021-10-28 08:52:47,697 INFO L130 PetriNetUnfolder]: For 237/237 co-relation queries the response was YES. [2021-10-28 08:52:47,698 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 175 events. 11/175 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 692 event pairs, 0 based on Foata normal form. 1/169 useless extension candidates. Maximal degree in co-relation 369. Up to 33 conditions per place. [2021-10-28 08:52:47,699 INFO L132 encePairwiseOnDemand]: 67/75 looper letters, 26 selfloop transitions, 2 changer transitions 8/81 dead transitions. [2021-10-28 08:52:47,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 81 transitions, 380 flow [2021-10-28 08:52:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:52:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 08:52:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2021-10-28 08:52:47,704 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7703703703703704 [2021-10-28 08:52:47,704 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 520 transitions. [2021-10-28 08:52:47,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 520 transitions. [2021-10-28 08:52:47,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:47,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 520 transitions. [2021-10-28 08:52:47,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.77777777777778) internal successors, (520), 9 states have internal predecessors, (520), 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) [2021-10-28 08:52:47,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:47,711 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:47,711 INFO L186 Difference]: Start difference. First operand has 101 places, 68 transitions, 237 flow. Second operand 9 states and 520 transitions. [2021-10-28 08:52:47,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 81 transitions, 380 flow [2021-10-28 08:52:47,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 81 transitions, 329 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-10-28 08:52:47,720 INFO L242 Difference]: Finished difference. Result has 97 places, 65 transitions, 189 flow [2021-10-28 08:52:47,721 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=189, PETRI_PLACES=97, PETRI_TRANSITIONS=65} [2021-10-28 08:52:47,721 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 28 predicate places. [2021-10-28 08:52:47,722 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 65 transitions, 189 flow [2021-10-28 08:52:47,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:47,723 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:47,723 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:47,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 08:52:47,724 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:47,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1185092991, now seen corresponding path program 9 times [2021-10-28 08:52:47,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:47,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90743749] [2021-10-28 08:52:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:47,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:47,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:47,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:47,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90743749] [2021-10-28 08:52:47,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90743749] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:47,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:47,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:47,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988595802] [2021-10-28 08:52:47,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:47,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:47,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:47,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:47,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:47,928 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 65 transitions, 189 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:47,928 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:47,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:47,928 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:48,151 INFO L129 PetriNetUnfolder]: 10/166 cut-off events. [2021-10-28 08:52:48,152 INFO L130 PetriNetUnfolder]: For 134/134 co-relation queries the response was YES. [2021-10-28 08:52:48,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 166 events. 10/166 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 623 event pairs, 0 based on Foata normal form. 1/160 useless extension candidates. Maximal degree in co-relation 325. Up to 30 conditions per place. [2021-10-28 08:52:48,154 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 21 selfloop transitions, 5 changer transitions 6/77 dead transitions. [2021-10-28 08:52:48,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 77 transitions, 313 flow [2021-10-28 08:52:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:52:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 08:52:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 516 transitions. [2021-10-28 08:52:48,158 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7644444444444445 [2021-10-28 08:52:48,158 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 516 transitions. [2021-10-28 08:52:48,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 516 transitions. [2021-10-28 08:52:48,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:48,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 516 transitions. [2021-10-28 08:52:48,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.333333333333336) internal successors, (516), 9 states have internal predecessors, (516), 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) [2021-10-28 08:52:48,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:48,166 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:48,166 INFO L186 Difference]: Start difference. First operand has 97 places, 65 transitions, 189 flow. Second operand 9 states and 516 transitions. [2021-10-28 08:52:48,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 77 transitions, 313 flow [2021-10-28 08:52:48,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 77 transitions, 280 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-10-28 08:52:48,170 INFO L242 Difference]: Finished difference. Result has 92 places, 65 transitions, 187 flow [2021-10-28 08:52:48,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=187, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2021-10-28 08:52:48,172 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2021-10-28 08:52:48,172 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 187 flow [2021-10-28 08:52:48,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:48,173 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:48,173 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:48,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 08:52:48,174 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 678766821, now seen corresponding path program 10 times [2021-10-28 08:52:48,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:48,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792498696] [2021-10-28 08:52:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:48,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:48,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:48,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:48,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792498696] [2021-10-28 08:52:48,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792498696] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:48,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:48,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 08:52:48,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211820963] [2021-10-28 08:52:48,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:52:48,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:48,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:52:48,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:52:48,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 75 [2021-10-28 08:52:48,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 187 flow. Second operand has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:48,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:48,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 75 [2021-10-28 08:52:48,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:48,584 INFO L129 PetriNetUnfolder]: 10/150 cut-off events. [2021-10-28 08:52:48,584 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-10-28 08:52:48,585 INFO L84 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 150 events. 10/150 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 511 event pairs, 0 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 296. Up to 28 conditions per place. [2021-10-28 08:52:48,586 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 19 selfloop transitions, 3 changer transitions 10/75 dead transitions. [2021-10-28 08:52:48,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 75 transitions, 299 flow [2021-10-28 08:52:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 08:52:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-28 08:52:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 515 transitions. [2021-10-28 08:52:48,591 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.762962962962963 [2021-10-28 08:52:48,591 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 515 transitions. [2021-10-28 08:52:48,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 515 transitions. [2021-10-28 08:52:48,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:48,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 515 transitions. [2021-10-28 08:52:48,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.22222222222222) internal successors, (515), 9 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) [2021-10-28 08:52:48,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:48,600 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 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) [2021-10-28 08:52:48,600 INFO L186 Difference]: Start difference. First operand has 92 places, 65 transitions, 187 flow. Second operand 9 states and 515 transitions. [2021-10-28 08:52:48,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 75 transitions, 299 flow [2021-10-28 08:52:48,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 271 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-10-28 08:52:48,604 INFO L242 Difference]: Finished difference. Result has 92 places, 61 transitions, 161 flow [2021-10-28 08:52:48,605 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=161, PETRI_PLACES=92, PETRI_TRANSITIONS=61} [2021-10-28 08:52:48,605 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 23 predicate places. [2021-10-28 08:52:48,605 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 161 flow [2021-10-28 08:52:48,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.77777777777778) internal successors, (502), 9 states have internal predecessors, (502), 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) [2021-10-28 08:52:48,606 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:48,606 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:48,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 08:52:48,607 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:48,607 INFO L85 PathProgramCache]: Analyzing trace with hash -436103984, now seen corresponding path program 1 times [2021-10-28 08:52:48,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:48,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133629173] [2021-10-28 08:52:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:48,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:48,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:48,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133629173] [2021-10-28 08:52:48,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133629173] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:48,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:48,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:48,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435163487] [2021-10-28 08:52:48,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:48,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:48,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:48,876 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:48,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 61 transitions, 161 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:48,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:48,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:48,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:49,240 INFO L129 PetriNetUnfolder]: 13/165 cut-off events. [2021-10-28 08:52:49,241 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-10-28 08:52:49,241 INFO L84 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 165 events. 