./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/weaver/popl20-bad-counter-queue2.wvr.c -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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:09:41,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:09:41,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:09:41,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:09:41,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:09:41,802 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:09:41,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:09:41,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:09:41,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:09:41,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:09:41,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:09:41,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:09:41,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:09:41,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:09:41,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:09:41,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:09:41,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:09:41,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:09:41,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:09:41,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:09:41,833 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:09:41,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:09:41,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:09:41,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:09:41,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:09:41,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:09:41,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:09:41,841 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:09:41,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:09:41,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:09:41,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:09:41,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:09:41,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:09:41,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:09:41,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:09:41,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:09:41,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:09:41,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:09:41,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:09:41,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:09:41,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:09:41,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:09:41,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:09:41,875 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:09:41,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:09:41,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:09:41,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:09:41,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:09:41,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:09:41,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:09:41,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:09:41,879 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:09:41,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:09:41,880 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:09:41,880 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:09:41,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:09:41,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:09:41,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:09:41,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:09:41,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:09:41,882 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:09:41,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:09:41,883 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:09:41,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:09:41,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:09:41,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:09:41,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:09:41,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:09:41,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:09:41,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:09:41,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:09:41,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:09:41,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:09:41,885 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:09:41,885 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:09:41,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:09:41,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-07-13 22:09:42,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:09:42,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:09:42,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:09:42,147 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:09:42,148 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:09:42,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-07-13 22:09:42,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe83b366d/417cf1c8c9814fa1834255d28ee40192/FLAGb5466a509 [2022-07-13 22:09:42,667 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:09:42,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-07-13 22:09:42,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe83b366d/417cf1c8c9814fa1834255d28ee40192/FLAGb5466a509 [2022-07-13 22:09:42,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe83b366d/417cf1c8c9814fa1834255d28ee40192 [2022-07-13 22:09:42,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:09:42,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:09:42,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:09:42,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:09:42,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:09:42,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:42,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7926a9b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42, skipping insertion in model container [2022-07-13 22:09:42,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:42,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:09:42,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:09:42,903 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/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-07-13 22:09:42,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:09:42,932 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:09:42,968 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/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-07-13 22:09:42,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:09:42,986 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:09:42,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42 WrapperNode [2022-07-13 22:09:42,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:09:42,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:09:42,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:09:42,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:09:42,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,036 INFO L137 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 138 [2022-07-13 22:09:43,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:09:43,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:09:43,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:09:43,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:09:43,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:09:43,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:09:43,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:09:43,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:09:43,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (1/1) ... [2022-07-13 22:09:43,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:09:43,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:43,116 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) [2022-07-13 22:09:43,131 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 [2022-07-13 22:09:43,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:09:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:09:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:09:43,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:09:43,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:09:43,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:09:43,161 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:09:43,161 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:09:43,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:09:43,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-13 22:09:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-13 22:09:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:09:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:09:43,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:09:43,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:09:43,164 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:09:43,283 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:09:43,285 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:09:43,529 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:09:43,644 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:09:43,645 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:09:43,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:43 BoogieIcfgContainer [2022-07-13 22:09:43,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:09:43,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:09:43,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:09:43,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:09:43,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:09:42" (1/3) ... [2022-07-13 22:09:43,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dcad279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:43, skipping insertion in model container [2022-07-13 22:09:43,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:42" (2/3) ... [2022-07-13 22:09:43,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dcad279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:43, skipping insertion in model container [2022-07-13 22:09:43,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:43" (3/3) ... [2022-07-13 22:09:43,658 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-07-13 22:09:43,663 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:09:43,671 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:09:43,672 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:09:43,672 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:09:43,735 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:09:43,766 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 250 flow [2022-07-13 22:09:43,821 INFO L129 PetriNetUnfolder]: 9/115 cut-off events. [2022-07-13 22:09:43,821 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:09:43,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2022-07-13 22:09:43,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 250 flow [2022-07-13 22:09:43,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2022-07-13 22:09:43,841 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:09:43,847 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@59cb24ab, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@655dca8d [2022-07-13 22:09:43,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:09:43,874 INFO L129 PetriNetUnfolder]: 9/105 cut-off events. [2022-07-13 22:09:43,876 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:09:43,876 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:43,877 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, 1, 1, 1] [2022-07-13 22:09:43,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:43,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1997616241, now seen corresponding path program 1 times [2022-07-13 22:09:43,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:43,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594740453] [2022-07-13 22:09:43,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:44,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:44,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594740453] [2022-07-13 22:09:44,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594740453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:44,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:44,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:09:44,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515858607] [2022-07-13 22:09:44,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:44,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:09:44,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:09:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:09:44,164 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 117 [2022-07-13 22:09:44,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 224 flow. Second operand has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:44,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 117 [2022-07-13 22:09:44,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:44,225 INFO L129 PetriNetUnfolder]: 12/133 cut-off events. [2022-07-13 22:09:44,227 INFO L130 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-07-13 22:09:44,231 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 133 events. 12/133 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 170 event pairs, 3 based on Foata normal form. 13/135 useless extension candidates. Maximal degree in co-relation 78. Up to 19 conditions per place. [2022-07-13 22:09:44,232 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 6 selfloop transitions, 0 changer transitions 3/100 dead transitions. [2022-07-13 22:09:44,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 224 flow [2022-07-13 22:09:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:09:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:09:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2022-07-13 22:09:44,244 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9401709401709402 [2022-07-13 22:09:44,244 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2022-07-13 22:09:44,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2022-07-13 22:09:44,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:44,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2022-07-13 22:09:44,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,266 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,268 INFO L186 Difference]: Start difference. First operand has 104 places, 106 transitions, 224 flow. Second operand 2 states and 220 transitions. [2022-07-13 22:09:44,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 224 flow [2022-07-13 22:09:44,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:09:44,283 INFO L242 Difference]: Finished difference. Result has 101 places, 97 transitions, 198 flow [2022-07-13 22:09:44,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2022-07-13 22:09:44,290 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2022-07-13 22:09:44,290 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 198 flow [2022-07-13 22:09:44,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,291 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:44,291 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, 1, 1, 1] [2022-07-13 22:09:44,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:09:44,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:44,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:44,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1204015377, now seen corresponding path program 1 times [2022-07-13 22:09:44,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:44,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969021208] [2022-07-13 22:09:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:44,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:44,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:44,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969021208] [2022-07-13 22:09:44,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969021208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:44,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:44,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 22:09:44,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192018853] [2022-07-13 22:09:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:44,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 22:09:44,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 22:09:44,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 22:09:44,551 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 117 [2022-07-13 22:09:44,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:44,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 117 [2022-07-13 22:09:44,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:44,644 INFO L129 PetriNetUnfolder]: 13/150 cut-off events. [2022-07-13 22:09:44,645 INFO L130 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2022-07-13 22:09:44,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 150 events. 13/150 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 252 event pairs, 0 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 192. Up to 24 conditions per place. [2022-07-13 22:09:44,646 INFO L132 encePairwiseOnDemand]: 111/117 looper letters, 20 selfloop transitions, 3 changer transitions 4/105 dead transitions. [2022-07-13 22:09:44,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 105 transitions, 271 flow [2022-07-13 22:09:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:09:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:09:44,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2022-07-13 22:09:44,650 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-07-13 22:09:44,650 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2022-07-13 22:09:44,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2022-07-13 22:09:44,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:44,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2022-07-13 22:09:44,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,655 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,655 INFO L186 Difference]: Start difference. First operand has 101 places, 97 transitions, 198 flow. Second operand 5 states and 468 transitions. [2022-07-13 22:09:44,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 105 transitions, 271 flow [2022-07-13 22:09:44,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:09:44,665 INFO L242 Difference]: Finished difference. Result has 105 places, 99 transitions, 221 flow [2022-07-13 22:09:44,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2022-07-13 22:09:44,666 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2022-07-13 22:09:44,666 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 221 flow [2022-07-13 22:09:44,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,667 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:44,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:44,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:09:44,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1430434687, now seen corresponding path program 1 times [2022-07-13 22:09:44,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:44,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496162699] [2022-07-13 22:09:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:44,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:44,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:44,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496162699] [2022-07-13 22:09:44,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496162699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:44,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:44,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:09:44,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411995127] [2022-07-13 22:09:44,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:44,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:09:44,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:44,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:09:44,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:09:44,863 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-13 22:09:44,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:44,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:44,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-13 22:09:44,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:45,039 INFO L129 PetriNetUnfolder]: 83/368 cut-off events. [2022-07-13 22:09:45,040 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-07-13 22:09:45,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 368 events. 83/368 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1527 event pairs, 34 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 615. Up to 125 conditions per place. [2022-07-13 22:09:45,043 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 41 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2022-07-13 22:09:45,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 374 flow [2022-07-13 22:09:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:09:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:09:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2022-07-13 22:09:45,047 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7585470085470085 [2022-07-13 22:09:45,047 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2022-07-13 22:09:45,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2022-07-13 22:09:45,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:45,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2022-07-13 22:09:45,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,054 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,055 INFO L186 Difference]: Start difference. First operand has 105 places, 99 transitions, 221 flow. Second operand 8 states and 710 transitions. [2022-07-13 22:09:45,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 374 flow [2022-07-13 22:09:45,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 119 transitions, 365 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 22:09:45,059 INFO L242 Difference]: Finished difference. Result has 110 places, 102 transitions, 250 flow [2022-07-13 22:09:45,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2022-07-13 22:09:45,060 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 6 predicate places. [2022-07-13 22:09:45,060 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 250 flow [2022-07-13 22:09:45,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:45,061 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:45,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:09:45,061 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:45,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:45,062 INFO L85 PathProgramCache]: Analyzing trace with hash -852119249, now seen corresponding path program 1 times [2022-07-13 22:09:45,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:45,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148668883] [2022-07-13 22:09:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:45,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:45,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:45,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148668883] [2022-07-13 22:09:45,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148668883] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:09:45,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:09:45,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 22:09:45,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549391915] [2022-07-13 22:09:45,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:45,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:09:45,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:45,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:09:45,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 22:09:45,228 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-13 22:09:45,229 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,229 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:45,229 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-13 22:09:45,229 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:45,409 INFO L129 PetriNetUnfolder]: 67/286 cut-off events. [2022-07-13 22:09:45,409 INFO L130 PetriNetUnfolder]: For 51/54 co-relation queries the response was YES. [2022-07-13 22:09:45,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 286 events. 67/286 cut-off events. For 51/54 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1018 event pairs, 36 based on Foata normal form. 3/268 useless extension candidates. Maximal degree in co-relation 502. Up to 124 conditions per place. [2022-07-13 22:09:45,413 INFO L132 encePairwiseOnDemand]: 108/117 looper letters, 27 selfloop transitions, 6 changer transitions 11/114 dead transitions. [2022-07-13 22:09:45,413 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 365 flow [2022-07-13 22:09:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:09:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:09:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 706 transitions. [2022-07-13 22:09:45,416 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7542735042735043 [2022-07-13 22:09:45,416 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 706 transitions. [2022-07-13 22:09:45,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 706 transitions. [2022-07-13 22:09:45,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:45,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 706 transitions. [2022-07-13 22:09:45,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,427 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,427 INFO L186 Difference]: Start difference. First operand has 110 places, 102 transitions, 250 flow. Second operand 8 states and 706 transitions. [2022-07-13 22:09:45,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 365 flow [2022-07-13 22:09:45,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 114 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:09:45,434 INFO L242 Difference]: Finished difference. Result has 115 places, 100 transitions, 244 flow [2022-07-13 22:09:45,435 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2022-07-13 22:09:45,436 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-07-13 22:09:45,440 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 244 flow [2022-07-13 22:09:45,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:45,441 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:45,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:45,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 22:09:45,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1474470436, now seen corresponding path program 1 times [2022-07-13 22:09:45,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:45,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802659564] [2022-07-13 22:09:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:45,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:45,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:45,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802659564] [2022-07-13 22:09:45,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802659564] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:45,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717718473] [2022-07-13 22:09:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:45,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:45,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:45,599 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) [2022-07-13 22:09:45,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:09:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:09:45,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:45,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:46,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717718473] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:46,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:09:46,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-13 22:09:46,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118887326] [2022-07-13 22:09:46,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:46,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:09:46,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:09:46,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:09:46,035 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-13 22:09:46,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:46,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-13 22:09:46,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:46,155 INFO L129 PetriNetUnfolder]: 58/226 cut-off events. [2022-07-13 22:09:46,155 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-07-13 22:09:46,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 226 events. 58/226 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 641 event pairs, 13 based on Foata normal form. 8/229 useless extension candidates. Maximal degree in co-relation 432. Up to 65 conditions per place. [2022-07-13 22:09:46,157 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 30 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2022-07-13 22:09:46,158 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 107 transitions, 341 flow [2022-07-13 22:09:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:09:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:09:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-07-13 22:09:46,160 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2022-07-13 22:09:46,160 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-07-13 22:09:46,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-07-13 22:09:46,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:46,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-07-13 22:09:46,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,165 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,165 INFO L186 Difference]: Start difference. First operand has 115 places, 100 transitions, 244 flow. Second operand 7 states and 615 transitions. [2022-07-13 22:09:46,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 107 transitions, 341 flow [2022-07-13 22:09:46,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 107 transitions, 315 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-07-13 22:09:46,172 INFO L242 Difference]: Finished difference. Result has 111 places, 102 transitions, 255 flow [2022-07-13 22:09:46,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2022-07-13 22:09:46,176 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 7 predicate places. [2022-07-13 22:09:46,176 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 255 flow [2022-07-13 22:09:46,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,176 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:46,177 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:46,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:09:46,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:46,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:46,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1354192604, now seen corresponding path program 1 times [2022-07-13 22:09:46,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:46,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545905762] [2022-07-13 22:09:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:46,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:46,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545905762] [2022-07-13 22:09:46,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545905762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:46,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329710235] [2022-07-13 22:09:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:46,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:46,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:46,528 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) [2022-07-13 22:09:46,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:09:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:09:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:46,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:46,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329710235] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:46,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:09:46,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-13 22:09:46,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322964338] [2022-07-13 22:09:46,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:09:46,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 22:09:46,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 22:09:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-13 22:09:46,855 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-07-13 22:09:46,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:46,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-07-13 22:09:46,857 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:46,953 INFO L129 PetriNetUnfolder]: 46/209 cut-off events. [2022-07-13 22:09:46,953 INFO L130 PetriNetUnfolder]: For 65/80 co-relation queries the response was YES. [2022-07-13 22:09:46,953 INFO L84 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 209 events. 46/209 cut-off events. For 65/80 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 523 event pairs, 9 based on Foata normal form. 15/211 useless extension candidates. Maximal degree in co-relation 397. Up to 54 conditions per place. [2022-07-13 22:09:46,956 INFO L132 encePairwiseOnDemand]: 109/117 looper letters, 32 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2022-07-13 22:09:46,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 360 flow [2022-07-13 22:09:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 22:09:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-13 22:09:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-07-13 22:09:46,958 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2022-07-13 22:09:46,960 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-07-13 22:09:46,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-07-13 22:09:46,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:46,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-07-13 22:09:46,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,964 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,965 INFO L186 Difference]: Start difference. First operand has 111 places, 102 transitions, 255 flow. Second operand 7 states and 615 transitions. [2022-07-13 22:09:46,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 360 flow [2022-07-13 22:09:46,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 109 transitions, 351 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:09:46,972 INFO L242 Difference]: Finished difference. Result has 115 places, 103 transitions, 274 flow [2022-07-13 22:09:46,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2022-07-13 22:09:46,974 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-07-13 22:09:46,975 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 274 flow [2022-07-13 22:09:46,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:46,975 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:46,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:47,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:09:47,191 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,SelfDestructingSolverStorable5 [2022-07-13 22:09:47,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 62640818, now seen corresponding path program 1 times [2022-07-13 22:09:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319763606] [2022-07-13 22:09:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:47,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:47,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319763606] [2022-07-13 22:09:47,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319763606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:47,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443562657] [2022-07-13 22:09:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:47,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:47,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:47,528 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) [2022-07-13 22:09:47,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:09:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-13 22:09:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:47,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:47,784 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:09:47,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:09:47,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-13 22:09:47,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:48,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:48,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 22:09:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:48,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:48,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 22:09:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:48,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443562657] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:09:48,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:09:48,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 9] total 30 [2022-07-13 22:09:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940415577] [2022-07-13 22:09:48,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:09:48,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 22:09:48,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 22:09:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-07-13 22:09:48,512 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2022-07-13 22:09:48,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 274 flow. Second operand has 30 states, 30 states have (on average 49.266666666666666) internal successors, (1478), 30 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:48,513 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:48,513 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2022-07-13 22:09:48,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:49,371 INFO L129 PetriNetUnfolder]: 325/771 cut-off events. [2022-07-13 22:09:49,371 INFO L130 PetriNetUnfolder]: For 507/507 co-relation queries the response was YES. [2022-07-13 22:09:49,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1870 conditions, 771 events. 325/771 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3846 event pairs, 99 based on Foata normal form. 1/761 useless extension candidates. Maximal degree in co-relation 1859. Up to 330 conditions per place. [2022-07-13 22:09:49,377 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 90 selfloop transitions, 29 changer transitions 4/162 dead transitions. [2022-07-13 22:09:49,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 162 transitions, 727 flow [2022-07-13 22:09:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 22:09:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-13 22:09:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1112 transitions. [2022-07-13 22:09:49,381 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.432012432012432 [2022-07-13 22:09:49,381 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1112 transitions. [2022-07-13 22:09:49,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1112 transitions. [2022-07-13 22:09:49,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:49,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1112 transitions. [2022-07-13 22:09:49,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 50.54545454545455) internal successors, (1112), 22 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:49,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:49,390 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:49,390 INFO L186 Difference]: Start difference. First operand has 115 places, 103 transitions, 274 flow. Second operand 22 states and 1112 transitions. [2022-07-13 22:09:49,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 162 transitions, 727 flow [2022-07-13 22:09:49,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 162 transitions, 709 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-13 22:09:49,395 INFO L242 Difference]: Finished difference. Result has 138 places, 118 transitions, 425 flow [2022-07-13 22:09:49,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=425, PETRI_PLACES=138, PETRI_TRANSITIONS=118} [2022-07-13 22:09:49,396 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 34 predicate places. [2022-07-13 22:09:49,396 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 118 transitions, 425 flow [2022-07-13 22:09:49,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 49.266666666666666) internal successors, (1478), 30 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:49,397 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:49,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:49,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:09:49,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:49,608 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:49,608 INFO L85 PathProgramCache]: Analyzing trace with hash -618781634, now seen corresponding path program 2 times [2022-07-13 22:09:49,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:49,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169650872] [2022-07-13 22:09:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:49,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:49,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:49,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169650872] [2022-07-13 22:09:49,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169650872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:49,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950085376] [2022-07-13 22:09:49,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:09:49,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:49,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:49,964 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) [2022-07-13 22:09:49,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:09:50,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:09:50,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:09:50,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-13 22:09:50,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:50,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:50,226 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:09:50,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:09:50,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-13 22:09:50,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:50,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-13 22:09:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:50,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:50,768 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int))) (= (+ c_~counter~0 (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-13 22:09:50,815 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-13 22:09:50,823 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int))) (= 0 (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~counter~0 (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-07-13 22:09:50,832 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) c_~A~0.base) c_~A~0.offset)) c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-13 22:09:50,861 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ c_~counter~0 (* (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) (- 1)) (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|))) 0)) is different from false [2022-07-13 22:09:50,871 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) c_~counter~0 (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))) 0)) is different from false [2022-07-13 22:09:50,890 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_146 (Array Int Int)) (v_ArrVal_145 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_145))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_146) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) 0)) is different from false [2022-07-13 22:09:50,922 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:09:50,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2022-07-13 22:09:50,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 140 [2022-07-13 22:09:50,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 132 [2022-07-13 22:09:50,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 124 [2022-07-13 22:09:51,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 22:09:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-13 22:09:51,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950085376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:09:51,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:09:51,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 38 [2022-07-13 22:09:51,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664920763] [2022-07-13 22:09:51,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:09:51,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 22:09:51,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:51,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 22:09:51,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=829, Unknown=7, NotChecked=448, Total=1406 [2022-07-13 22:09:51,495 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2022-07-13 22:09:51,497 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 118 transitions, 425 flow. Second operand has 38 states, 38 states have (on average 48.5) internal successors, (1843), 38 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:51,497 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:51,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2022-07-13 22:09:51,497 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:52,662 INFO L129 PetriNetUnfolder]: 471/1065 cut-off events. [2022-07-13 22:09:52,662 INFO L130 PetriNetUnfolder]: For 1207/1207 co-relation queries the response was YES. [2022-07-13 22:09:52,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2949 conditions, 1065 events. 471/1065 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6186 event pairs, 49 based on Foata normal form. 1/1055 useless extension candidates. Maximal degree in co-relation 2931. Up to 352 conditions per place. [2022-07-13 22:09:52,670 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 104 selfloop transitions, 49 changer transitions 4/196 dead transitions. [2022-07-13 22:09:52,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 196 transitions, 1052 flow [2022-07-13 22:09:52,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 22:09:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-13 22:09:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1313 transitions. [2022-07-13 22:09:52,675 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.43162393162393164 [2022-07-13 22:09:52,675 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1313 transitions. [2022-07-13 22:09:52,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1313 transitions. [2022-07-13 22:09:52,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:52,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1313 transitions. [2022-07-13 22:09:52,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 50.5) internal successors, (1313), 26 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:52,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:52,686 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:52,686 INFO L186 Difference]: Start difference. First operand has 138 places, 118 transitions, 425 flow. Second operand 26 states and 1313 transitions. [2022-07-13 22:09:52,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 196 transitions, 1052 flow [2022-07-13 22:09:52,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 976 flow, removed 20 selfloop flow, removed 14 redundant places. [2022-07-13 22:09:52,693 INFO L242 Difference]: Finished difference. Result has 151 places, 138 transitions, 619 flow [2022-07-13 22:09:52,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=619, PETRI_PLACES=151, PETRI_TRANSITIONS=138} [2022-07-13 22:09:52,695 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 47 predicate places. [2022-07-13 22:09:52,696 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 138 transitions, 619 flow [2022-07-13 22:09:52,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.5) internal successors, (1843), 38 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:52,697 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:52,697 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:52,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 22:09:52,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:52,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1246130652, now seen corresponding path program 3 times [2022-07-13 22:09:52,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:52,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100942407] [2022-07-13 22:09:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:52,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:53,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100942407] [2022-07-13 22:09:53,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100942407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:53,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693163530] [2022-07-13 22:09:53,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:09:53,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:53,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:53,314 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) [2022-07-13 22:09:53,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 22:09:53,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:09:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:09:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 22:09:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:53,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:53,723 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:09:53,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-13 22:09:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:53,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693163530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:09:53,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:09:53,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 8] total 26 [2022-07-13 22:09:53,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880485356] [2022-07-13 22:09:53,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:09:53,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 22:09:53,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:53,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 22:09:53,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-07-13 22:09:53,831 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-13 22:09:53,832 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 138 transitions, 619 flow. Second operand has 26 states, 26 states have (on average 52.38461538461539) internal successors, (1362), 26 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:53,832 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:53,832 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-13 22:09:53,832 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:54,547 INFO L129 PetriNetUnfolder]: 586/1308 cut-off events. [2022-07-13 22:09:54,549 INFO L130 PetriNetUnfolder]: For 1953/1953 co-relation queries the response was YES. [2022-07-13 22:09:54,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3807 conditions, 1308 events. 586/1308 cut-off events. For 1953/1953 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8300 event pairs, 146 based on Foata normal form. 1/1294 useless extension candidates. Maximal degree in co-relation 3787. Up to 784 conditions per place. [2022-07-13 22:09:54,560 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 112 selfloop transitions, 31 changer transitions 4/189 dead transitions. [2022-07-13 22:09:54,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 189 transitions, 1122 flow [2022-07-13 22:09:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 22:09:54,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-13 22:09:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1173 transitions. [2022-07-13 22:09:54,565 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4557109557109557 [2022-07-13 22:09:54,565 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1173 transitions. [2022-07-13 22:09:54,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1173 transitions. [2022-07-13 22:09:54,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:54,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1173 transitions. [2022-07-13 22:09:54,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 53.31818181818182) internal successors, (1173), 22 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:54,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:54,574 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:54,574 INFO L186 Difference]: Start difference. First operand has 151 places, 138 transitions, 619 flow. Second operand 22 states and 1173 transitions. [2022-07-13 22:09:54,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 189 transitions, 1122 flow [2022-07-13 22:09:54,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 189 transitions, 1028 flow, removed 32 selfloop flow, removed 14 redundant places. [2022-07-13 22:09:54,583 INFO L242 Difference]: Finished difference. Result has 161 places, 148 transitions, 693 flow [2022-07-13 22:09:54,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=693, PETRI_PLACES=161, PETRI_TRANSITIONS=148} [2022-07-13 22:09:54,584 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 57 predicate places. [2022-07-13 22:09:54,585 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 148 transitions, 693 flow [2022-07-13 22:09:54,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.38461538461539) internal successors, (1362), 26 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:54,585 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:54,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:54,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 22:09:54,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:54,808 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:54,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1270727132, now seen corresponding path program 4 times [2022-07-13 22:09:54,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:54,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888353953] [2022-07-13 22:09:54,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:54,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:55,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:55,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888353953] [2022-07-13 22:09:55,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888353953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530483734] [2022-07-13 22:09:55,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:09:55,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:55,070 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) [2022-07-13 22:09:55,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 22:09:55,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:09:55,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:09:55,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-13 22:09:55,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:55,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-13 22:09:55,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:55,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:55,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:55,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:55,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530483734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:09:55,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:09:55,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 27 [2022-07-13 22:09:55,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290310895] [2022-07-13 22:09:55,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:09:55,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 22:09:55,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 22:09:55,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-13 22:09:55,886 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-13 22:09:55,887 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 148 transitions, 693 flow. Second operand has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:55,887 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:55,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-13 22:09:55,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:56,776 INFO L129 PetriNetUnfolder]: 701/1574 cut-off events. [2022-07-13 22:09:56,776 INFO L130 PetriNetUnfolder]: For 2197/2197 co-relation queries the response was YES. [2022-07-13 22:09:56,781 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4512 conditions, 1574 events. 701/1574 cut-off events. For 2197/2197 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10496 event pairs, 231 based on Foata normal form. 1/1556 useless extension candidates. Maximal degree in co-relation 4489. Up to 806 conditions per place. [2022-07-13 22:09:56,788 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 115 selfloop transitions, 45 changer transitions 4/206 dead transitions. [2022-07-13 22:09:56,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 206 transitions, 1261 flow [2022-07-13 22:09:56,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 22:09:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-13 22:09:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1275 transitions. [2022-07-13 22:09:56,792 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45405982905982906 [2022-07-13 22:09:56,792 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1275 transitions. [2022-07-13 22:09:56,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1275 transitions. [2022-07-13 22:09:56,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:56,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1275 transitions. [2022-07-13 22:09:56,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 53.125) internal successors, (1275), 24 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:56,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:56,803 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 117.0) internal successors, (2925), 25 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:56,803 INFO L186 Difference]: Start difference. First operand has 161 places, 148 transitions, 693 flow. Second operand 24 states and 1275 transitions. [2022-07-13 22:09:56,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 206 transitions, 1261 flow [2022-07-13 22:09:56,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 206 transitions, 1195 flow, removed 11 selfloop flow, removed 16 redundant places. [2022-07-13 22:09:56,813 INFO L242 Difference]: Finished difference. Result has 169 places, 161 transitions, 840 flow [2022-07-13 22:09:56,814 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=840, PETRI_PLACES=169, PETRI_TRANSITIONS=161} [2022-07-13 22:09:56,814 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 65 predicate places. [2022-07-13 22:09:56,815 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 161 transitions, 840 flow [2022-07-13 22:09:56,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:56,815 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:56,815 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:56,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 22:09:57,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:57,029 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:57,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1059485982, now seen corresponding path program 5 times [2022-07-13 22:09:57,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:57,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004334222] [2022-07-13 22:09:57,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:57,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:57,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:57,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004334222] [2022-07-13 22:09:57,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004334222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:57,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529264334] [2022-07-13 22:09:57,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:09:57,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:57,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:57,256 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) [2022-07-13 22:09:57,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 22:09:57,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:09:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:09:57,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-13 22:09:57,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:57,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-13 22:09:57,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:57,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:09:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:09:57,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:57,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529264334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:09:57,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:09:57,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 28 [2022-07-13 22:09:57,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089055859] [2022-07-13 22:09:57,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:09:57,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 22:09:57,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:57,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 22:09:57,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-07-13 22:09:57,971 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-13 22:09:57,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 161 transitions, 840 flow. Second operand has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:57,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:57,972 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-13 22:09:57,973 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:09:58,901 INFO L129 PetriNetUnfolder]: 831/1856 cut-off events. [2022-07-13 22:09:58,901 INFO L130 PetriNetUnfolder]: For 3366/3366 co-relation queries the response was YES. [2022-07-13 22:09:58,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5581 conditions, 1856 events. 831/1856 cut-off events. For 3366/3366 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12821 event pairs, 244 based on Foata normal form. 1/1842 useless extension candidates. Maximal degree in co-relation 5556. Up to 832 conditions per place. [2022-07-13 22:09:58,916 INFO L132 encePairwiseOnDemand]: 96/117 looper letters, 120 selfloop transitions, 61 changer transitions 4/227 dead transitions. [2022-07-13 22:09:58,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 1523 flow [2022-07-13 22:09:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 22:09:58,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-13 22:09:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1380 transitions. [2022-07-13 22:09:58,920 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4536489151873767 [2022-07-13 22:09:58,920 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1380 transitions. [2022-07-13 22:09:58,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1380 transitions. [2022-07-13 22:09:58,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:09:58,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1380 transitions. [2022-07-13 22:09:58,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 53.07692307692308) internal successors, (1380), 26 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:58,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:58,927 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:58,928 INFO L186 Difference]: Start difference. First operand has 169 places, 161 transitions, 840 flow. Second operand 26 states and 1380 transitions. [2022-07-13 22:09:58,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 1523 flow [2022-07-13 22:09:58,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 227 transitions, 1396 flow, removed 45 selfloop flow, removed 16 redundant places. [2022-07-13 22:09:58,940 INFO L242 Difference]: Finished difference. Result has 179 places, 177 transitions, 1020 flow [2022-07-13 22:09:58,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1020, PETRI_PLACES=179, PETRI_TRANSITIONS=177} [2022-07-13 22:09:58,940 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 75 predicate places. [2022-07-13 22:09:58,941 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 177 transitions, 1020 flow [2022-07-13 22:09:58,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:58,941 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:09:58,942 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:09:58,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 22:09:59,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:59,159 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:09:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:09:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash -836879962, now seen corresponding path program 6 times [2022-07-13 22:09:59,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:09:59,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120824186] [2022-07-13 22:09:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:09:59,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:09:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:09:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:59,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:09:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120824186] [2022-07-13 22:09:59,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120824186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:09:59,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566812740] [2022-07-13 22:09:59,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:09:59,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:09:59,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:09:59,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:09:59,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 22:09:59,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:09:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:09:59,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 22:09:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:09:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:59,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:09:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:09:59,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566812740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:09:59,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:09:59,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-13 22:09:59,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822645206] [2022-07-13 22:09:59,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:09:59,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:09:59,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:09:59,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:09:59,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:09:59,659 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-07-13 22:09:59,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 177 transitions, 1020 flow. Second operand has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:09:59,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:09:59,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-07-13 22:09:59,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:00,140 INFO L129 PetriNetUnfolder]: 416/1418 cut-off events. [2022-07-13 22:10:00,141 INFO L130 PetriNetUnfolder]: For 2331/2349 co-relation queries the response was YES. [2022-07-13 22:10:00,147 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4124 conditions, 1418 events. 416/1418 cut-off events. For 2331/2349 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10225 event pairs, 113 based on Foata normal form. 41/1442 useless extension candidates. Maximal degree in co-relation 4097. Up to 383 conditions per place. [2022-07-13 22:10:00,153 INFO L132 encePairwiseOnDemand]: 101/117 looper letters, 174 selfloop transitions, 33 changer transitions 0/292 dead transitions. [2022-07-13 22:10:00,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 292 transitions, 2234 flow [2022-07-13 22:10:00,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:10:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:10:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1370 transitions. [2022-07-13 22:10:00,156 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7318376068376068 [2022-07-13 22:10:00,156 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1370 transitions. [2022-07-13 22:10:00,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1370 transitions. [2022-07-13 22:10:00,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:00,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1370 transitions. [2022-07-13 22:10:00,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.625) internal successors, (1370), 16 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:00,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:00,162 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:00,162 INFO L186 Difference]: Start difference. First operand has 179 places, 177 transitions, 1020 flow. Second operand 16 states and 1370 transitions. [2022-07-13 22:10:00,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 292 transitions, 2234 flow [2022-07-13 22:10:00,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 292 transitions, 2048 flow, removed 55 selfloop flow, removed 19 redundant places. [2022-07-13 22:10:00,174 INFO L242 Difference]: Finished difference. Result has 182 places, 203 transitions, 1270 flow [2022-07-13 22:10:00,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1270, PETRI_PLACES=182, PETRI_TRANSITIONS=203} [2022-07-13 22:10:00,174 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 78 predicate places. [2022-07-13 22:10:00,175 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 203 transitions, 1270 flow [2022-07-13 22:10:00,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:00,176 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:00,176 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:00,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:00,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 22:10:00,395 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash 447763680, now seen corresponding path program 7 times [2022-07-13 22:10:00,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:00,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442190023] [2022-07-13 22:10:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:00,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:00,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:00,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442190023] [2022-07-13 22:10:00,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442190023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:00,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686137330] [2022-07-13 22:10:00,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:10:00,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:00,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:00,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 22:10:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:00,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 22:10:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:00,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:00,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686137330] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:00,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:00,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-13 22:10:00,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347715890] [2022-07-13 22:10:00,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:00,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:10:00,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:00,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:10:00,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:10:00,864 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-07-13 22:10:00,871 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 203 transitions, 1270 flow. Second operand has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:00,871 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:00,871 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-07-13 22:10:00,872 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:01,356 INFO L129 PetriNetUnfolder]: 351/1201 cut-off events. [2022-07-13 22:10:01,356 INFO L130 PetriNetUnfolder]: For 2100/2138 co-relation queries the response was YES. [2022-07-13 22:10:01,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3682 conditions, 1201 events. 351/1201 cut-off events. For 2100/2138 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8505 event pairs, 135 based on Foata normal form. 62/1250 useless extension candidates. Maximal degree in co-relation 3650. Up to 453 conditions per place. [2022-07-13 22:10:01,365 INFO L132 encePairwiseOnDemand]: 101/117 looper letters, 101 selfloop transitions, 12 changer transitions 80/277 dead transitions. [2022-07-13 22:10:01,365 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 277 transitions, 2102 flow [2022-07-13 22:10:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 22:10:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-07-13 22:10:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1370 transitions. [2022-07-13 22:10:01,368 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7318376068376068 [2022-07-13 22:10:01,368 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1370 transitions. [2022-07-13 22:10:01,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1370 transitions. [2022-07-13 22:10:01,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:01,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1370 transitions. [2022-07-13 22:10:01,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.625) internal successors, (1370), 16 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,373 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 117.0) internal successors, (1989), 17 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,374 INFO L186 Difference]: Start difference. First operand has 182 places, 203 transitions, 1270 flow. Second operand 16 states and 1370 transitions. [2022-07-13 22:10:01,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 277 transitions, 2102 flow [2022-07-13 22:10:01,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 277 transitions, 2083 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-07-13 22:10:01,386 INFO L242 Difference]: Finished difference. Result has 198 places, 181 transitions, 1054 flow [2022-07-13 22:10:01,386 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1054, PETRI_PLACES=198, PETRI_TRANSITIONS=181} [2022-07-13 22:10:01,387 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 94 predicate places. [2022-07-13 22:10:01,387 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 181 transitions, 1054 flow [2022-07-13 22:10:01,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.75) internal successors, (2010), 24 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,388 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:01,389 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:01,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:01,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 22:10:01,603 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1322365107, now seen corresponding path program 8 times [2022-07-13 22:10:01,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:01,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641989419] [2022-07-13 22:10:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:01,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 22:10:01,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:01,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641989419] [2022-07-13 22:10:01,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641989419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:01,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281825982] [2022-07-13 22:10:01,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:10:01,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:01,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:01,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:01,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 22:10:01,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:10:01,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:01,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 22:10:01,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:10:01,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:10:01,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281825982] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:01,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:01,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-07-13 22:10:01,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140591655] [2022-07-13 22:10:01,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:01,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 22:10:01,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:01,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 22:10:01,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-07-13 22:10:01,946 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 117 [2022-07-13 22:10:01,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 181 transitions, 1054 flow. Second operand has 19 states, 19 states have (on average 80.78947368421052) internal successors, (1535), 19 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:01,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:01,947 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 117 [2022-07-13 22:10:01,947 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:02,937 INFO L129 PetriNetUnfolder]: 427/1012 cut-off events. [2022-07-13 22:10:02,937 INFO L130 PetriNetUnfolder]: For 2446/2446 co-relation queries the response was YES. [2022-07-13 22:10:02,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3843 conditions, 1012 events. 427/1012 cut-off events. For 2446/2446 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5229 event pairs, 10 based on Foata normal form. 49/1059 useless extension candidates. Maximal degree in co-relation 3806. Up to 165 conditions per place. [2022-07-13 22:10:02,951 INFO L132 encePairwiseOnDemand]: 99/117 looper letters, 173 selfloop transitions, 117 changer transitions 0/354 dead transitions. [2022-07-13 22:10:02,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 354 transitions, 2806 flow [2022-07-13 22:10:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-13 22:10:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-13 22:10:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3191 transitions. [2022-07-13 22:10:02,955 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6993206223975454 [2022-07-13 22:10:02,955 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3191 transitions. [2022-07-13 22:10:02,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3191 transitions. [2022-07-13 22:10:02,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:02,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3191 transitions. [2022-07-13 22:10:02,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 81.82051282051282) internal successors, (3191), 39 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:02,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:02,966 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:02,966 INFO L186 Difference]: Start difference. First operand has 198 places, 181 transitions, 1054 flow. Second operand 39 states and 3191 transitions. [2022-07-13 22:10:02,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 354 transitions, 2806 flow [2022-07-13 22:10:02,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 354 transitions, 2479 flow, removed 127 selfloop flow, removed 22 redundant places. [2022-07-13 22:10:02,983 INFO L242 Difference]: Finished difference. Result has 225 places, 251 transitions, 1785 flow [2022-07-13 22:10:02,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1785, PETRI_PLACES=225, PETRI_TRANSITIONS=251} [2022-07-13 22:10:02,984 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 121 predicate places. [2022-07-13 22:10:02,984 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 251 transitions, 1785 flow [2022-07-13 22:10:02,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.78947368421052) internal successors, (1535), 19 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:02,985 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:02,985 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:03,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:03,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 22:10:03,200 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash -823728965, now seen corresponding path program 9 times [2022-07-13 22:10:03,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:03,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623850020] [2022-07-13 22:10:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:03,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 22:10:03,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:03,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623850020] [2022-07-13 22:10:03,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623850020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:03,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046401389] [2022-07-13 22:10:03,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:10:03,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:03,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:03,308 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:03,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 22:10:03,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:10:03,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:03,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 22:10:03,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 22:10:03,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 22:10:03,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046401389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:03,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:03,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-13 22:10:03,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574127889] [2022-07-13 22:10:03,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:03,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 22:10:03,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 22:10:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-07-13 22:10:03,796 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-07-13 22:10:03,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 251 transitions, 1785 flow. Second operand has 24 states, 24 states have (on average 83.95833333333333) internal successors, (2015), 24 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:03,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:03,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-07-13 22:10:03,798 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:04,214 INFO L129 PetriNetUnfolder]: 310/826 cut-off events. [2022-07-13 22:10:04,215 INFO L130 PetriNetUnfolder]: For 4356/4380 co-relation queries the response was YES. [2022-07-13 22:10:04,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3723 conditions, 826 events. 310/826 cut-off events. For 4356/4380 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3903 event pairs, 39 based on Foata normal form. 35/850 useless extension candidates. Maximal degree in co-relation 3679. Up to 171 conditions per place. [2022-07-13 22:10:04,224 INFO L132 encePairwiseOnDemand]: 104/117 looper letters, 137 selfloop transitions, 57 changer transitions 0/312 dead transitions. [2022-07-13 22:10:04,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 312 transitions, 2625 flow [2022-07-13 22:10:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 22:10:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-13 22:10:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1280 transitions. [2022-07-13 22:10:04,230 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7293447293447294 [2022-07-13 22:10:04,230 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1280 transitions. [2022-07-13 22:10:04,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1280 transitions. [2022-07-13 22:10:04,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:04,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1280 transitions. [2022-07-13 22:10:04,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.33333333333333) internal successors, (1280), 15 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:04,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:04,236 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:04,236 INFO L186 Difference]: Start difference. First operand has 225 places, 251 transitions, 1785 flow. Second operand 15 states and 1280 transitions. [2022-07-13 22:10:04,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 312 transitions, 2625 flow [2022-07-13 22:10:04,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 312 transitions, 2590 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-07-13 22:10:04,261 INFO L242 Difference]: Finished difference. Result has 232 places, 259 transitions, 1984 flow [2022-07-13 22:10:04,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1984, PETRI_PLACES=232, PETRI_TRANSITIONS=259} [2022-07-13 22:10:04,262 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 128 predicate places. [2022-07-13 22:10:04,262 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 259 transitions, 1984 flow [2022-07-13 22:10:04,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 83.95833333333333) internal successors, (2015), 24 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:04,263 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:04,263 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:04,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-13 22:10:04,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 22:10:04,487 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:04,488 INFO L85 PathProgramCache]: Analyzing trace with hash -459984071, now seen corresponding path program 10 times [2022-07-13 22:10:04,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:04,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187150326] [2022-07-13 22:10:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:04,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:05,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:05,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187150326] [2022-07-13 22:10:05,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187150326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:05,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938894495] [2022-07-13 22:10:05,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:10:05,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:05,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:05,341 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:05,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 22:10:05,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:10:05,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-13 22:10:05,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:10:06,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:10:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:10:06,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:06,586 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_359 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_359) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)) (* (select .cse0 (+ c_~A~0.offset 4)) (- 1)) c_~counter~0)) 0)) is different from false [2022-07-13 22:10:06,609 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_359 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_359) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (select .cse0 (+ c_~A~0.offset 4)) (- 1)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) c_~counter~0)) 0)) is different from false [2022-07-13 22:10:06,641 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-13 22:10:06,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-13 22:10:06,657 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-13 22:10:06,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-13 22:10:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-07-13 22:10:07,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938894495] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:07,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:07,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 23, 21] total 61 [2022-07-13 22:10:07,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856818435] [2022-07-13 22:10:07,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:07,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-13 22:10:07,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-13 22:10:07,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3220, Unknown=2, NotChecked=230, Total=3660 [2022-07-13 22:10:07,377 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-13 22:10:07,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 259 transitions, 1984 flow. Second operand has 61 states, 61 states have (on average 43.90163934426229) internal successors, (2678), 61 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:07,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:07,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-13 22:10:07,379 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:11,573 INFO L129 PetriNetUnfolder]: 1948/3543 cut-off events. [2022-07-13 22:10:11,573 INFO L130 PetriNetUnfolder]: For 17319/17319 co-relation queries the response was YES. [2022-07-13 22:10:11,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16097 conditions, 3543 events. 1948/3543 cut-off events. For 17319/17319 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22845 event pairs, 145 based on Foata normal form. 1/3533 useless extension candidates. Maximal degree in co-relation 16054. Up to 2096 conditions per place. [2022-07-13 22:10:11,606 INFO L132 encePairwiseOnDemand]: 83/117 looper letters, 394 selfloop transitions, 144 changer transitions 4/577 dead transitions. [2022-07-13 22:10:11,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 577 transitions, 5247 flow [2022-07-13 22:10:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 22:10:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-13 22:10:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2573 transitions. [2022-07-13 22:10:11,610 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.39984459984459986 [2022-07-13 22:10:11,611 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2573 transitions. [2022-07-13 22:10:11,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2573 transitions. [2022-07-13 22:10:11,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:11,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2573 transitions. [2022-07-13 22:10:11,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 46.78181818181818) internal successors, (2573), 55 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:11,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:11,622 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:11,623 INFO L186 Difference]: Start difference. First operand has 232 places, 259 transitions, 1984 flow. Second operand 55 states and 2573 transitions. [2022-07-13 22:10:11,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 577 transitions, 5247 flow [2022-07-13 22:10:11,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 577 transitions, 5107 flow, removed 14 selfloop flow, removed 12 redundant places. [2022-07-13 22:10:11,698 INFO L242 Difference]: Finished difference. Result has 290 places, 371 transitions, 3266 flow [2022-07-13 22:10:11,698 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=3266, PETRI_PLACES=290, PETRI_TRANSITIONS=371} [2022-07-13 22:10:11,699 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 186 predicate places. [2022-07-13 22:10:11,699 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 371 transitions, 3266 flow [2022-07-13 22:10:11,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 43.90163934426229) internal successors, (2678), 61 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:11,700 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:11,700 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:11,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:11,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 22:10:11,901 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:11,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1705508623, now seen corresponding path program 11 times [2022-07-13 22:10:11,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:11,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268610299] [2022-07-13 22:10:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:12,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268610299] [2022-07-13 22:10:12,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268610299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:12,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191445749] [2022-07-13 22:10:12,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:10:12,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:12,518 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:12,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 22:10:12,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:10:12,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-13 22:10:12,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:10:13,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:13,466 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-13 22:10:13,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-13 22:10:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:10:13,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191445749] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:13,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:13,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 14] total 49 [2022-07-13 22:10:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30491665] [2022-07-13 22:10:13,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-13 22:10:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-13 22:10:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2181, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 22:10:13,590 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-13 22:10:13,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 371 transitions, 3266 flow. Second operand has 49 states, 49 states have (on average 51.326530612244895) internal successors, (2515), 49 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:13,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:13,592 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-13 22:10:13,592 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:16,357 INFO L129 PetriNetUnfolder]: 2510/4582 cut-off events. [2022-07-13 22:10:16,357 INFO L130 PetriNetUnfolder]: For 26191/26194 co-relation queries the response was YES. [2022-07-13 22:10:16,378 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23108 conditions, 4582 events. 2510/4582 cut-off events. For 26191/26194 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 31395 event pairs, 439 based on Foata normal form. 1/4552 useless extension candidates. Maximal degree in co-relation 23052. Up to 3125 conditions per place. [2022-07-13 22:10:16,399 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 450 selfloop transitions, 146 changer transitions 4/638 dead transitions. [2022-07-13 22:10:16,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 638 transitions, 6626 flow [2022-07-13 22:10:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 22:10:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-07-13 22:10:16,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2942 transitions. [2022-07-13 22:10:16,403 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45718725718725717 [2022-07-13 22:10:16,403 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2942 transitions. [2022-07-13 22:10:16,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2942 transitions. [2022-07-13 22:10:16,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:16,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2942 transitions. [2022-07-13 22:10:16,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 53.49090909090909) internal successors, (2942), 55 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:16,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:16,456 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 117.0) internal successors, (6552), 56 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:16,456 INFO L186 Difference]: Start difference. First operand has 290 places, 371 transitions, 3266 flow. Second operand 55 states and 2942 transitions. [2022-07-13 22:10:16,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 638 transitions, 6626 flow [2022-07-13 22:10:16,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 638 transitions, 6462 flow, removed 68 selfloop flow, removed 14 redundant places. [2022-07-13 22:10:16,607 INFO L242 Difference]: Finished difference. Result has 352 places, 451 transitions, 4562 flow [2022-07-13 22:10:16,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=3160, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=4562, PETRI_PLACES=352, PETRI_TRANSITIONS=451} [2022-07-13 22:10:16,608 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 248 predicate places. [2022-07-13 22:10:16,608 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 451 transitions, 4562 flow [2022-07-13 22:10:16,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 51.326530612244895) internal successors, (2515), 49 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:16,609 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:16,610 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:16,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 22:10:16,823 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash 922626737, now seen corresponding path program 12 times [2022-07-13 22:10:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:16,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287606398] [2022-07-13 22:10:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:16,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:17,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:17,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287606398] [2022-07-13 22:10:17,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287606398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:17,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932690865] [2022-07-13 22:10:17,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:10:17,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:17,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:17,440 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:17,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 22:10:17,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:10:17,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:17,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-13 22:10:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:18,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:10:18,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:10:18,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:10:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:18,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:18,921 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_419 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_419) c_~A~0.base)) (.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select .cse0 (+ c_~A~0.offset .cse1)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset .cse1 4)))) 0)) is different from false [2022-07-13 22:10:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:10:18,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932690865] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:18,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:18,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 15] total 59 [2022-07-13 22:10:18,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992328535] [2022-07-13 22:10:18,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:18,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-13 22:10:18,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-13 22:10:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3108, Unknown=1, NotChecked=112, Total=3422 [2022-07-13 22:10:18,981 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-13 22:10:18,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 451 transitions, 4562 flow. Second operand has 59 states, 59 states have (on average 44.03389830508475) internal successors, (2598), 59 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:18,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:18,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-13 22:10:18,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:22,949 INFO L129 PetriNetUnfolder]: 2927/5346 cut-off events. [2022-07-13 22:10:22,950 INFO L130 PetriNetUnfolder]: For 35445/35466 co-relation queries the response was YES. [2022-07-13 22:10:22,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28389 conditions, 5346 events. 2927/5346 cut-off events. For 35445/35466 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37839 event pairs, 518 based on Foata normal form. 15/5331 useless extension candidates. Maximal degree in co-relation 28310. Up to 3726 conditions per place. [2022-07-13 22:10:23,010 INFO L132 encePairwiseOnDemand]: 82/117 looper letters, 504 selfloop transitions, 208 changer transitions 4/751 dead transitions. [2022-07-13 22:10:23,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 751 transitions, 8468 flow [2022-07-13 22:10:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 22:10:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-07-13 22:10:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3244 transitions. [2022-07-13 22:10:23,015 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3960927960927961 [2022-07-13 22:10:23,015 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3244 transitions. [2022-07-13 22:10:23,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3244 transitions. [2022-07-13 22:10:23,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:23,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3244 transitions. [2022-07-13 22:10:23,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 46.34285714285714) internal successors, (3244), 70 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:23,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 117.0) internal successors, (8307), 71 states have internal predecessors, (8307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:23,029 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 117.0) internal successors, (8307), 71 states have internal predecessors, (8307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:23,029 INFO L186 Difference]: Start difference. First operand has 352 places, 451 transitions, 4562 flow. Second operand 70 states and 3244 transitions. [2022-07-13 22:10:23,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 751 transitions, 8468 flow [2022-07-13 22:10:23,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 751 transitions, 8331 flow, removed 33 selfloop flow, removed 26 redundant places. [2022-07-13 22:10:23,279 INFO L242 Difference]: Finished difference. Result has 408 places, 541 transitions, 6001 flow [2022-07-13 22:10:23,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=6001, PETRI_PLACES=408, PETRI_TRANSITIONS=541} [2022-07-13 22:10:23,281 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 304 predicate places. [2022-07-13 22:10:23,281 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 541 transitions, 6001 flow [2022-07-13 22:10:23,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 44.03389830508475) internal successors, (2598), 59 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:23,282 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:23,282 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:23,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:23,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:23,506 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:23,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1149062991, now seen corresponding path program 13 times [2022-07-13 22:10:23,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:23,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199914303] [2022-07-13 22:10:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:23,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:24,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:24,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199914303] [2022-07-13 22:10:24,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199914303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:24,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971927927] [2022-07-13 22:10:24,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:10:24,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:24,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:24,080 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:24,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 22:10:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-13 22:10:24,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:10:24,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:24,780 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-13 22:10:24,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-13 22:10:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:10:24,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971927927] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:24,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:24,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 14] total 47 [2022-07-13 22:10:24,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741001284] [2022-07-13 22:10:24,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:24,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-13 22:10:24,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-13 22:10:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2003, Unknown=0, NotChecked=0, Total=2162 [2022-07-13 22:10:24,947 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-13 22:10:24,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 541 transitions, 6001 flow. Second operand has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:24,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:24,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-13 22:10:24,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:28,670 INFO L129 PetriNetUnfolder]: 3440/6268 cut-off events. [2022-07-13 22:10:28,670 INFO L130 PetriNetUnfolder]: For 59767/59834 co-relation queries the response was YES. [2022-07-13 22:10:28,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38625 conditions, 6268 events. 3440/6268 cut-off events. For 59767/59834 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 45820 event pairs, 595 based on Foata normal form. 21/6258 useless extension candidates. Maximal degree in co-relation 38532. Up to 4025 conditions per place. [2022-07-13 22:10:28,754 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 539 selfloop transitions, 253 changer transitions 4/834 dead transitions. [2022-07-13 22:10:28,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 834 transitions, 10660 flow [2022-07-13 22:10:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-13 22:10:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-07-13 22:10:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3377 transitions. [2022-07-13 22:10:28,759 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.4581467914801248 [2022-07-13 22:10:28,759 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3377 transitions. [2022-07-13 22:10:28,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3377 transitions. [2022-07-13 22:10:28,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:28,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3377 transitions. [2022-07-13 22:10:28,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 53.6031746031746) internal successors, (3377), 63 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:28,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:28,772 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 117.0) internal successors, (7488), 64 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:28,772 INFO L186 Difference]: Start difference. First operand has 408 places, 541 transitions, 6001 flow. Second operand 63 states and 3377 transitions. [2022-07-13 22:10:28,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 834 transitions, 10660 flow [2022-07-13 22:10:29,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 834 transitions, 10179 flow, removed 149 selfloop flow, removed 42 redundant places. [2022-07-13 22:10:29,147 INFO L242 Difference]: Finished difference. Result has 438 places, 616 transitions, 7211 flow [2022-07-13 22:10:29,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=7211, PETRI_PLACES=438, PETRI_TRANSITIONS=616} [2022-07-13 22:10:29,148 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 334 predicate places. [2022-07-13 22:10:29,148 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 616 transitions, 7211 flow [2022-07-13 22:10:29,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:29,149 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:29,149 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:29,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-13 22:10:29,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:29,349 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:29,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:29,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1238531119, now seen corresponding path program 14 times [2022-07-13 22:10:29,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:29,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105640701] [2022-07-13 22:10:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:29,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:29,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105640701] [2022-07-13 22:10:29,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105640701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278629260] [2022-07-13 22:10:29,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:10:29,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:29,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:30,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 22:10:30,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:10:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:30,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-13 22:10:30,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:10:30,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:30,842 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-13 22:10:30,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-13 22:10:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:10:30,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278629260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:30,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:30,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 14] total 48 [2022-07-13 22:10:30,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721303015] [2022-07-13 22:10:30,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:30,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 22:10:30,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:30,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 22:10:30,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2091, Unknown=0, NotChecked=0, Total=2256 [2022-07-13 22:10:30,972 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-07-13 22:10:30,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 616 transitions, 7211 flow. Second operand has 48 states, 48 states have (on average 51.1875) internal successors, (2457), 48 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:30,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:30,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-07-13 22:10:30,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:34,783 INFO L129 PetriNetUnfolder]: 3680/6721 cut-off events. [2022-07-13 22:10:34,784 INFO L130 PetriNetUnfolder]: For 74160/74223 co-relation queries the response was YES. [2022-07-13 22:10:34,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42934 conditions, 6721 events. 3680/6721 cut-off events. For 74160/74223 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 49923 event pairs, 751 based on Foata normal form. 20/6701 useless extension candidates. Maximal degree in co-relation 42830. Up to 4753 conditions per place. [2022-07-13 22:10:34,868 INFO L132 encePairwiseOnDemand]: 88/117 looper letters, 563 selfloop transitions, 231 changer transitions 4/836 dead transitions. [2022-07-13 22:10:34,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 836 transitions, 11231 flow [2022-07-13 22:10:34,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-13 22:10:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-07-13 22:10:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2986 transitions. [2022-07-13 22:10:34,872 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.45573870573870573 [2022-07-13 22:10:34,872 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2986 transitions. [2022-07-13 22:10:34,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2986 transitions. [2022-07-13 22:10:34,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:34,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2986 transitions. [2022-07-13 22:10:34,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 53.32142857142857) internal successors, (2986), 56 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:34,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 117.0) internal successors, (6669), 57 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:34,885 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 117.0) internal successors, (6669), 57 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:34,885 INFO L186 Difference]: Start difference. First operand has 438 places, 616 transitions, 7211 flow. Second operand 56 states and 2986 transitions. [2022-07-13 22:10:34,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 836 transitions, 11231 flow [2022-07-13 22:10:35,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 836 transitions, 10805 flow, removed 136 selfloop flow, removed 30 redundant places. [2022-07-13 22:10:35,325 INFO L242 Difference]: Finished difference. Result has 470 places, 652 transitions, 8111 flow [2022-07-13 22:10:35,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=6841, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=8111, PETRI_PLACES=470, PETRI_TRANSITIONS=652} [2022-07-13 22:10:35,326 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 366 predicate places. [2022-07-13 22:10:35,326 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 652 transitions, 8111 flow [2022-07-13 22:10:35,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 51.1875) internal successors, (2457), 48 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:35,327 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:35,327 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:35,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-13 22:10:35,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:35,543 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1132419989, now seen corresponding path program 15 times [2022-07-13 22:10:35,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:35,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325647074] [2022-07-13 22:10:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:35,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:36,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:36,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325647074] [2022-07-13 22:10:36,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325647074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:36,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141826847] [2022-07-13 22:10:36,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:10:36,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:36,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:36,388 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:36,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 22:10:36,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 22:10:36,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:36,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-13 22:10:36,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:37,644 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:10:37,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2022-07-13 22:10:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:37,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:38,492 INFO L356 Elim1Store]: treesize reduction 29, result has 67.0 percent of original size [2022-07-13 22:10:38,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 71 [2022-07-13 22:10:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:39,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141826847] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:39,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:39,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 25] total 77 [2022-07-13 22:10:39,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804828668] [2022-07-13 22:10:39,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:39,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-13 22:10:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:39,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-13 22:10:39,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=5413, Unknown=0, NotChecked=0, Total=5852 [2022-07-13 22:10:39,605 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-13 22:10:39,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 652 transitions, 8111 flow. Second operand has 77 states, 77 states have (on average 43.64935064935065) internal successors, (3361), 77 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:39,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:39,606 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-13 22:10:39,607 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:46,807 INFO L129 PetriNetUnfolder]: 4566/8409 cut-off events. [2022-07-13 22:10:46,808 INFO L130 PetriNetUnfolder]: For 100705/100769 co-relation queries the response was YES. [2022-07-13 22:10:46,886 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54347 conditions, 8409 events. 4566/8409 cut-off events. For 100705/100769 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 65920 event pairs, 778 based on Foata normal form. 18/8384 useless extension candidates. Maximal degree in co-relation 54237. Up to 5146 conditions per place. [2022-07-13 22:10:46,919 INFO L132 encePairwiseOnDemand]: 81/117 looper letters, 685 selfloop transitions, 384 changer transitions 10/1114 dead transitions. [2022-07-13 22:10:46,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 1114 transitions, 15769 flow [2022-07-13 22:10:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-07-13 22:10:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-07-13 22:10:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3453 transitions. [2022-07-13 22:10:46,923 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3935042735042735 [2022-07-13 22:10:46,923 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3453 transitions. [2022-07-13 22:10:46,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3453 transitions. [2022-07-13 22:10:46,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:46,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3453 transitions. [2022-07-13 22:10:46,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 46.04) internal successors, (3453), 75 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:46,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 117.0) internal successors, (8892), 76 states have internal predecessors, (8892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:46,936 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 117.0) internal successors, (8892), 76 states have internal predecessors, (8892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:46,936 INFO L186 Difference]: Start difference. First operand has 470 places, 652 transitions, 8111 flow. Second operand 75 states and 3453 transitions. [2022-07-13 22:10:46,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 1114 transitions, 15769 flow [2022-07-13 22:10:47,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1114 transitions, 14809 flow, removed 331 selfloop flow, removed 43 redundant places. [2022-07-13 22:10:47,469 INFO L242 Difference]: Finished difference. Result has 529 places, 854 transitions, 11722 flow [2022-07-13 22:10:47,470 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=7489, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=11722, PETRI_PLACES=529, PETRI_TRANSITIONS=854} [2022-07-13 22:10:47,471 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 425 predicate places. [2022-07-13 22:10:47,471 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 854 transitions, 11722 flow [2022-07-13 22:10:47,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 43.64935064935065) internal successors, (3361), 77 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:47,472 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:47,472 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:47,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:47,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:47,678 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:47,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1005576847, now seen corresponding path program 16 times [2022-07-13 22:10:47,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:47,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849069520] [2022-07-13 22:10:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:47,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:48,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:48,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849069520] [2022-07-13 22:10:48,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849069520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:48,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214170306] [2022-07-13 22:10:48,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:10:48,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:48,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:48,506 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:48,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 22:10:48,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:10:48,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-13 22:10:48,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:10:49,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:49,302 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-13 22:10:49,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2022-07-13 22:10:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:10:49,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214170306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:49,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:49,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21, 14] total 51 [2022-07-13 22:10:49,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724572465] [2022-07-13 22:10:49,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:49,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-13 22:10:49,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:49,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-13 22:10:49,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 22:10:49,421 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-07-13 22:10:49,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 854 transitions, 11722 flow. Second operand has 51 states, 51 states have (on average 44.11764705882353) internal successors, (2250), 51 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:49,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:49,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-07-13 22:10:49,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:10:54,133 INFO L129 PetriNetUnfolder]: 4760/8727 cut-off events. [2022-07-13 22:10:54,133 INFO L130 PetriNetUnfolder]: For 132788/132875 co-relation queries the response was YES. [2022-07-13 22:10:54,324 INFO L84 FinitePrefix]: Finished finitePrefix Result has 64077 conditions, 8727 events. 4760/8727 cut-off events. For 132788/132875 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 68126 event pairs, 1066 based on Foata normal form. 20/8702 useless extension candidates. Maximal degree in co-relation 63940. Up to 6344 conditions per place. [2022-07-13 22:10:54,360 INFO L132 encePairwiseOnDemand]: 86/117 looper letters, 744 selfloop transitions, 228 changer transitions 4/1011 dead transitions. [2022-07-13 22:10:54,360 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 1011 transitions, 15660 flow [2022-07-13 22:10:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-13 22:10:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-07-13 22:10:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2450 transitions. [2022-07-13 22:10:54,363 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.39509756490888565 [2022-07-13 22:10:54,363 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2450 transitions. [2022-07-13 22:10:54,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2450 transitions. [2022-07-13 22:10:54,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:10:54,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2450 transitions. [2022-07-13 22:10:54,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 46.22641509433962) internal successors, (2450), 53 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:54,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 117.0) internal successors, (6318), 54 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:54,372 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 117.0) internal successors, (6318), 54 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:54,372 INFO L186 Difference]: Start difference. First operand has 529 places, 854 transitions, 11722 flow. Second operand 53 states and 2450 transitions. [2022-07-13 22:10:54,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 1011 transitions, 15660 flow [2022-07-13 22:10:55,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 1011 transitions, 14939 flow, removed 292 selfloop flow, removed 38 redundant places. [2022-07-13 22:10:55,135 INFO L242 Difference]: Finished difference. Result has 542 places, 861 transitions, 11631 flow [2022-07-13 22:10:55,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=11011, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=854, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=11631, PETRI_PLACES=542, PETRI_TRANSITIONS=861} [2022-07-13 22:10:55,136 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 438 predicate places. [2022-07-13 22:10:55,136 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 861 transitions, 11631 flow [2022-07-13 22:10:55,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 44.11764705882353) internal successors, (2250), 51 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:55,137 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:10:55,137 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:10:55,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 22:10:55,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:55,343 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:10:55,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:10:55,344 INFO L85 PathProgramCache]: Analyzing trace with hash 191143539, now seen corresponding path program 17 times [2022-07-13 22:10:55,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:10:55,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647158221] [2022-07-13 22:10:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:10:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:10:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:10:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:55,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:10:55,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647158221] [2022-07-13 22:10:55,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647158221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:10:55,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648954715] [2022-07-13 22:10:55,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 22:10:55,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:10:55,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:10:55,994 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:10:56,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 22:10:56,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-13 22:10:56,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:10:56,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-13 22:10:56,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:10:56,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 22:10:56,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:10:56,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:10:56,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:10:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:10:57,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:10:57,266 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-13 22:10:57,283 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-13 22:10:57,287 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)))) 0)) is different from false [2022-07-13 22:10:57,292 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base)) (.cse0 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0)) (* (- 1) (select .cse1 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse1 (+ c_~A~0.offset 4))) (select .cse1 (+ c_~A~0.offset .cse0 4)))) 0)) is different from false [2022-07-13 22:10:57,298 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) (* (- 1) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base) c_~A~0.offset)) c_~counter~0) 0)) is different from false [2022-07-13 22:10:57,304 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~A~0.base) c_~A~0.offset)) c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset))) 0)) is different from false [2022-07-13 22:10:57,316 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ c_~counter~0 (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|))) 0)) is different from false [2022-07-13 22:10:57,327 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)))) 0)) is different from false [2022-07-13 22:10:57,333 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_562 (Array Int Int)) (v_ArrVal_563 (Array Int Int))) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_562))) (+ (* (- 1) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~counter~0)) 0)) is different from false [2022-07-13 22:10:57,354 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:10:57,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2022-07-13 22:10:57,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 290 [2022-07-13 22:10:57,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 274 [2022-07-13 22:10:57,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 258 [2022-07-13 22:10:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 13 not checked. [2022-07-13 22:10:57,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648954715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:10:57,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:10:57,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 23] total 64 [2022-07-13 22:10:57,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966660714] [2022-07-13 22:10:57,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:10:57,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-13 22:10:57,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:10:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-13 22:10:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2796, Unknown=9, NotChecked=1026, Total=4032 [2022-07-13 22:10:57,623 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 117 [2022-07-13 22:10:57,624 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 861 transitions, 11631 flow. Second operand has 64 states, 64 states have (on average 40.890625) internal successors, (2617), 64 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:10:57,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:10:57,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 117 [2022-07-13 22:10:57,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:05,034 INFO L129 PetriNetUnfolder]: 6320/11529 cut-off events. [2022-07-13 22:11:05,034 INFO L130 PetriNetUnfolder]: For 174299/174390 co-relation queries the response was YES. [2022-07-13 22:11:05,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86340 conditions, 11529 events. 6320/11529 cut-off events. For 174299/174390 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 93851 event pairs, 1166 based on Foata normal form. 20/11510 useless extension candidates. Maximal degree in co-relation 86205. Up to 7834 conditions per place. [2022-07-13 22:11:05,204 INFO L132 encePairwiseOnDemand]: 83/117 looper letters, 1014 selfloop transitions, 423 changer transitions 4/1473 dead transitions. [2022-07-13 22:11:05,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 1473 transitions, 24158 flow [2022-07-13 22:11:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-13 22:11:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-07-13 22:11:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 2669 transitions. [2022-07-13 22:11:05,208 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.37396665265517726 [2022-07-13 22:11:05,208 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 2669 transitions. [2022-07-13 22:11:05,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 2669 transitions. [2022-07-13 22:11:05,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:05,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 2669 transitions. [2022-07-13 22:11:05,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 43.75409836065574) internal successors, (2669), 61 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:05,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:05,218 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 117.0) internal successors, (7254), 62 states have internal predecessors, (7254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:05,219 INFO L186 Difference]: Start difference. First operand has 542 places, 861 transitions, 11631 flow. Second operand 61 states and 2669 transitions. [2022-07-13 22:11:05,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 1473 transitions, 24158 flow [2022-07-13 22:11:06,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 1473 transitions, 23559 flow, removed 38 selfloop flow, removed 49 redundant places. [2022-07-13 22:11:06,549 INFO L242 Difference]: Finished difference. Result has 579 places, 1215 transitions, 18982 flow [2022-07-13 22:11:06,550 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=11259, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=18982, PETRI_PLACES=579, PETRI_TRANSITIONS=1215} [2022-07-13 22:11:06,551 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 475 predicate places. [2022-07-13 22:11:06,551 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1215 transitions, 18982 flow [2022-07-13 22:11:06,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 40.890625) internal successors, (2617), 64 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:06,552 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:06,552 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:06,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:06,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:06,776 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash -771135465, now seen corresponding path program 18 times [2022-07-13 22:11:06,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:06,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106451945] [2022-07-13 22:11:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:06,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:07,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:07,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106451945] [2022-07-13 22:11:07,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106451945] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:07,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493938339] [2022-07-13 22:11:07,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 22:11:07,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:07,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:07,452 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:07,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 22:11:07,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-13 22:11:07,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-13 22:11:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:11:08,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:11:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:11:08,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:08,448 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~A~0.base))) (+ (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)))) 0)) is different from false [2022-07-13 22:11:08,460 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~A~0.base))) (+ (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)))) 0)) is different from false [2022-07-13 22:11:08,464 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_592 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_592) c_~A~0.base))) (+ (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)))) 0)) is different from false [2022-07-13 22:11:08,493 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-13 22:11:08,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-13 22:11:08,510 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-13 22:11:08,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-13 22:11:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-07-13 22:11:08,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493938339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:08,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:08,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 21, 21] total 57 [2022-07-13 22:11:08,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814712490] [2022-07-13 22:11:08,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:08,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-13 22:11:08,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-13 22:11:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2691, Unknown=3, NotChecked=318, Total=3192 [2022-07-13 22:11:08,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-13 22:11:08,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1215 transitions, 18982 flow. Second operand has 57 states, 57 states have (on average 42.05263157894737) internal successors, (2397), 57 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:08,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:08,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-13 22:11:08,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:16,496 INFO L129 PetriNetUnfolder]: 7049/12919 cut-off events. [2022-07-13 22:11:16,497 INFO L130 PetriNetUnfolder]: For 339589/339738 co-relation queries the response was YES. [2022-07-13 22:11:16,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115209 conditions, 12919 events. 7049/12919 cut-off events. For 339589/339738 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 108110 event pairs, 1607 based on Foata normal form. 41/12890 useless extension candidates. Maximal degree in co-relation 115049. Up to 9093 conditions per place. [2022-07-13 22:11:16,721 INFO L132 encePairwiseOnDemand]: 85/117 looper letters, 958 selfloop transitions, 485 changer transitions 4/1479 dead transitions. [2022-07-13 22:11:16,722 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1479 transitions, 26102 flow [2022-07-13 22:11:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-13 22:11:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-07-13 22:11:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2237 transitions. [2022-07-13 22:11:16,724 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3823931623931624 [2022-07-13 22:11:16,725 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2237 transitions. [2022-07-13 22:11:16,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2237 transitions. [2022-07-13 22:11:16,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:16,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2237 transitions. [2022-07-13 22:11:16,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 44.74) internal successors, (2237), 50 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:16,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 117.0) internal successors, (5967), 51 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:16,741 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 117.0) internal successors, (5967), 51 states have internal predecessors, (5967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:16,741 INFO L186 Difference]: Start difference. First operand has 579 places, 1215 transitions, 18982 flow. Second operand 50 states and 2237 transitions. [2022-07-13 22:11:16,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1479 transitions, 26102 flow [2022-07-13 22:11:18,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1479 transitions, 25450 flow, removed 207 selfloop flow, removed 28 redundant places. [2022-07-13 22:11:18,713 INFO L242 Difference]: Finished difference. Result has 611 places, 1317 transitions, 21841 flow [2022-07-13 22:11:18,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=18424, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=21841, PETRI_PLACES=611, PETRI_TRANSITIONS=1317} [2022-07-13 22:11:18,714 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 507 predicate places. [2022-07-13 22:11:18,714 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 1317 transitions, 21841 flow [2022-07-13 22:11:18,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 42.05263157894737) internal successors, (2397), 57 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:18,714 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:18,714 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:18,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:18,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-13 22:11:18,915 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2086619099, now seen corresponding path program 19 times [2022-07-13 22:11:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:18,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972574879] [2022-07-13 22:11:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:18,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:19,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:19,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972574879] [2022-07-13 22:11:19,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972574879] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:19,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219605188] [2022-07-13 22:11:19,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 22:11:19,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:19,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:19,577 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:19,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 22:11:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-13 22:11:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:19,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:11:19,764 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:11:19,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:11:20,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:11:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:11:20,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:20,464 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0)) is different from false [2022-07-13 22:11:20,480 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-13 22:11:20,488 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_622 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_622) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-13 22:11:20,519 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-13 22:11:20,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-13 22:11:20,536 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-13 22:11:20,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-13 22:11:20,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 22:11:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-07-13 22:11:20,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219605188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:20,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:20,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 21] total 57 [2022-07-13 22:11:20,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376820077] [2022-07-13 22:11:20,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:20,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-13 22:11:20,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-13 22:11:20,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2669, Unknown=3, NotChecked=318, Total=3192 [2022-07-13 22:11:20,917 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-13 22:11:20,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 1317 transitions, 21841 flow. Second operand has 57 states, 57 states have (on average 41.91228070175438) internal successors, (2389), 57 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:20,918 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:20,918 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-13 22:11:20,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:30,064 INFO L129 PetriNetUnfolder]: 8591/15839 cut-off events. [2022-07-13 22:11:30,064 INFO L130 PetriNetUnfolder]: For 467646/467791 co-relation queries the response was YES. [2022-07-13 22:11:30,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 148210 conditions, 15839 events. 8591/15839 cut-off events. For 467646/467791 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 136120 event pairs, 1836 based on Foata normal form. 49/15817 useless extension candidates. Maximal degree in co-relation 148038. Up to 10046 conditions per place. [2022-07-13 22:11:30,421 INFO L132 encePairwiseOnDemand]: 84/117 looper letters, 1242 selfloop transitions, 820 changer transitions 8/2102 dead transitions. [2022-07-13 22:11:30,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 2102 transitions, 40509 flow [2022-07-13 22:11:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-13 22:11:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-07-13 22:11:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 3469 transitions. [2022-07-13 22:11:30,426 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.38012272627657245 [2022-07-13 22:11:30,426 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 3469 transitions. [2022-07-13 22:11:30,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 3469 transitions. [2022-07-13 22:11:30,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:30,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 3469 transitions. [2022-07-13 22:11:30,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 44.47435897435897) internal successors, (3469), 78 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:30,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 117.0) internal successors, (9243), 79 states have internal predecessors, (9243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:30,439 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 117.0) internal successors, (9243), 79 states have internal predecessors, (9243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:30,439 INFO L186 Difference]: Start difference. First operand has 611 places, 1317 transitions, 21841 flow. Second operand 78 states and 3469 transitions. [2022-07-13 22:11:30,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 2102 transitions, 40509 flow [2022-07-13 22:11:33,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 2102 transitions, 39748 flow, removed 268 selfloop flow, removed 33 redundant places. [2022-07-13 22:11:33,540 INFO L242 Difference]: Finished difference. Result has 691 places, 1803 transitions, 34108 flow [2022-07-13 22:11:33,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=21092, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=34108, PETRI_PLACES=691, PETRI_TRANSITIONS=1803} [2022-07-13 22:11:33,543 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 587 predicate places. [2022-07-13 22:11:33,543 INFO L495 AbstractCegarLoop]: Abstraction has has 691 places, 1803 transitions, 34108 flow [2022-07-13 22:11:33,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 41.91228070175438) internal successors, (2389), 57 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:33,543 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:33,544 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:33,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-13 22:11:33,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-13 22:11:33,750 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1982964057, now seen corresponding path program 20 times [2022-07-13 22:11:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:33,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234682975] [2022-07-13 22:11:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:34,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:34,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234682975] [2022-07-13 22:11:34,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234682975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:34,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459809020] [2022-07-13 22:11:34,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:11:34,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:34,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:34,383 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:34,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 22:11:34,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:11:34,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-13 22:11:34,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 22:11:34,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:11:35,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 22:11:35,099 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:11:35,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-07-13 22:11:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 22:11:35,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:11:35,315 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-13 22:11:35,327 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~A~0.base))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-13 22:11:35,331 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_651 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_651) c_~A~0.base))) (+ c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-13 22:11:35,363 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-13 22:11:35,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-13 22:11:35,384 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-13 22:11:35,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-13 22:11:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-07-13 22:11:35,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459809020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:11:35,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:11:35,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 21] total 57 [2022-07-13 22:11:35,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164020725] [2022-07-13 22:11:35,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:11:35,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-13 22:11:35,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:11:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-13 22:11:35,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2688, Unknown=3, NotChecked=318, Total=3192 [2022-07-13 22:11:35,862 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-13 22:11:35,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 1803 transitions, 34108 flow. Second operand has 57 states, 57 states have (on average 42.01754385964912) internal successors, (2395), 57 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:35,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:11:35,863 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-13 22:11:35,863 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:11:50,040 INFO L129 PetriNetUnfolder]: 9890/18288 cut-off events. [2022-07-13 22:11:50,041 INFO L130 PetriNetUnfolder]: For 1442790/1443011 co-relation queries the response was YES. [2022-07-13 22:11:50,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219193 conditions, 18288 events. 9890/18288 cut-off events. For 1442790/1443011 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 161420 event pairs, 2111 based on Foata normal form. 124/18332 useless extension candidates. Maximal degree in co-relation 218984. Up to 10746 conditions per place. [2022-07-13 22:11:50,616 INFO L132 encePairwiseOnDemand]: 84/117 looper letters, 1205 selfloop transitions, 1261 changer transitions 4/2502 dead transitions. [2022-07-13 22:11:50,616 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 2502 transitions, 54277 flow [2022-07-13 22:11:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-13 22:11:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-13 22:11:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3152 transitions. [2022-07-13 22:11:50,619 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.37943902732635126 [2022-07-13 22:11:50,619 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3152 transitions. [2022-07-13 22:11:50,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3152 transitions. [2022-07-13 22:11:50,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:11:50,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3152 transitions. [2022-07-13 22:11:50,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 44.394366197183096) internal successors, (3152), 71 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:50,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 117.0) internal successors, (8424), 72 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:50,630 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 117.0) internal successors, (8424), 72 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:50,631 INFO L186 Difference]: Start difference. First operand has 691 places, 1803 transitions, 34108 flow. Second operand 71 states and 3152 transitions. [2022-07-13 22:11:50,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 2502 transitions, 54277 flow [2022-07-13 22:11:57,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 719 places, 2502 transitions, 52715 flow, removed 645 selfloop flow, removed 38 redundant places. [2022-07-13 22:11:57,784 INFO L242 Difference]: Finished difference. Result has 738 places, 2196 transitions, 45047 flow [2022-07-13 22:11:57,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=32754, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=915, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=45047, PETRI_PLACES=738, PETRI_TRANSITIONS=2196} [2022-07-13 22:11:57,786 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 634 predicate places. [2022-07-13 22:11:57,787 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 2196 transitions, 45047 flow [2022-07-13 22:11:57,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 42.01754385964912) internal successors, (2395), 57 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:11:57,787 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:11:57,787 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:11:57,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 22:11:58,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 22:11:58,003 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:11:58,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:11:58,004 INFO L85 PathProgramCache]: Analyzing trace with hash 722800081, now seen corresponding path program 21 times [2022-07-13 22:11:58,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:11:58,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085046746] [2022-07-13 22:11:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:11:58,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:11:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:11:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:11:58,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:11:58,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085046746] [2022-07-13 22:11:58,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085046746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:11:58,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887382831] [2022-07-13 22:11:58,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:11:58,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:11:58,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:11:58,775 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:11:58,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 22:11:58,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 22:11:58,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:11:58,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-13 22:11:58,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:11:58,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:11:59,098 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:11:59,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:11:59,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 22:11:59,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:11:59,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-13 22:12:00,120 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:12:00,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-07-13 22:12:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:00,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:00,776 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) is different from false [2022-07-13 22:12:00,786 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) (not (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0))) is different from false [2022-07-13 22:12:00,832 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (= 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4))))) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) (not (< (+ |c_thread1Thread1of1ForFork0_#t~post1#1| 1) c_~N~0))) is different from false [2022-07-13 22:12:03,057 WARN L833 $PredicateComparison]: unable to prove that (or (not (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0)) (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse0 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)) (.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse0)) (select .cse1 (+ c_~A~0.offset .cse0 4)) (* (- 1) (select .cse1 c_~A~0.offset)) (* (- 1) (select .cse1 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0)) 0)))) is different from false [2022-07-13 22:12:03,082 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse0 (+ c_~A~0.offset 4)))) 0) (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)))) (not (< 1 c_~N~0))) is different from false [2022-07-13 22:12:03,112 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse1 (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) c_~A~0.base))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) (* (- 1) (select .cse1 (+ c_~A~0.offset (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) c_~counter~0 (select .cse1 (+ c_~A~0.offset 4)) (* (- 1) (select .cse1 c_~A~0.offset))))) 0))) (not (< 1 c_~N~0))) is different from false [2022-07-13 22:12:03,164 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_main_#t~ret8#1.base|))) (+ (* (- 1) (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select .cse0 (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| 4)) (select (select .cse1 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|) c_~counter~0 (* (- 1) (select .cse0 (+ |c_ULTIMATE.start_main_#t~ret8#1.offset| (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|))))))) 0))) (not (< 1 c_~N~0))) is different from false [2022-07-13 22:12:03,191 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_683 (Array Int Int)) (v_ArrVal_684 (Array Int Int)) (|v_thread2Thread1of1ForFork1_~i~1#1_95| Int)) (or (< (+ 1 |v_thread2Thread1of1ForFork1_~i~1#1_95|) c_~N~0) (not (< |v_thread2Thread1of1ForFork1_~i~1#1_95| c_~N~0)) (= (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_683))) (let ((.cse0 (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_684) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| 4)) c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) (* (- 1) (select .cse0 (+ |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset| (* 4 |v_thread2Thread1of1ForFork1_~i~1#1_95|)))) (* (- 1) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))))) 0))) (not (< 1 c_~N~0))) is different from false [2022-07-13 22:12:03,662 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:12:03,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 68 [2022-07-13 22:12:03,679 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-13 22:12:03,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 244 [2022-07-13 22:12:03,695 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-13 22:12:03,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 216 [2022-07-13 22:12:03,713 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-07-13 22:12:03,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 168 [2022-07-13 22:12:04,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 22:12:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-13 22:12:04,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887382831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:04,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:04,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 91 [2022-07-13 22:12:04,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376189537] [2022-07-13 22:12:04,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:04,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-13 22:12:04,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-13 22:12:04,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=6269, Unknown=108, NotChecked=1352, Total=8190 [2022-07-13 22:12:04,932 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 117 [2022-07-13 22:12:04,933 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 2196 transitions, 45047 flow. Second operand has 91 states, 91 states have (on average 40.2967032967033) internal successors, (3667), 91 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:04,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:04,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 117 [2022-07-13 22:12:04,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:12:26,488 INFO L129 PetriNetUnfolder]: 12265/22852 cut-off events. [2022-07-13 22:12:26,488 INFO L130 PetriNetUnfolder]: For 1795430/1795738 co-relation queries the response was YES. [2022-07-13 22:12:26,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273291 conditions, 22852 events. 12265/22852 cut-off events. For 1795430/1795738 co-relation queries the response was YES. Maximal size of possible extension queue 1073. Compared 209406 event pairs, 2045 based on Foata normal form. 84/22881 useless extension candidates. Maximal degree in co-relation 273066. Up to 12336 conditions per place. [2022-07-13 22:12:27,079 INFO L132 encePairwiseOnDemand]: 78/117 looper letters, 1448 selfloop transitions, 1793 changer transitions 8/3281 dead transitions. [2022-07-13 22:12:27,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 3281 transitions, 73452 flow [2022-07-13 22:12:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-13 22:12:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-07-13 22:12:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 3930 transitions. [2022-07-13 22:12:27,083 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3732193732193732 [2022-07-13 22:12:27,083 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 3930 transitions. [2022-07-13 22:12:27,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 3930 transitions. [2022-07-13 22:12:27,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:12:27,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 3930 transitions. [2022-07-13 22:12:27,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 43.666666666666664) internal successors, (3930), 90 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:27,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 117.0) internal successors, (10647), 91 states have internal predecessors, (10647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:27,095 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 117.0) internal successors, (10647), 91 states have internal predecessors, (10647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:27,095 INFO L186 Difference]: Start difference. First operand has 738 places, 2196 transitions, 45047 flow. Second operand 90 states and 3930 transitions. [2022-07-13 22:12:27,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 3281 transitions, 73452 flow [2022-07-13 22:12:37,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 788 places, 3281 transitions, 72170 flow, removed 412 selfloop flow, removed 37 redundant places. [2022-07-13 22:12:37,253 INFO L242 Difference]: Finished difference. Result has 829 places, 2901 transitions, 65311 flow [2022-07-13 22:12:37,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=43941, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=65311, PETRI_PLACES=829, PETRI_TRANSITIONS=2901} [2022-07-13 22:12:37,256 INFO L279 CegarLoopForPetriNet]: 104 programPoint places, 725 predicate places. [2022-07-13 22:12:37,256 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2901 transitions, 65311 flow [2022-07-13 22:12:37,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 40.2967032967033) internal successors, (3667), 91 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:37,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:12:37,257 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:12:37,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 22:12:37,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:37,457 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:12:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:12:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash 529348009, now seen corresponding path program 22 times [2022-07-13 22:12:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:12:37,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848503308] [2022-07-13 22:12:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:12:37,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:12:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:12:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:12:38,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:12:38,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848503308] [2022-07-13 22:12:38,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848503308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:12:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336962286] [2022-07-13 22:12:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 22:12:38,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:12:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:12:38,148 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:12:38,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 22:12:38,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 22:12:38,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:12:38,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-13 22:12:38,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:12:38,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:12:38,330 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-13 22:12:38,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-13 22:12:38,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-13 22:12:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:12:38,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:12:39,153 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~A~0.base))) (+ c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))) (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) 0)) is different from false [2022-07-13 22:12:39,167 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))) 0)) is different from false [2022-07-13 22:12:39,171 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (= 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)) c_~counter~0 (* (- 1) (select .cse0 c_~A~0.offset)) (* (- 1) (select .cse0 (+ c_~A~0.offset 4))))))) is different from false [2022-07-13 22:12:39,202 INFO L356 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2022-07-13 22:12:39,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 89 [2022-07-13 22:12:39,220 INFO L356 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2022-07-13 22:12:39,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2022-07-13 22:12:39,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 22:12:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 3 not checked. [2022-07-13 22:12:39,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336962286] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:12:39,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:12:39,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 23, 21] total 60 [2022-07-13 22:12:39,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335303861] [2022-07-13 22:12:39,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:12:39,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-13 22:12:39,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:12:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-13 22:12:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2978, Unknown=3, NotChecked=336, Total=3540 [2022-07-13 22:12:39,835 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 117 [2022-07-13 22:12:39,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2901 transitions, 65311 flow. Second operand has 60 states, 60 states have (on average 42.13333333333333) internal successors, (2528), 60 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 22:12:39,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:12:39,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 117 [2022-07-13 22:12:39,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand