./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:47:29,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:47:29,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:47:29,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:47:29,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:47:29,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:47:29,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:47:29,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:47:29,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:47:29,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:47:29,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:47:29,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:47:29,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:47:29,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:47:29,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:47:29,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:47:29,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:47:29,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:47:29,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:47:29,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:47:29,813 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:47:29,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:47:29,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:47:29,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:47:29,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:47:29,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:47:29,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:47:29,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:47:29,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:47:29,838 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:47:29,839 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:47:29,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:47:29,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:47:29,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:47:29,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:47:29,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:47:29,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:47:29,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:47:29,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:47:29,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:47:29,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:47:29,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:47:29,855 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:47:29,888 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:47:29,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:47:29,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:47:29,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:47:29,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:47:29,890 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:47:29,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:47:29,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:47:29,892 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:47:29,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:47:29,893 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:47:29,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:47:29,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:47:29,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:47:29,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:47:29,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:47:29,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:47:29,894 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:47:29,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:47:29,894 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:47:29,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:47:29,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:47:29,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:47:29,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:47:29,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:47:29,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:47:29,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:47:29,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:47:29,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:47:29,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:47:29,897 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:47:29,897 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:47:29,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:47:29,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2022-07-21 08:47:30,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:47:30,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:47:30,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:47:30,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:47:30,253 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:47:30,254 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-07-21 08:47:30,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b81bd4b/f4c13649b43244fba9d8ac0cf53cd401/FLAG7d524cfa3 [2022-07-21 08:47:30,865 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:47:30,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2022-07-21 08:47:30,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b81bd4b/f4c13649b43244fba9d8ac0cf53cd401/FLAG7d524cfa3 [2022-07-21 08:47:31,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1b81bd4b/f4c13649b43244fba9d8ac0cf53cd401 [2022-07-21 08:47:31,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:47:31,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:47:31,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:47:31,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:47:31,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:47:31,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c03a545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31, skipping insertion in model container [2022-07-21 08:47:31,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:47:31,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:47:31,360 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-07-21 08:47:31,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:47:31,691 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:47:31,706 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-07-21 08:47:31,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:47:31,833 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:47:31,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31 WrapperNode [2022-07-21 08:47:31,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:47:31,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:47:31,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:47:31,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:47:31,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,891 INFO L137 Inliner]: procedures = 364, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-21 08:47:31,892 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:47:31,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:47:31,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:47:31,893 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:47:31,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:47:31,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:47:31,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:47:31,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:47:31,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (1/1) ... [2022-07-21 08:47:31,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:47:31,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:31,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:47:31,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:47:32,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:47:32,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:47:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:47:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:47:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:47:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:47:32,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-07-21 08:47:32,017 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-07-21 08:47:32,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:47:32,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:47:32,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:47:32,020 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:47:32,176 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:47:32,177 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:47:32,407 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:47:32,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:47:32,414 