13/165 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 627 event pairs, 0 based on Foata normal form. 3/165 useless extension candidates. Maximal degree in co-relation 324. Up to 17 conditions per place. [2021-10-28 08:52:49,243 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 30 selfloop transitions, 3 changer transitions 13/87 dead transitions. [2021-10-28 08:52:49,243 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 87 transitions, 428 flow [2021-10-28 08:52:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 08:52:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-28 08:52:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 771 transitions. [2021-10-28 08:52:49,247 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7342857142857143 [2021-10-28 08:52:49,247 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 771 transitions. [2021-10-28 08:52:49,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 771 transitions. [2021-10-28 08:52:49,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:49,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 771 transitions. [2021-10-28 08:52:49,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.07142857142857) internal successors, (771), 14 states have internal predecessors, (771), 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) [2021-10-28 08:52:49,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 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) [2021-10-28 08:52:49,255 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 75.0) internal successors, (1125), 15 states have internal predecessors, (1125), 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) [2021-10-28 08:52:49,256 INFO L186 Difference]: Start difference. First operand has 92 places, 61 transitions, 161 flow. Second operand 14 states and 771 transitions. [2021-10-28 08:52:49,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 87 transitions, 428 flow [2021-10-28 08:52:49,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 339 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-10-28 08:52:49,260 INFO L242 Difference]: Finished difference. Result has 91 places, 61 transitions, 172 flow [2021-10-28 08:52:49,260 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=172, PETRI_PLACES=91, PETRI_TRANSITIONS=61} [2021-10-28 08:52:49,261 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 22 predicate places. [2021-10-28 08:52:49,261 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 61 transitions, 172 flow [2021-10-28 08:52:49,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:49,262 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:49,262 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:49,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 08:52:49,263 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash -693633984, now seen corresponding path program 2 times [2021-10-28 08:52:49,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:49,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816453577] [2021-10-28 08:52:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:49,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:49,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:49,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816453577] [2021-10-28 08:52:49,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816453577] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:49,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:49,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:49,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288538700] [2021-10-28 08:52:49,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:49,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:49,458 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:49,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 61 transitions, 172 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:49,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:49,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:49,460 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:49,713 INFO L129 PetriNetUnfolder]: 11/156 cut-off events. [2021-10-28 08:52:49,713 INFO L130 PetriNetUnfolder]: For 86/88 co-relation queries the response was YES. [2021-10-28 08:52:49,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 156 events. 11/156 cut-off events. For 86/88 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 537 event pairs, 0 based on Foata normal form. 2/152 useless extension candidates. Maximal degree in co-relation 314. Up to 20 conditions per place. [2021-10-28 08:52:49,715 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 22 selfloop transitions, 5 changer transitions 7/75 dead transitions. [2021-10-28 08:52:49,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 302 flow [2021-10-28 08:52:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:49,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-10-28 08:52:49,718 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-10-28 08:52:49,718 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-10-28 08:52:49,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-10-28 08:52:49,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:49,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-10-28 08:52:49,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 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) [2021-10-28 08:52:49,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:49,724 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:49,724 INFO L186 Difference]: Start difference. First operand has 91 places, 61 transitions, 172 flow. Second operand 10 states and 554 transitions. [2021-10-28 08:52:49,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 302 flow [2021-10-28 08:52:49,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 249 flow, removed 15 selfloop flow, removed 12 redundant places. [2021-10-28 08:52:49,729 INFO L242 Difference]: Finished difference. Result has 85 places, 61 transitions, 169 flow [2021-10-28 08:52:49,730 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=169, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2021-10-28 08:52:49,730 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 16 predicate places. [2021-10-28 08:52:49,730 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 169 flow [2021-10-28 08:52:49,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:49,731 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:49,731 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:49,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 08:52:49,732 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1829380162, now seen corresponding path program 3 times [2021-10-28 08:52:49,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:49,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659287016] [2021-10-28 08:52:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:49,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:49,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:49,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659287016] [2021-10-28 08:52:49,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659287016] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:49,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:49,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:49,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401242688] [2021-10-28 08:52:49,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:49,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:49,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:49,938 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:49,939 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 169 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:49,939 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:49,939 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:49,940 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:50,233 INFO L129 PetriNetUnfolder]: 12/198 cut-off events. [2021-10-28 08:52:50,234 INFO L130 PetriNetUnfolder]: For 120/122 co-relation queries the response was YES. [2021-10-28 08:52:50,235 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 198 events. 12/198 cut-off events. For 120/122 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 851 event pairs, 0 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 393. Up to 27 conditions per place. [2021-10-28 08:52:50,237 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 4 changer transitions 7/87 dead transitions. [2021-10-28 08:52:50,237 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 87 transitions, 433 flow [2021-10-28 08:52:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 562 transitions. [2021-10-28 08:52:50,240 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7493333333333333 [2021-10-28 08:52:50,240 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 562 transitions. [2021-10-28 08:52:50,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 562 transitions. [2021-10-28 08:52:50,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:50,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 562 transitions. [2021-10-28 08:52:50,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.2) internal successors, (562), 10 states have internal predecessors, (562), 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) [2021-10-28 08:52:50,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:50,252 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:50,252 INFO L186 Difference]: Start difference. First operand has 85 places, 61 transitions, 169 flow. Second operand 10 states and 562 transitions. [2021-10-28 08:52:50,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 87 transitions, 433 flow [2021-10-28 08:52:50,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 376 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-10-28 08:52:50,265 INFO L242 Difference]: Finished difference. Result has 88 places, 63 transitions, 186 flow [2021-10-28 08:52:50,266 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=186, PETRI_PLACES=88, PETRI_TRANSITIONS=63} [2021-10-28 08:52:50,266 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 19 predicate places. [2021-10-28 08:52:50,266 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 63 transitions, 186 flow [2021-10-28 08:52:50,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:50,267 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:50,267 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:50,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 08:52:50,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:50,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:50,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1575729550, now seen corresponding path program 4 times [2021-10-28 08:52:50,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:50,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156335354] [2021-10-28 08:52:50,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:50,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:50,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:50,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156335354] [2021-10-28 08:52:50,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156335354] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:50,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:50,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:50,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517951981] [2021-10-28 08:52:50,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:50,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:50,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:50,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:50,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:50,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 63 transitions, 186 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:50,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:50,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:50,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:50,745 INFO L129 PetriNetUnfolder]: 12/259 cut-off events. [2021-10-28 08:52:50,745 INFO L130 PetriNetUnfolder]: For 170/178 co-relation queries the response was YES. [2021-10-28 08:52:50,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 562 conditions, 259 events. 12/259 cut-off events. For 170/178 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1388 event pairs, 3 based on Foata normal form. 2/257 useless extension candidates. Maximal degree in co-relation 525. Up to 49 conditions per place. [2021-10-28 08:52:50,748 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 29 selfloop transitions, 7 changer transitions 7/84 dead transitions. [2021-10-28 08:52:50,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 383 flow [2021-10-28 08:52:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2021-10-28 08:52:50,751 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7453333333333333 [2021-10-28 08:52:50,751 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 559 transitions. [2021-10-28 08:52:50,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 559 transitions. [2021-10-28 08:52:50,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:50,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 559 transitions. [2021-10-28 08:52:50,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.9) internal successors, (559), 10 states have internal predecessors, (559), 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) [2021-10-28 08:52:50,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:50,757 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:50,758 INFO L186 Difference]: Start difference. First operand has 88 places, 63 transitions, 186 flow. Second operand 10 states and 559 transitions. [2021-10-28 08:52:50,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 383 flow [2021-10-28 08:52:50,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 352 flow, removed 10 selfloop flow, removed 6 redundant places. [2021-10-28 08:52:50,762 INFO L242 Difference]: Finished difference. Result has 94 places, 66 transitions, 232 flow [2021-10-28 08:52:50,763 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=232, PETRI_PLACES=94, PETRI_TRANSITIONS=66} [2021-10-28 08:52:50,763 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 25 predicate places. [2021-10-28 08:52:50,763 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 66 transitions, 232 flow [2021-10-28 08:52:50,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:50,764 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:50,764 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:50,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 08:52:50,765 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:50,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2058148696, now seen corresponding path program 5 times [2021-10-28 08:52:50,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:50,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665169951] [2021-10-28 08:52:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:50,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:50,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:50,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665169951] [2021-10-28 08:52:50,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665169951] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:50,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:50,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:50,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082482950] [2021-10-28 08:52:50,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:50,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:50,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:50,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:50,953 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:50,954 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 66 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:50,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:50,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:50,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:51,358 INFO L129 PetriNetUnfolder]: 9/283 cut-off events. [2021-10-28 08:52:51,358 INFO L130 PetriNetUnfolder]: For 306/316 co-relation queries the response was YES. [2021-10-28 08:52:51,359 INFO L84 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 283 events. 9/283 cut-off events. For 306/316 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1615 event pairs, 2 based on Foata normal form. 6/286 useless extension candidates. Maximal degree in co-relation 614. Up to 44 conditions per place. [2021-10-28 08:52:51,360 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 36 selfloop transitions, 10 changer transitions 13/100 dead transitions. [2021-10-28 08:52:51,361 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 100 transitions, 588 flow [2021-10-28 08:52:51,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:52:51,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-28 08:52:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 832 transitions. [2021-10-28 08:52:51,365 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7395555555555555 [2021-10-28 08:52:51,365 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 832 transitions. [2021-10-28 08:52:51,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 832 transitions. [2021-10-28 08:52:51,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:51,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 832 transitions. [2021-10-28 08:52:51,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 55.46666666666667) internal successors, (832), 15 states have internal predecessors, (832), 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) [2021-10-28 08:52:51,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 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) [2021-10-28 08:52:51,375 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 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) [2021-10-28 08:52:51,377 INFO L186 Difference]: Start difference. First operand has 94 places, 66 transitions, 232 flow. Second operand 15 states and 832 transitions. [2021-10-28 08:52:51,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 100 transitions, 588 flow [2021-10-28 08:52:51,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 100 transitions, 542 flow, removed 16 selfloop flow, removed 6 redundant places. [2021-10-28 08:52:51,383 INFO L242 Difference]: Finished difference. Result has 110 places, 72 transitions, 338 flow [2021-10-28 08:52:51,384 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=338, PETRI_PLACES=110, PETRI_TRANSITIONS=72} [2021-10-28 08:52:51,384 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 41 predicate places. [2021-10-28 08:52:51,384 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 72 transitions, 338 flow [2021-10-28 08:52:51,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:51,385 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:51,385 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:51,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 08:52:51,386 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:51,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1161562930, now seen corresponding path program 6 times [2021-10-28 08:52:51,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:51,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742544905] [2021-10-28 08:52:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:51,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:51,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:51,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742544905] [2021-10-28 08:52:51,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742544905] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:51,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:51,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:51,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651678184] [2021-10-28 08:52:51,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:51,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:51,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:51,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:51,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:51,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 72 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:51,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:51,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:51,605 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:52,077 INFO L129 PetriNetUnfolder]: 11/354 cut-off events. [2021-10-28 08:52:52,077 INFO L130 PetriNetUnfolder]: For 692/706 co-relation queries the response was YES. [2021-10-28 08:52:52,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 354 events. 11/354 cut-off events. For 692/706 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2330 event pairs, 6 based on Foata normal form. 4/355 useless extension candidates. Maximal degree in co-relation 908. Up to 42 conditions per place. [2021-10-28 08:52:52,081 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 38 selfloop transitions, 18 changer transitions 13/110 dead transitions. [2021-10-28 08:52:52,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 110 transitions, 787 flow [2021-10-28 08:52:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:52:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 08:52:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 887 transitions. [2021-10-28 08:52:52,099 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7391666666666666 [2021-10-28 08:52:52,099 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 887 transitions. [2021-10-28 08:52:52,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 887 transitions. [2021-10-28 08:52:52,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:52,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 887 transitions. [2021-10-28 08:52:52,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.4375) internal successors, (887), 16 states have internal predecessors, (887), 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) [2021-10-28 08:52:52,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 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) [2021-10-28 08:52:52,107 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 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) [2021-10-28 08:52:52,107 INFO L186 Difference]: Start difference. First operand has 110 places, 72 transitions, 338 flow. Second operand 16 states and 887 transitions. [2021-10-28 08:52:52,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 110 transitions, 787 flow [2021-10-28 08:52:52,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 110 transitions, 710 flow, removed 30 selfloop flow, removed 9 redundant places. [2021-10-28 08:52:52,117 INFO L242 Difference]: Finished difference. Result has 123 places, 80 transitions, 502 flow [2021-10-28 08:52:52,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=502, PETRI_PLACES=123, PETRI_TRANSITIONS=80} [2021-10-28 08:52:52,118 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 54 predicate places. [2021-10-28 08:52:52,118 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 80 transitions, 502 flow [2021-10-28 08:52:52,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:52,119 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:52,119 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:52,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 08:52:52,120 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:52,121 INFO L85 PathProgramCache]: Analyzing trace with hash -265714934, now seen corresponding path program 7 times [2021-10-28 08:52:52,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:52,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906240708] [2021-10-28 08:52:52,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:52,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:52,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:52,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906240708] [2021-10-28 08:52:52,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906240708] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:52,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:52,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:52,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307915469] [2021-10-28 08:52:52,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:52,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:52,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:52,294 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:52,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 80 transitions, 502 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:52,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:52,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:52,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:52,571 INFO L129 PetriNetUnfolder]: 10/343 cut-off events. [2021-10-28 08:52:52,572 INFO L130 PetriNetUnfolder]: For 1123/1143 co-relation queries the response was YES. [2021-10-28 08:52:52,574 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 343 events. 10/343 cut-off events. For 1123/1143 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2240 event pairs, 4 based on Foata normal form. 3/343 useless extension candidates. Maximal degree in co-relation 955. Up to 57 conditions per place. [2021-10-28 08:52:52,576 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 47 selfloop transitions, 7 changer transitions 11/106 dead transitions. [2021-10-28 08:52:52,576 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 106 transitions, 904 flow [2021-10-28 08:52:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-10-28 08:52:52,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-10-28 08:52:52,579 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-10-28 08:52:52,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-10-28 08:52:52,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:52,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-10-28 08:52:52,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 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) [2021-10-28 08:52:52,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:52,585 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:52,585 INFO L186 Difference]: Start difference. First operand has 123 places, 80 transitions, 502 flow. Second operand 10 states and 561 transitions. [2021-10-28 08:52:52,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 106 transitions, 904 flow [2021-10-28 08:52:52,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 106 transitions, 842 flow, removed 31 selfloop flow, removed 8 redundant places. [2021-10-28 08:52:52,596 INFO L242 Difference]: Finished difference. Result has 124 places, 83 transitions, 545 flow [2021-10-28 08:52:52,597 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=545, PETRI_PLACES=124, PETRI_TRANSITIONS=83} [2021-10-28 08:52:52,597 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 55 predicate places. [2021-10-28 08:52:52,597 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 83 transitions, 545 flow [2021-10-28 08:52:52,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:52,598 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:52,598 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:52,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 08:52:52,599 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:52,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:52,600 INFO L85 PathProgramCache]: Analyzing trace with hash -391569458, now seen corresponding path program 8 times [2021-10-28 08:52:52,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:52,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371587345] [2021-10-28 08:52:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:52,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:52,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:52,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371587345] [2021-10-28 08:52:52,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371587345] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:52,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:52,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:52,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889161085] [2021-10-28 08:52:52,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:52,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:52,762 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:52,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 83 transitions, 545 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:52,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:52,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:52,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:53,142 INFO L129 PetriNetUnfolder]: 10/317 cut-off events. [2021-10-28 08:52:53,143 INFO L130 PetriNetUnfolder]: For 1160/1192 co-relation queries the response was YES. [2021-10-28 08:52:53,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 317 events. 10/317 cut-off events. For 1160/1192 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1995 event pairs, 5 based on Foata normal form. 12/326 useless extension candidates. Maximal degree in co-relation 909. Up to 64 conditions per place. [2021-10-28 08:52:53,146 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 31 selfloop transitions, 5 changer transitions 29/106 dead transitions. [2021-10-28 08:52:53,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 106 transitions, 926 flow [2021-10-28 08:52:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:52:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-28 08:52:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2021-10-28 08:52:53,150 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7324444444444445 [2021-10-28 08:52:53,150 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2021-10-28 08:52:53,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2021-10-28 08:52:53,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:53,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2021-10-28 08:52:53,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 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) [2021-10-28 08:52:53,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 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) [2021-10-28 08:52:53,158 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 75.0) internal successors, (1200), 16 states have internal predecessors, (1200), 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) [2021-10-28 08:52:53,158 INFO L186 Difference]: Start difference. First operand has 124 places, 83 transitions, 545 flow. Second operand 15 states and 824 transitions. [2021-10-28 08:52:53,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 106 transitions, 926 flow [2021-10-28 08:52:53,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 106 transitions, 891 flow, removed 16 selfloop flow, removed 5 redundant places. [2021-10-28 08:52:53,170 INFO L242 Difference]: Finished difference. Result has 136 places, 73 transitions, 396 flow [2021-10-28 08:52:53,171 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=396, PETRI_PLACES=136, PETRI_TRANSITIONS=73} [2021-10-28 08:52:53,171 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 67 predicate places. [2021-10-28 08:52:53,171 INFO L470 AbstractCegarLoop]: Abstraction has has 136 places, 73 transitions, 396 flow [2021-10-28 08:52:53,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:53,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:53,173 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:53,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 08:52:53,173 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash -657014896, now seen corresponding path program 9 times [2021-10-28 08:52:53,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:53,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130160517] [2021-10-28 08:52:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:53,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:53,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:53,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130160517] [2021-10-28 08:52:53,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130160517] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:53,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:53,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:53,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72312723] [2021-10-28 08:52:53,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:53,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:53,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:53,345 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:53,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 73 transitions, 396 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:53,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:53,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:53,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:53,736 INFO L129 PetriNetUnfolder]: 7/278 cut-off events. [2021-10-28 08:52:53,736 INFO L130 PetriNetUnfolder]: For 993/1015 co-relation queries the response was YES. [2021-10-28 08:52:53,738 INFO L84 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 278 events. 7/278 cut-off events. For 993/1015 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1601 event pairs, 5 based on Foata normal form. 7/283 useless extension candidates. Maximal degree in co-relation 813. Up to 41 conditions per place. [2021-10-28 08:52:53,740 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 40 selfloop transitions, 11 changer transitions 14/106 dead transitions. [2021-10-28 08:52:53,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 106 transitions, 816 flow [2021-10-28 08:52:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:52:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 08:52:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 890 transitions. [2021-10-28 08:52:53,745 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7416666666666667 [2021-10-28 08:52:53,745 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 890 transitions. [2021-10-28 08:52:53,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 890 transitions. [2021-10-28 08:52:53,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:53,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 890 transitions. [2021-10-28 08:52:53,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.625) internal successors, (890), 16 states have internal predecessors, (890), 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) [2021-10-28 08:52:53,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 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) [2021-10-28 08:52:53,776 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 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) [2021-10-28 08:52:53,777 INFO L186 Difference]: Start difference. First operand has 136 places, 73 transitions, 396 flow. Second operand 16 states and 890 transitions. [2021-10-28 08:52:53,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 106 transitions, 816 flow [2021-10-28 08:52:53,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 106 transitions, 667 flow, removed 69 selfloop flow, removed 15 redundant places. [2021-10-28 08:52:53,787 INFO L242 Difference]: Finished difference. Result has 130 places, 77 transitions, 445 flow [2021-10-28 08:52:53,787 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=445, PETRI_PLACES=130, PETRI_TRANSITIONS=77} [2021-10-28 08:52:53,788 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 61 predicate places. [2021-10-28 08:52:53,788 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 77 transitions, 445 flow [2021-10-28 08:52:53,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:53,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:53,789 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:53,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 08:52:53,789 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:53,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:53,790 INFO L85 PathProgramCache]: Analyzing trace with hash -760491658, now seen corresponding path program 10 times [2021-10-28 08:52:53,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:53,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213734081] [2021-10-28 08:52:53,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:53,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:54,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:54,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213734081] [2021-10-28 08:52:54,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213734081] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:54,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:54,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:54,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661860284] [2021-10-28 08:52:54,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:54,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:54,006 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:54,007 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 77 transitions, 445 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:54,007 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:54,007 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:54,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:54,279 INFO L129 PetriNetUnfolder]: 6/270 cut-off events. [2021-10-28 08:52:54,279 INFO L130 PetriNetUnfolder]: For 802/823 co-relation queries the response was YES. [2021-10-28 08:52:54,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 270 events. 6/270 cut-off events. For 802/823 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1531 event pairs, 5 based on Foata normal form. 5/273 useless extension candidates. Maximal degree in co-relation 758. Up to 51 conditions per place. [2021-10-28 08:52:54,283 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 35 selfloop transitions, 8 changer transitions 10/94 dead transitions. [2021-10-28 08:52:54,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 94 transitions, 709 flow [2021-10-28 08:52:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-10-28 08:52:54,286 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-10-28 08:52:54,286 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-10-28 08:52:54,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-10-28 08:52:54,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:54,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-10-28 08:52:54,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 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) [2021-10-28 08:52:54,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:54,291 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:54,291 INFO L186 Difference]: Start difference. First operand has 130 places, 77 transitions, 445 flow. Second operand 10 states and 561 transitions. [2021-10-28 08:52:54,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 94 transitions, 709 flow [2021-10-28 08:52:54,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 94 transitions, 654 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-10-28 08:52:54,302 INFO L242 Difference]: Finished difference. Result has 129 places, 77 transitions, 440 flow [2021-10-28 08:52:54,302 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=440, PETRI_PLACES=129, PETRI_TRANSITIONS=77} [2021-10-28 08:52:54,302 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 60 predicate places. [2021-10-28 08:52:54,303 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 77 transitions, 440 flow [2021-10-28 08:52:54,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:54,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:54,303 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:54,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 08:52:54,304 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:54,305 INFO L85 PathProgramCache]: Analyzing trace with hash -617420912, now seen corresponding path program 11 times [2021-10-28 08:52:54,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:54,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102201296] [2021-10-28 08:52:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:54,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:54,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:54,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102201296] [2021-10-28 08:52:54,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102201296] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:54,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:54,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:54,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255715280] [2021-10-28 08:52:54,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:54,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:54,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:54,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:54,506 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:54,507 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 77 transitions, 440 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:54,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:54,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:54,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:54,783 INFO L129 PetriNetUnfolder]: 5/261 cut-off events. [2021-10-28 08:52:54,784 INFO L130 PetriNetUnfolder]: For 698/711 co-relation queries the response was YES. [2021-10-28 08:52:54,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 261 events. 5/261 cut-off events. For 698/711 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1432 event pairs, 5 based on Foata normal form. 5/264 useless extension candidates. Maximal degree in co-relation 705. Up to 49 conditions per place. [2021-10-28 08:52:54,787 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 39 selfloop transitions, 8 changer transitions 8/96 dead transitions. [2021-10-28 08:52:54,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 96 transitions, 689 flow [2021-10-28 08:52:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 565 transitions. [2021-10-28 08:52:54,790 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7533333333333333 [2021-10-28 08:52:54,790 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 565 transitions. [2021-10-28 08:52:54,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 565 transitions. [2021-10-28 08:52:54,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:54,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 565 transitions. [2021-10-28 08:52:54,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 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) [2021-10-28 08:52:54,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:54,795 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:54,796 INFO L186 Difference]: Start difference. First operand has 129 places, 77 transitions, 440 flow. Second operand 10 states and 565 transitions. [2021-10-28 08:52:54,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 96 transitions, 689 flow [2021-10-28 08:52:54,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 96 transitions, 612 flow, removed 24 selfloop flow, removed 10 redundant places. [2021-10-28 08:52:54,806 INFO L242 Difference]: Finished difference. Result has 130 places, 79 transitions, 450 flow [2021-10-28 08:52:54,806 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=450, PETRI_PLACES=130, PETRI_TRANSITIONS=79} [2021-10-28 08:52:54,807 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 61 predicate places. [2021-10-28 08:52:54,807 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 79 transitions, 450 flow [2021-10-28 08:52:54,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:54,808 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:54,808 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:54,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 08:52:54,808 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:54,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:54,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2143425732, now seen corresponding path program 12 times [2021-10-28 08:52:54,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:54,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990531300] [2021-10-28 08:52:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:54,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:55,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:55,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990531300] [2021-10-28 08:52:55,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990531300] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:55,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:55,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:55,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338875390] [2021-10-28 08:52:55,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:55,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:55,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:55,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 79 transitions, 450 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:55,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:55,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:55,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:55,273 INFO L129 PetriNetUnfolder]: 5/248 cut-off events. [2021-10-28 08:52:55,273 INFO L130 PetriNetUnfolder]: For 542/555 co-relation queries the response was YES. [2021-10-28 08:52:55,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 248 events. 5/248 cut-off events. For 542/555 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1320 event pairs, 5 based on Foata normal form. 5/251 useless extension candidates. Maximal degree in co-relation 658. Up to 49 conditions per place. [2021-10-28 08:52:55,276 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 34 selfloop transitions, 5 changer transitions 12/92 dead transitions. [2021-10-28 08:52:55,277 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 92 transitions, 653 flow [2021-10-28 08:52:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2021-10-28 08:52:55,280 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.748 [2021-10-28 08:52:55,280 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 561 transitions. [2021-10-28 08:52:55,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 561 transitions. [2021-10-28 08:52:55,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:55,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 561 transitions. [2021-10-28 08:52:55,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.1) internal successors, (561), 10 states have internal predecessors, (561), 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) [2021-10-28 08:52:55,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:55,285 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:55,285 INFO L186 Difference]: Start difference. First operand has 130 places, 79 transitions, 450 flow. Second operand 10 states and 561 transitions. [2021-10-28 08:52:55,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 92 transitions, 653 flow [2021-10-28 08:52:55,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 92 transitions, 617 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-10-28 08:52:55,294 INFO L242 Difference]: Finished difference. Result has 133 places, 75 transitions, 391 flow [2021-10-28 08:52:55,294 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=391, PETRI_PLACES=133, PETRI_TRANSITIONS=75} [2021-10-28 08:52:55,294 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 64 predicate places. [2021-10-28 08:52:55,295 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 75 transitions, 391 flow [2021-10-28 08:52:55,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:55,295 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:55,296 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:55,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-28 08:52:55,296 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash 159473990, now seen corresponding path program 13 times [2021-10-28 08:52:55,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:55,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421649708] [2021-10-28 08:52:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:55,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:55,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:55,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421649708] [2021-10-28 08:52:55,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421649708] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:55,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:55,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:55,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710648791] [2021-10-28 08:52:55,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:55,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:55,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:55,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:55,496 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:55,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 75 transitions, 391 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:55,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:55,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:55,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:55,888 INFO L129 PetriNetUnfolder]: 5/217 cut-off events. [2021-10-28 08:52:55,888 INFO L130 PetriNetUnfolder]: For 469/482 co-relation queries the response was YES. [2021-10-28 08:52:55,890 INFO L84 FinitePrefix]: Finished finitePrefix Result has 605 conditions, 217 events. 5/217 cut-off events. For 469/482 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1040 event pairs, 5 based on Foata normal form. 7/222 useless extension candidates. Maximal degree in co-relation 573. Up to 39 conditions per place. [2021-10-28 08:52:55,891 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 21 selfloop transitions, 2 changer transitions 24/88 dead transitions. [2021-10-28 08:52:55,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 88 transitions, 588 flow [2021-10-28 08:52:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 08:52:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-28 08:52:55,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 875 transitions. [2021-10-28 08:52:55,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7291666666666666 [2021-10-28 08:52:55,895 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 875 transitions. [2021-10-28 08:52:55,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 875 transitions. [2021-10-28 08:52:55,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:55,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 875 transitions. [2021-10-28 08:52:55,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 54.6875) internal successors, (875), 16 states have internal predecessors, (875), 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) [2021-10-28 08:52:55,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 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) [2021-10-28 08:52:55,902 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 75.0) internal successors, (1275), 17 states have internal predecessors, (1275), 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) [2021-10-28 08:52:55,903 INFO L186 Difference]: Start difference. First operand has 133 places, 75 transitions, 391 flow. Second operand 16 states and 875 transitions. [2021-10-28 08:52:55,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 88 transitions, 588 flow [2021-10-28 08:52:55,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 88 transitions, 532 flow, removed 14 selfloop flow, removed 14 redundant places. [2021-10-28 08:52:55,910 INFO L242 Difference]: Finished difference. Result has 133 places, 63 transitions, 231 flow [2021-10-28 08:52:55,911 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=231, PETRI_PLACES=133, PETRI_TRANSITIONS=63} [2021-10-28 08:52:55,911 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 64 predicate places. [2021-10-28 08:52:55,911 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 63 transitions, 231 flow [2021-10-28 08:52:55,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:55,912 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:55,912 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:55,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-10-28 08:52:55,913 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:55,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1717179428, now seen corresponding path program 14 times [2021-10-28 08:52:55,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:55,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809702227] [2021-10-28 08:52:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:55,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:56,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:56,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809702227] [2021-10-28 08:52:56,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809702227] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:56,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:56,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:56,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264407767] [2021-10-28 08:52:56,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:56,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:56,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:56,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:56,097 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:56,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 63 transitions, 231 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:56,098 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:56,098 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:56,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:56,345 INFO L129 PetriNetUnfolder]: 4/165 cut-off events. [2021-10-28 08:52:56,345 INFO L130 PetriNetUnfolder]: For 277/283 co-relation queries the response was YES. [2021-10-28 08:52:56,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 165 events. 4/165 cut-off events. For 277/283 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 616 event pairs, 2 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 413. Up to 30 conditions per place. [2021-10-28 08:52:56,347 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 25 selfloop transitions, 6 changer transitions 7/79 dead transitions. [2021-10-28 08:52:56,347 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 79 transitions, 435 flow [2021-10-28 08:52:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-10-28 08:52:56,350 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-10-28 08:52:56,350 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-10-28 08:52:56,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-10-28 08:52:56,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:56,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-10-28 08:52:56,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 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) [2021-10-28 08:52:56,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:56,356 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:56,356 INFO L186 Difference]: Start difference. First operand has 133 places, 63 transitions, 231 flow. Second operand 10 states and 554 transitions. [2021-10-28 08:52:56,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 79 transitions, 435 flow [2021-10-28 08:52:56,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 79 transitions, 363 flow, removed 29 selfloop flow, removed 17 redundant places. [2021-10-28 08:52:56,361 INFO L242 Difference]: Finished difference. Result has 104 places, 65 transitions, 235 flow [2021-10-28 08:52:56,361 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=235, PETRI_PLACES=104, PETRI_TRANSITIONS=65} [2021-10-28 08:52:56,362 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 35 predicate places. [2021-10-28 08:52:56,362 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 65 transitions, 235 flow [2021-10-28 08:52:56,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:56,363 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:56,363 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:56,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-28 08:52:56,363 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1692819958, now seen corresponding path program 15 times [2021-10-28 08:52:56,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:56,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346792007] [2021-10-28 08:52:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:56,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:56,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:56,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346792007] [2021-10-28 08:52:56,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346792007] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:56,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:56,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:56,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431306946] [2021-10-28 08:52:56,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:56,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:56,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:56,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:56,546 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:56,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 65 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:56,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:56,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:56,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:56,766 INFO L129 PetriNetUnfolder]: 3/167 cut-off events. [2021-10-28 08:52:56,766 INFO L130 PetriNetUnfolder]: For 177/183 co-relation queries the response was YES. [2021-10-28 08:52:56,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 167 events. 3/167 cut-off events. For 177/183 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 648 event pairs, 2 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 393. Up to 25 conditions per place. [2021-10-28 08:52:56,770 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 26 selfloop transitions, 6 changer transitions 7/80 dead transitions. [2021-10-28 08:52:56,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 80 transitions, 406 flow [2021-10-28 08:52:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 555 transitions. [2021-10-28 08:52:56,776 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.74 [2021-10-28 08:52:56,776 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 555 transitions. [2021-10-28 08:52:56,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 555 transitions. [2021-10-28 08:52:56,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:56,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 555 transitions. [2021-10-28 08:52:56,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.5) internal successors, (555), 10 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) [2021-10-28 08:52:56,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:56,782 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:56,782 INFO L186 Difference]: Start difference. First operand has 104 places, 65 transitions, 235 flow. Second operand 10 states and 555 transitions. [2021-10-28 08:52:56,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 80 transitions, 406 flow [2021-10-28 08:52:56,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 80 transitions, 381 flow, removed 8 selfloop flow, removed 6 redundant places. [2021-10-28 08:52:56,787 INFO L242 Difference]: Finished difference. Result has 110 places, 66 transitions, 261 flow [2021-10-28 08:52:56,788 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=261, PETRI_PLACES=110, PETRI_TRANSITIONS=66} [2021-10-28 08:52:56,788 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 41 predicate places. [2021-10-28 08:52:56,788 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 66 transitions, 261 flow [2021-10-28 08:52:56,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:56,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:56,789 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:56,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-28 08:52:56,790 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1241301456, now seen corresponding path program 16 times [2021-10-28 08:52:56,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:56,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260799286] [2021-10-28 08:52:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:56,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:56,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:56,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260799286] [2021-10-28 08:52:56,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260799286] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:56,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:56,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:56,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831409789] [2021-10-28 08:52:56,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:56,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:56,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:56,984 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:56,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 66 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:56,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:56,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:56,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:57,224 INFO L129 PetriNetUnfolder]: 2/162 cut-off events. [2021-10-28 08:52:57,225 INFO L130 PetriNetUnfolder]: For 228/236 co-relation queries the response was YES. [2021-10-28 08:52:57,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 162 events. 2/162 cut-off events. For 228/236 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 611 event pairs, 2 based on Foata normal form. 4/165 useless extension candidates. Maximal degree in co-relation 393. Up to 25 conditions per place. [2021-10-28 08:52:57,227 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 29 selfloop transitions, 7 changer transitions 4/81 dead transitions. [2021-10-28 08:52:57,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 81 transitions, 426 flow [2021-10-28 08:52:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 558 transitions. [2021-10-28 08:52:57,230 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.744 [2021-10-28 08:52:57,230 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 558 transitions. [2021-10-28 08:52:57,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 558 transitions. [2021-10-28 08:52:57,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:57,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 558 transitions. [2021-10-28 08:52:57,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.8) internal successors, (558), 10 states have internal predecessors, (558), 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) [2021-10-28 08:52:57,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:57,235 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:57,235 INFO L186 Difference]: Start difference. First operand has 110 places, 66 transitions, 261 flow. Second operand 10 states and 558 transitions. [2021-10-28 08:52:57,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 81 transitions, 426 flow [2021-10-28 08:52:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 81 transitions, 363 flow, removed 21 selfloop flow, removed 9 redundant places. [2021-10-28 08:52:57,240 INFO L242 Difference]: Finished difference. Result has 112 places, 68 transitions, 277 flow [2021-10-28 08:52:57,241 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=277, PETRI_PLACES=112, PETRI_TRANSITIONS=68} [2021-10-28 08:52:57,241 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 43 predicate places. [2021-10-28 08:52:57,241 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 68 transitions, 277 flow [2021-10-28 08:52:57,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:57,242 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:57,242 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:57,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-10-28 08:52:57,242 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:57,243 INFO L85 PathProgramCache]: Analyzing trace with hash 544611928, now seen corresponding path program 17 times [2021-10-28 08:52:57,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:57,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510979021] [2021-10-28 08:52:57,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:57,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:57,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:57,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510979021] [2021-10-28 08:52:57,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510979021] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:57,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:57,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:57,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146714894] [2021-10-28 08:52:57,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:57,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:57,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:57,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:57,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:57,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 68 transitions, 277 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:57,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:57,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:57,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:57,625 INFO L129 PetriNetUnfolder]: 2/152 cut-off events. [2021-10-28 08:52:57,625 INFO L130 PetriNetUnfolder]: For 166/174 co-relation queries the response was YES. [2021-10-28 08:52:57,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 152 events. 2/152 cut-off events. For 166/174 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 534 event pairs, 2 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 365. Up to 25 conditions per place. [2021-10-28 08:52:57,627 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 24 selfloop transitions, 4 changer transitions 8/77 dead transitions. [2021-10-28 08:52:57,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 77 transitions, 394 flow [2021-10-28 08:52:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 554 transitions. [2021-10-28 08:52:57,630 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7386666666666667 [2021-10-28 08:52:57,630 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 554 transitions. [2021-10-28 08:52:57,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 554 transitions. [2021-10-28 08:52:57,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:57,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 554 transitions. [2021-10-28 08:52:57,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 55.4) internal successors, (554), 10 states have internal predecessors, (554), 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) [2021-10-28 08:52:57,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:57,635 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:57,636 INFO L186 Difference]: Start difference. First operand has 112 places, 68 transitions, 277 flow. Second operand 10 states and 554 transitions. [2021-10-28 08:52:57,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 77 transitions, 394 flow [2021-10-28 08:52:57,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 77 transitions, 364 flow, removed 11 selfloop flow, removed 6 redundant places. [2021-10-28 08:52:57,641 INFO L242 Difference]: Finished difference. Result has 116 places, 65 transitions, 240 flow [2021-10-28 08:52:57,641 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=240, PETRI_PLACES=116, PETRI_TRANSITIONS=65} [2021-10-28 08:52:57,642 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 47 predicate places. [2021-10-28 08:52:57,642 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 65 transitions, 240 flow [2021-10-28 08:52:57,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:57,643 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:57,643 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:57,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-28 08:52:57,643 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1503460560, now seen corresponding path program 18 times [2021-10-28 08:52:57,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:57,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127853395] [2021-10-28 08:52:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:57,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:57,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:57,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127853395] [2021-10-28 08:52:57,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127853395] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:57,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:57,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:57,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891701496] [2021-10-28 08:52:57,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:57,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:57,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:57,837 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:57,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 65 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:57,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:57,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:57,839 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:58,054 INFO L129 PetriNetUnfolder]: 2/125 cut-off events. [2021-10-28 08:52:58,054 INFO L130 PetriNetUnfolder]: For 123/129 co-relation queries the response was YES. [2021-10-28 08:52:58,055 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 125 events. 2/125 cut-off events. For 123/129 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 337 event pairs, 2 based on Foata normal form. 3/127 useless extension candidates. Maximal degree in co-relation 293. Up to 20 conditions per place. [2021-10-28 08:52:58,056 INFO L132 encePairwiseOnDemand]: 66/75 looper letters, 17 selfloop transitions, 3 changer transitions 10/71 dead transitions. [2021-10-28 08:52:58,056 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 71 transitions, 336 flow [2021-10-28 08:52:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 548 transitions. [2021-10-28 08:52:58,058 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7306666666666667 [2021-10-28 08:52:58,059 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 548 transitions. [2021-10-28 08:52:58,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 548 transitions. [2021-10-28 08:52:58,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:58,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 548 transitions. [2021-10-28 08:52:58,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.8) internal successors, (548), 10 states have internal predecessors, (548), 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) [2021-10-28 08:52:58,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:58,064 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:58,064 INFO L186 Difference]: Start difference. First operand has 116 places, 65 transitions, 240 flow. Second operand 10 states and 548 transitions. [2021-10-28 08:52:58,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 71 transitions, 336 flow [2021-10-28 08:52:58,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 71 transitions, 300 flow, removed 11 selfloop flow, removed 13 redundant places. [2021-10-28 08:52:58,068 INFO L242 Difference]: Finished difference. Result has 108 places, 61 transitions, 182 flow [2021-10-28 08:52:58,068 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=108, PETRI_TRANSITIONS=61} [2021-10-28 08:52:58,071 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 39 predicate places. [2021-10-28 08:52:58,072 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 61 transitions, 182 flow [2021-10-28 08:52:58,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:58,072 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:58,073 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:58,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-28 08:52:58,073 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -616209836, now seen corresponding path program 19 times [2021-10-28 08:52:58,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:58,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009863889] [2021-10-28 08:52:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:58,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:58,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:58,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009863889] [2021-10-28 08:52:58,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009863889] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:58,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:58,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:58,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933634055] [2021-10-28 08:52:58,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:58,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:58,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:58,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:58,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 61 transitions, 182 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:58,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:58,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:58,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:58,447 INFO L129 PetriNetUnfolder]: 0/114 cut-off events. [2021-10-28 08:52:58,448 INFO L130 PetriNetUnfolder]: For 47/49 co-relation queries the response was YES. [2021-10-28 08:52:58,448 INFO L84 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 114 events. 0/114 cut-off events. For 47/49 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 266 event pairs, 0 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-10-28 08:52:58,449 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 14 selfloop transitions, 6 changer transitions 7/68 dead transitions. [2021-10-28 08:52:58,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 68 transitions, 280 flow [2021-10-28 08:52:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 545 transitions. [2021-10-28 08:52:58,452 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7266666666666667 [2021-10-28 08:52:58,452 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 545 transitions. [2021-10-28 08:52:58,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 545 transitions. [2021-10-28 08:52:58,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:58,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 545 transitions. [2021-10-28 08:52:58,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.5) internal successors, (545), 10 states have internal predecessors, (545), 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) [2021-10-28 08:52:58,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:58,457 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:58,457 INFO L186 Difference]: Start difference. First operand has 108 places, 61 transitions, 182 flow. Second operand 10 states and 545 transitions. [2021-10-28 08:52:58,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 68 transitions, 280 flow [2021-10-28 08:52:58,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 68 transitions, 249 flow, removed 9 selfloop flow, removed 12 redundant places. [2021-10-28 08:52:58,462 INFO L242 Difference]: Finished difference. Result has 98 places, 61 transitions, 178 flow [2021-10-28 08:52:58,462 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=98, PETRI_TRANSITIONS=61} [2021-10-28 08:52:58,463 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 29 predicate places. [2021-10-28 08:52:58,464 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 61 transitions, 178 flow [2021-10-28 08:52:58,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:58,465 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-28 08:52:58,465 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:58,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-10-28 08:52:58,465 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-28 08:52:58,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash 367647626, now seen corresponding path program 20 times [2021-10-28 08:52:58,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:58,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977861595] [2021-10-28 08:52:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:58,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:58,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:58,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977861595] [2021-10-28 08:52:58,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977861595] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:58,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:58,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 08:52:58,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550573262] [2021-10-28 08:52:58,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 08:52:58,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 08:52:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:52:58,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2021-10-28 08:52:58,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 61 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:58,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-28 08:52:58,641 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2021-10-28 08:52:58,641 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-28 08:52:58,821 INFO L129 PetriNetUnfolder]: 0/94 cut-off events. [2021-10-28 08:52:58,821 INFO L130 PetriNetUnfolder]: For 27/29 co-relation queries the response was YES. [2021-10-28 08:52:58,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 94 events. 0/94 cut-off events. For 27/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 0 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2021-10-28 08:52:58,822 INFO L132 encePairwiseOnDemand]: 65/75 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2021-10-28 08:52:58,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 62 transitions, 244 flow [2021-10-28 08:52:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:52:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-28 08:52:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 541 transitions. [2021-10-28 08:52:58,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7213333333333334 [2021-10-28 08:52:58,824 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 541 transitions. [2021-10-28 08:52:58,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 541 transitions. [2021-10-28 08:52:58,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 08:52:58,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 541 transitions. [2021-10-28 08:52:58,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 54.1) internal successors, (541), 10 states have internal predecessors, (541), 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) [2021-10-28 08:52:58,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:58,828 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 75.0) internal successors, (825), 11 states have internal predecessors, (825), 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) [2021-10-28 08:52:58,828 INFO L186 Difference]: Start difference. First operand has 98 places, 61 transitions, 178 flow. Second operand 10 states and 541 transitions. [2021-10-28 08:52:58,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 62 transitions, 244 flow [2021-10-28 08:52:58,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 62 transitions, 228 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-10-28 08:52:58,831 INFO L242 Difference]: Finished difference. Result has 95 places, 0 transitions, 0 flow [2021-10-28 08:52:58,832 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=95, PETRI_TRANSITIONS=0} [2021-10-28 08:52:58,832 INFO L334 CegarLoopForPetriNet]: 69 programPoint places, 26 predicate places. [2021-10-28 08:52:58,832 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 0 transitions, 0 flow [2021-10-28 08:52:58,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.8) internal successors, (538), 10 states have internal predecessors, (538), 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) [2021-10-28 08:52:58,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:52:58,836 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-28 08:52:58,836 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-28 08:52:58,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 08:52:58,841 INFO L731 BasicCegarLoop]: Path program histogram: [20, 10, 1] [2021-10-28 08:52:58,844 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-28 08:52:58,844 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:52:58,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:52:58 BasicIcfg [2021-10-28 08:52:58,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:52:58,848 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:52:58,848 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:52:58,849 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:52:58,849 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:52:40" (3/4) ... [2021-10-28 08:52:58,853 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 08:52:58,861 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-28 08:52:58,865 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-28 08:52:58,871 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-28 08:52:58,871 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 08:52:58,872 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:52:58,872 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 08:52:58,910 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 08:52:58,911 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:52:58,913 INFO L168 Benchmark]: Toolchain (without parser) took 19274.24 ms. Allocated memory was 109.1 MB in the beginning and 138.4 MB in the end (delta: 29.4 MB). Free memory was 73.8 MB in the beginning and 114.0 MB in the end (delta: -40.2 MB). Peak memory consumption was 67.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:58,913 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory was 89.9 MB in the beginning and 89.9 MB in the end (delta: 53.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:52:58,914 INFO L168 Benchmark]: CACSL2BoogieTranslator took 469.14 ms. Allocated memory is still 109.1 MB. Free memory was 73.6 MB in the beginning and 84.8 MB in the end (delta: -11.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:58,914 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.57 ms. Allocated memory is still 109.1 MB. Free memory was 84.8 MB in the beginning and 83.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:58,915 INFO L168 Benchmark]: Boogie Preprocessor took 65.90 ms. Allocated memory is still 109.1 MB. Free memory was 83.3 MB in the beginning and 82.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:52:58,915 INFO L168 Benchmark]: RCFGBuilder took 523.51 ms. Allocated memory is still 109.1 MB. Free memory was 82.3 MB in the beginning and 71.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:58,916 INFO L168 Benchmark]: TraceAbstraction took 18092.05 ms. Allocated memory was 109.1 MB in the beginning and 138.4 MB in the end (delta: 29.4 MB). Free memory was 70.8 MB in the beginning and 36.7 MB in the end (delta: 34.1 MB). Peak memory consumption was 63.8 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:58,917 INFO L168 Benchmark]: Witness Printer took 62.79 ms. Allocated memory is still 138.4 MB. Free memory was 36.7 MB in the beginning and 114.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:58,919 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory was 89.9 MB in the beginning and 89.9 MB in the end (delta: 53.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 469.14 ms. Allocated memory is still 109.1 MB. Free memory was 73.6 MB in the beginning and 84.8 MB in the end (delta: -11.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.57 ms. Allocated memory is still 109.1 MB. Free memory was 84.8 MB in the beginning and 83.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.90 ms. Allocated memory is still 109.1 MB. Free memory was 83.3 MB in the beginning and 82.3 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 523.51 ms. Allocated memory is still 109.1 MB. Free memory was 82.3 MB in the beginning and 71.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18092.05 ms. Allocated memory was 109.1 MB in the beginning and 138.4 MB in the end (delta: 29.4 MB). Free memory was 70.8 MB in the beginning and 36.7 MB in the end (delta: 34.1 MB). Peak memory consumption was 63.8 MB. Max. memory is 16.1 GB. * Witness Printer took 62.79 ms. Allocated memory is still 138.4 MB. Free memory was 36.7 MB in the beginning and 114.0 MB in the end (delta: -77.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 76]: 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 with 1 thread instances CFG has 5 procedures, 95 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.8s, OverallIterations: 31, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 686 SDtfs, 1285 SDslu, 3094 SDs, 0 SdLazy, 2345 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 523 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=545occurred in iteration=18, InterpolantAutomatonStates: 341, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 1767 NumberOfCodeBlocks, 1767 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1736 ConstructedInterpolants, 0 QuantifiedInterpolants, 10171 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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! [2021-10-28 08:52:58,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_693bb0e0-c48c-4994-9da0-5f8e1d06063d/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...