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 08:47:32,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:47:32 BoogieIcfgContainer [2022-07-21 08:47:32,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:47:32,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:47:32,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:47:32,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:47:32,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:47:31" (1/3) ... [2022-07-21 08:47:32,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4999a9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:47:32, skipping insertion in model container [2022-07-21 08:47:32,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:31" (2/3) ... [2022-07-21 08:47:32,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4999a9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:47:32, skipping insertion in model container [2022-07-21 08:47:32,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:47:32" (3/3) ... [2022-07-21 08:47:32,424 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-07-21 08:47:32,429 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:47:32,437 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:47:32,437 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:47:32,437 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:47:32,501 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-21 08:47:32,549 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 94 places, 97 transitions, 202 flow [2022-07-21 08:47:32,614 INFO L129 PetriNetUnfolder]: 7/96 cut-off events. [2022-07-21 08:47:32,615 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:47:32,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 7/96 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-07-21 08:47:32,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 97 transitions, 202 flow [2022-07-21 08:47:32,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 86 transitions, 178 flow [2022-07-21 08:47:32,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:47:32,646 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2685b970, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1c532377 [2022-07-21 08:47:32,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 08:47:32,666 INFO L129 PetriNetUnfolder]: 6/85 cut-off events. [2022-07-21 08:47:32,666 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:47:32,667 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:32,667 INFO L200 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, 1] [2022-07-21 08:47:32,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:47:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:32,673 INFO L85 PathProgramCache]: Analyzing trace with hash -137135436, now seen corresponding path program 1 times [2022-07-21 08:47:32,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:32,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501697976] [2022-07-21 08:47:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:32,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:47:32,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:32,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501697976] [2022-07-21 08:47:32,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501697976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:32,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:47:32,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:47:32,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201093856] [2022-07-21 08:47:32,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:32,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:47:32,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:47:32,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:47:32,954 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-07-21 08:47:32,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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) [2022-07-21 08:47:32,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:32,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-07-21 08:47:32,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:33,020 INFO L129 PetriNetUnfolder]: 2/87 cut-off events. [2022-07-21 08:47:33,022 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:47:33,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 87 events. 2/87 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 10/94 useless extension candidates. Maximal degree in co-relation 50. Up to 10 conditions per place. [2022-07-21 08:47:33,025 INFO L132 encePairwiseOnDemand]: 90/97 looper letters, 10 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-07-21 08:47:33,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 196 flow [2022-07-21 08:47:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:47:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:47:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-07-21 08:47:33,048 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8900343642611683 [2022-07-21 08:47:33,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2022-07-21 08:47:33,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2022-07-21 08:47:33,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:33,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2022-07-21 08:47:33,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2022-07-21 08:47:33,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:47:33,070 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:47:33,072 INFO L186 Difference]: Start difference. First operand has 84 places, 86 transitions, 178 flow. Second operand 3 states and 259 transitions. [2022-07-21 08:47:33,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 196 flow [2022-07-21 08:47:33,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:47:33,083 INFO L242 Difference]: Finished difference. Result has 83 places, 81 transitions, 174 flow [2022-07-21 08:47:33,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2022-07-21 08:47:33,088 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2022-07-21 08:47:33,089 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 174 flow [2022-07-21 08:47:33,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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) [2022-07-21 08:47:33,090 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:33,090 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:47:33,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:47:33,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:47:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:33,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1409393791, now seen corresponding path program 1 times [2022-07-21 08:47:33,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:33,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90018602] [2022-07-21 08:47:33,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:33,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:47:33,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:33,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90018602] [2022-07-21 08:47:33,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90018602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:47:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742491182] [2022-07-21 08:47:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:33,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:33,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:33,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:47:33,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 08:47:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:33,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 08:47:33,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:47:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:47:33,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 08:47:33,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742491182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:33,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 08:47:33,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-07-21 08:47:33,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175945815] [2022-07-21 08:47:33,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:33,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:47:33,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:33,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:47:33,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:47:33,398 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 97 [2022-07-21 08:47:33,399 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-07-21 08:47:33,399 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:33,399 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 97 [2022-07-21 08:47:33,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:33,426 INFO L129 PetriNetUnfolder]: 2/97 cut-off events. [2022-07-21 08:47:33,427 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:47:33,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 97 events. 2/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 81. Up to 9 conditions per place. [2022-07-21 08:47:33,433 INFO L132 encePairwiseOnDemand]: 94/97 looper letters, 9 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-07-21 08:47:33,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 84 transitions, 202 flow [2022-07-21 08:47:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:47:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:47:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-07-21 08:47:33,436 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8762886597938144 [2022-07-21 08:47:33,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-07-21 08:47:33,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-07-21 08:47:33,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:33,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-07-21 08:47:33,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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) [2022-07-21 08:47:33,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:47:33,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:47:33,440 INFO L186 Difference]: Start difference. First operand has 83 places, 81 transitions, 174 flow. Second operand 3 states and 255 transitions. [2022-07-21 08:47:33,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 84 transitions, 202 flow [2022-07-21 08:47:33,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 84 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:47:33,444 INFO L242 Difference]: Finished difference. Result has 85 places, 82 transitions, 184 flow [2022-07-21 08:47:33,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2022-07-21 08:47:33,445 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2022-07-21 08:47:33,445 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 184 flow [2022-07-21 08:47:33,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-07-21 08:47:33,445 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:33,446 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:47:33,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 08:47:33,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:33,664 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:47:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash -464838401, now seen corresponding path program 1 times [2022-07-21 08:47:33,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:33,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234806899] [2022-07-21 08:47:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:33,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:47:33,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:33,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234806899] [2022-07-21 08:47:33,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234806899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:47:33,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896610056] [2022-07-21 08:47:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:33,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:33,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:33,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:47:33,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 08:47:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:33,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:47:33,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:47:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:47:33,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:47:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 08:47:34,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896610056] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:47:34,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:47:34,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:47:34,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248130037] [2022-07-21 08:47:34,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:47:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:47:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:47:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:47:34,024 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-07-21 08:47:34,025 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 184 flow. Second operand has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 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) [2022-07-21 08:47:34,025 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:34,025 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-07-21 08:47:34,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:34,123 INFO L129 PetriNetUnfolder]: 2/107 cut-off events. [2022-07-21 08:47:34,123 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:47:34,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 107 events. 2/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2022-07-21 08:47:34,127 INFO L132 encePairwiseOnDemand]: 91/97 looper letters, 10 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2022-07-21 08:47:34,127 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 90 transitions, 240 flow [2022-07-21 08:47:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:47:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:47:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 732 transitions. [2022-07-21 08:47:34,130 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8384879725085911 [2022-07-21 08:47:34,130 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 732 transitions. [2022-07-21 08:47:34,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 732 transitions. [2022-07-21 08:47:34,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:34,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 732 transitions. [2022-07-21 08:47:34,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.33333333333333) internal successors, (732), 9 states have internal predecessors, (732), 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) [2022-07-21 08:47:34,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 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) [2022-07-21 08:47:34,143 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 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) [2022-07-21 08:47:34,143 INFO L186 Difference]: Start difference. First operand has 85 places, 82 transitions, 184 flow. Second operand 9 states and 732 transitions. [2022-07-21 08:47:34,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 90 transitions, 240 flow [2022-07-21 08:47:34,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 90 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:47:34,148 INFO L242 Difference]: Finished difference. Result has 95 places, 88 transitions, 232 flow [2022-07-21 08:47:34,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=232, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2022-07-21 08:47:34,150 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 11 predicate places. [2022-07-21 08:47:34,150 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 232 flow [2022-07-21 08:47:34,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.0) internal successors, (810), 10 states have internal predecessors, (810), 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) [2022-07-21 08:47:34,151 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:34,151 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:47:34,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 08:47:34,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-21 08:47:34,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:47:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1283919323, now seen corresponding path program 2 times [2022-07-21 08:47:34,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:34,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555327405] [2022-07-21 08:47:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:34,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 08:47:34,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:34,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555327405] [2022-07-21 08:47:34,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555327405] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:47:34,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800909632] [2022-07-21 08:47:34,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 08:47:34,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:34,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:34,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:47:34,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 08:47:34,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 08:47:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:47:34,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 08:47:34,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:47:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 08:47:34,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:47:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 08:47:34,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800909632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:47:34,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:47:34,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 08:47:34,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105385486] [2022-07-21 08:47:34,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:47:34,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 08:47:34,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 08:47:34,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 08:47:34,686 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 97 [2022-07-21 08:47:34,687 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 81.9) internal successors, (819), 10 states have internal predecessors, (819), 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) [2022-07-21 08:47:34,687 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:34,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 97 [2022-07-21 08:47:34,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:34,782 INFO L129 PetriNetUnfolder]: 2/120 cut-off events. [2022-07-21 08:47:34,782 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-07-21 08:47:34,784 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 120 events. 2/120 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 2/121 useless extension candidates. Maximal degree in co-relation 135. Up to 7 conditions per place. [2022-07-21 08:47:34,786 INFO L132 encePairwiseOnDemand]: 91/97 looper letters, 9 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2022-07-21 08:47:34,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 96 transitions, 286 flow [2022-07-21 08:47:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 08:47:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 08:47:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 740 transitions. [2022-07-21 08:47:34,789 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.847651775486827 [2022-07-21 08:47:34,789 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 740 transitions. [2022-07-21 08:47:34,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 740 transitions. [2022-07-21 08:47:34,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:34,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 740 transitions. [2022-07-21 08:47:34,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 82.22222222222223) internal successors, (740), 9 states have internal predecessors, (740), 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) [2022-07-21 08:47:34,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 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) [2022-07-21 08:47:34,796 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 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) [2022-07-21 08:47:34,796 INFO L186 Difference]: Start difference. First operand has 95 places, 88 transitions, 232 flow. Second operand 9 states and 740 transitions. [2022-07-21 08:47:34,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 96 transitions, 286 flow [2022-07-21 08:47:34,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 96 transitions, 280 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-21 08:47:34,803 INFO L242 Difference]: Finished difference. Result has 105 places, 94 transitions, 276 flow [2022-07-21 08:47:34,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=276, PETRI_PLACES=105, PETRI_TRANSITIONS=94} [2022-07-21 08:47:34,804 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2022-07-21 08:47:34,805 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 94 transitions, 276 flow [2022-07-21 08:47:34,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 81.9) internal successors, (819), 10 states have internal predecessors, (819), 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) [2022-07-21 08:47:34,805 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:34,806 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:47:34,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 08:47:35,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:35,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:47:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1447238555, now seen corresponding path program 3 times [2022-07-21 08:47:35,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:35,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214817488] [2022-07-21 08:47:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:35,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 08:47:35,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:35,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214817488] [2022-07-21 08:47:35,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214817488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:47:35,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448259843] [2022-07-21 08:47:35,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 08:47:35,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:35,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:35,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:47:35,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 08:47:35,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 08:47:35,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:47:35,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:47:35,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:47:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 08:47:35,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:47:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 08:47:35,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448259843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:47:35,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:47:35,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-21 08:47:35,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355301813] [2022-07-21 08:47:35,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:47:35,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:47:35,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:47:35,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:47:35,453 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-07-21 08:47:35,454 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 94 transitions, 276 flow. Second operand has 18 states, 18 states have (on average 81.0) internal successors, (1458), 18 states have internal predecessors, (1458), 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) [2022-07-21 08:47:35,454 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:35,454 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-07-21 08:47:35,455 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:35,657 INFO L129 PetriNetUnfolder]: 2/152 cut-off events. [2022-07-21 08:47:35,657 INFO L130 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-07-21 08:47:35,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 152 events. 2/152 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 221. Up to 11 conditions per place. [2022-07-21 08:47:35,660 INFO L132 encePairwiseOnDemand]: 91/97 looper letters, 14 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2022-07-21 08:47:35,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 112 transitions, 434 flow [2022-07-21 08:47:35,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 08:47:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-07-21 08:47:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1698 transitions. [2022-07-21 08:47:35,665 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.833578792341679 [2022-07-21 08:47:35,665 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1698 transitions. [2022-07-21 08:47:35,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1698 transitions. [2022-07-21 08:47:35,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:35,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1698 transitions. [2022-07-21 08:47:35,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 80.85714285714286) internal successors, (1698), 21 states have internal predecessors, (1698), 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) [2022-07-21 08:47:35,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 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) [2022-07-21 08:47:35,676 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 97.0) internal successors, (2134), 22 states have internal predecessors, (2134), 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) [2022-07-21 08:47:35,677 INFO L186 Difference]: Start difference. First operand has 105 places, 94 transitions, 276 flow. Second operand 21 states and 1698 transitions. [2022-07-21 08:47:35,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 112 transitions, 434 flow [2022-07-21 08:47:35,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 112 transitions, 428 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-07-21 08:47:35,685 INFO L242 Difference]: Finished difference. Result has 129 places, 107 transitions, 400 flow [2022-07-21 08:47:35,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=400, PETRI_PLACES=129, PETRI_TRANSITIONS=107} [2022-07-21 08:47:35,688 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 45 predicate places. [2022-07-21 08:47:35,688 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 107 transitions, 400 flow [2022-07-21 08:47:35,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.0) internal successors, (1458), 18 states have internal predecessors, (1458), 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) [2022-07-21 08:47:35,689 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:35,689 INFO L200 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:47:35,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 08:47:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:35,908 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:47:35,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash -692690511, now seen corresponding path program 4 times [2022-07-21 08:47:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:35,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114632239] [2022-07-21 08:47:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 08:47:36,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:36,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114632239] [2022-07-21 08:47:36,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114632239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:47:36,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183902340] [2022-07-21 08:47:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 08:47:36,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:36,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:36,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:47:36,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 08:47:36,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 08:47:36,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:47:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:47:36,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:47:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 08:47:36,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:47:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 08:47:36,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183902340] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:47:36,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:47:36,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-07-21 08:47:36,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440068653] [2022-07-21 08:47:36,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:47:36,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 08:47:36,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:36,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 08:47:36,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 08:47:36,717 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 97 [2022-07-21 08:47:36,719 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 107 transitions, 400 flow. Second operand has 34 states, 34 states have (on average 81.0) internal successors, (2754), 34 states have internal predecessors, (2754), 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) [2022-07-21 08:47:36,720 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:36,720 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 97 [2022-07-21 08:47:36,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:37,276 INFO L129 PetriNetUnfolder]: 2/216 cut-off events. [2022-07-21 08:47:37,276 INFO L130 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2022-07-21 08:47:37,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 216 events. 2/216 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 8/223 useless extension candidates. Maximal degree in co-relation 448. Up to 27 conditions per place. [2022-07-21 08:47:37,280 INFO L132 encePairwiseOnDemand]: 91/97 looper letters, 22 selfloop transitions, 45 changer transitions 0/144 dead transitions. [2022-07-21 08:47:37,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 144 transitions, 822 flow [2022-07-21 08:47:37,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 08:47:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-07-21 08:47:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3630 transitions. [2022-07-21 08:47:37,290 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8316151202749141 [2022-07-21 08:47:37,290 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3630 transitions. [2022-07-21 08:47:37,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3630 transitions. [2022-07-21 08:47:37,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:37,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3630 transitions. [2022-07-21 08:47:37,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 80.66666666666667) internal successors, (3630), 45 states have internal predecessors, (3630), 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) [2022-07-21 08:47:37,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 97.0) internal successors, (4462), 46 states have internal predecessors, (4462), 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) [2022-07-21 08:47:37,311 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 97.0) internal successors, (4462), 46 states have internal predecessors, (4462), 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) [2022-07-21 08:47:37,311 INFO L186 Difference]: Start difference. First operand has 129 places, 107 transitions, 400 flow. Second operand 45 states and 3630 transitions. [2022-07-21 08:47:37,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 144 transitions, 822 flow [2022-07-21 08:47:37,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 144 transitions, 782 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-07-21 08:47:37,321 INFO L242 Difference]: Finished difference. Result has 176 places, 132 transitions, 678 flow [2022-07-21 08:47:37,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=678, PETRI_PLACES=176, PETRI_TRANSITIONS=132} [2022-07-21 08:47:37,323 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 92 predicate places. [2022-07-21 08:47:37,324 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 132 transitions, 678 flow [2022-07-21 08:47:37,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 81.0) internal successors, (2754), 34 states have internal predecessors, (2754), 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) [2022-07-21 08:47:37,325 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:37,325 INFO L200 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:47:37,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 08:47:37,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:37,551 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:47:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:37,552 INFO L85 PathProgramCache]: Analyzing trace with hash 166775881, now seen corresponding path program 5 times [2022-07-21 08:47:37,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:37,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564292664] [2022-07-21 08:47:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:37,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 08:47:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:38,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564292664] [2022-07-21 08:47:38,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564292664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:47:38,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827520015] [2022-07-21 08:47:38,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 08:47:38,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:47:38,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:38,088 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:47:38,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 08:47:38,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-21 08:47:38,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:47:38,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 08:47:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:47:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-07-21 08:47:38,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:47:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-07-21 08:47:38,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827520015] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:47:38,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:47:38,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 9, 9] total 47 [2022-07-21 08:47:38,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935735022] [2022-07-21 08:47:38,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:47:38,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-21 08:47:38,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-21 08:47:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 08:47:38,649 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 97 [2022-07-21 08:47:38,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 132 transitions, 678 flow. Second operand has 47 states, 47 states have (on average 74.29787234042553) internal successors, (3492), 47 states have internal predecessors, (3492), 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) [2022-07-21 08:47:38,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:38,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 97 [2022-07-21 08:47:38,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:48:31,455 INFO L129 PetriNetUnfolder]: 2209/7059 cut-off events. [2022-07-21 08:48:31,455 INFO L130 PetriNetUnfolder]: For 20228/20228 co-relation queries the response was YES. [2022-07-21 08:48:31,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22934 conditions, 7059 events. 2209/7059 cut-off events. For 20228/20228 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 51024 event pairs, 20 based on Foata normal form. 308/7363 useless extension candidates. Maximal degree in co-relation 18139. Up to 928 conditions per place. [2022-07-21 08:48:31,538 INFO L132 encePairwiseOnDemand]: 86/97 looper letters, 961 selfloop transitions, 1927 changer transitions 0/2951 dead transitions. [2022-07-21 08:48:31,538 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1116 places, 2951 transitions, 26324 flow [2022-07-21 08:48:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 941 states. [2022-07-21 08:48:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 941 states. [2022-07-21 08:48:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 70848 transitions. [2022-07-21 08:48:31,624 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.776186772133177 [2022-07-21 08:48:31,625 INFO L72 ComplementDD]: Start complementDD. Operand 941 states and 70848 transitions. [2022-07-21 08:48:31,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 941 states and 70848 transitions. [2022-07-21 08:48:31,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:48:31,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 941 states and 70848 transitions. [2022-07-21 08:48:31,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 942 states, 941 states have (on average 75.29011689691818) internal successors, (70848), 941 states have internal predecessors, (70848), 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) [2022-07-21 08:48:31,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 942 states, 942 states have (on average 97.0) internal successors, (91374), 942 states have internal predecessors, (91374), 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) [2022-07-21 08:48:31,991 INFO L81 ComplementDD]: Finished complementDD. Result has 942 states, 942 states have (on average 97.0) internal successors, (91374), 942 states have internal predecessors, (91374), 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) [2022-07-21 08:48:31,992 INFO L186 Difference]: Start difference. First operand has 176 places, 132 transitions, 678 flow. Second operand 941 states and 70848 transitions. [2022-07-21 08:48:31,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1116 places, 2951 transitions, 26324 flow [2022-07-21 08:48:32,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1098 places, 2951 transitions, 25164 flow, removed 220 selfloop flow, removed 18 redundant places. [2022-07-21 08:48:32,108 INFO L242 Difference]: Finished difference. Result has 1378 places, 2119 transitions, 18814 flow [2022-07-21 08:48:32,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=941, PETRI_FLOW=18814, PETRI_PLACES=1378, PETRI_TRANSITIONS=2119} [2022-07-21 08:48:32,110 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 1294 predicate places. [2022-07-21 08:48:32,110 INFO L495 AbstractCegarLoop]: Abstraction has has 1378 places, 2119 transitions, 18814 flow [2022-07-21 08:48:32,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 74.29787234042553) internal successors, (3492), 47 states have internal predecessors, (3492), 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) [2022-07-21 08:48:32,113 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:48:32,113 INFO L200 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:48:32,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 08:48:32,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:48:32,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-21 08:48:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:48:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash 396055486, now seen corresponding path program 6 times [2022-07-21 08:48:32,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:48:32,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233931086] [2022-07-21 08:48:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:48:32,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:48:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:48:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-21 08:48:32,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:48:32,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233931086] [2022-07-21 08:48:32,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233931086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 08:48:32,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368151806] [2022-07-21 08:48:32,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 08:48:32,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 08:48:32,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:48:32,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 08:48:32,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 08:48:33,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-21 08:48:33,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 08:48:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 08:48:33,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 08:48:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 31 proven. 238 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-07-21 08:48:33,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 08:48:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 31 proven. 238 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-07-21 08:48:34,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368151806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 08:48:34,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 08:48:34,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17, 17] total 65 [2022-07-21 08:48:34,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45677812] [2022-07-21 08:48:34,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 08:48:34,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-21 08:48:34,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:48:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-21 08:48:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=3566, Unknown=0, NotChecked=0, Total=4160 [2022-07-21 08:48:34,141 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 97 [2022-07-21 08:48:34,144 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1378 places, 2119 transitions, 18814 flow. Second operand has 65 states, 65 states have (on average 74.23076923076923) internal successors, (4825), 65 states have internal predecessors, (4825), 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) [2022-07-21 08:48:34,144 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:48:34,145 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 97 [2022-07-21 08:48:34,145 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand