./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/unroll-cond-2.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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 21:45:55,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:45:55,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:45:55,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:45:55,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:45:55,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:45:55,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:45:55,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:45:55,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:45:55,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:45:55,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:45:55,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:45:55,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:45:55,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:45:55,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:45:55,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:45:55,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:45:55,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:45:55,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:45:55,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:45:55,639 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:45:55,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:45:55,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:45:55,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:45:55,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:45:55,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:45:55,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:45:55,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:45:55,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:45:55,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:45:55,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:45:55,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:45:55,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:45:55,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:45:55,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:45:55,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:45:55,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:45:55,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:45:55,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:45:55,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:45:55,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:45:55,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:45:55,654 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:45:55,671 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:45:55,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:45:55,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:45:55,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:45:55,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:45:55,673 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:45:55,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:45:55,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:45:55,674 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:45:55,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:45:55,675 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:45:55,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:45:55,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:45:55,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:45:55,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:45:55,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:45:55,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:45:55,676 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:45:55,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:45:55,678 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:45:55,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:45:55,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:45:55,679 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:45:55,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:45:55,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:45:55,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:45:55,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:45:55,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:45:55,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:45:55,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:45:55,680 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:45:55,681 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:45:55,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:45:55,681 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2022-07-19 21:45:55,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:45:55,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:45:55,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:45:55,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:45:55,918 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:45:55,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-07-19 21:45:55,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de774df67/3d2a2889fa2043b5b6db067b1c88b410/FLAGba901de34 [2022-07-19 21:45:56,355 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:45:56,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2022-07-19 21:45:56,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de774df67/3d2a2889fa2043b5b6db067b1c88b410/FLAGba901de34 [2022-07-19 21:45:56,377 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de774df67/3d2a2889fa2043b5b6db067b1c88b410 [2022-07-19 21:45:56,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:45:56,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:45:56,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:45:56,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:45:56,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:45:56,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7e0f8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56, skipping insertion in model container [2022-07-19 21:45:56,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:45:56,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:45:56,602 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/unroll-cond-2.wvr.c[2474,2487] [2022-07-19 21:45:56,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:45:56,626 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:45:56,656 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/unroll-cond-2.wvr.c[2474,2487] [2022-07-19 21:45:56,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:45:56,671 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:45:56,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56 WrapperNode [2022-07-19 21:45:56,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:45:56,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:45:56,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:45:56,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:45:56,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,714 INFO L137 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2022-07-19 21:45:56,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:45:56,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:45:56,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:45:56,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:45:56,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:45:56,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:45:56,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:45:56,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:45:56,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (1/1) ... [2022-07-19 21:45:56,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:45:56,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:45:56,771 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) [2022-07-19 21:45:56,776 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 [2022-07-19 21:45:56,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:45:56,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-19 21:45:56,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-19 21:45:56,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-19 21:45:56,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-19 21:45:56,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:45:56,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:45:56,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:45:56,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 21:45:56,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:45:56,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:45:56,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:45:56,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:45:56,806 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:45:56,870 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:45:56,871 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:45:57,055 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:45:57,063 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:45:57,064 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:45:57,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:57 BoogieIcfgContainer [2022-07-19 21:45:57,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:45:57,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:45:57,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:45:57,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:45:57,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:45:56" (1/3) ... [2022-07-19 21:45:57,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68364c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:57, skipping insertion in model container [2022-07-19 21:45:57,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:56" (2/3) ... [2022-07-19 21:45:57,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68364c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:57, skipping insertion in model container [2022-07-19 21:45:57,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:57" (3/3) ... [2022-07-19 21:45:57,073 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2022-07-19 21:45:57,077 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:45:57,085 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:45:57,085 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 21:45:57,085 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:45:57,180 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:45:57,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 374 flow [2022-07-19 21:45:57,336 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2022-07-19 21:45:57,336 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:45:57,342 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-07-19 21:45:57,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 374 flow [2022-07-19 21:45:57,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2022-07-19 21:45:57,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:45:57,365 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@67f0ed4d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5534b3b7 [2022-07-19 21:45:57,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-19 21:45:57,403 INFO L129 PetriNetUnfolder]: 14/165 cut-off events. [2022-07-19 21:45:57,403 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:45:57,403 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:57,404 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] [2022-07-19 21:45:57,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:57,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2050850175, now seen corresponding path program 1 times [2022-07-19 21:45:57,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:57,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964752267] [2022-07-19 21:45:57,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:57,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:57,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:57,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964752267] [2022-07-19 21:45:57,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964752267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:57,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:57,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:45:57,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859668768] [2022-07-19 21:45:57,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:57,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:45:57,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:57,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:45:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:45:57,762 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 179 [2022-07-19 21:45:57,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 168 transitions, 348 flow. Second operand has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:57,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:57,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 179 [2022-07-19 21:45:57,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:57,838 INFO L129 PetriNetUnfolder]: 4/157 cut-off events. [2022-07-19 21:45:57,838 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-19 21:45:57,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 157 events. 4/157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 202 event pairs, 0 based on Foata normal form. 14/159 useless extension candidates. Maximal degree in co-relation 97. Up to 5 conditions per place. [2022-07-19 21:45:57,843 INFO L132 encePairwiseOnDemand]: 168/179 looper letters, 4 selfloop transitions, 0 changer transitions 4/157 dead transitions. [2022-07-19 21:45:57,843 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 334 flow [2022-07-19 21:45:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:45:57,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:45:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 341 transitions. [2022-07-19 21:45:57,861 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.952513966480447 [2022-07-19 21:45:57,862 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 341 transitions. [2022-07-19 21:45:57,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 341 transitions. [2022-07-19 21:45:57,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:57,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 341 transitions. [2022-07-19 21:45:57,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 170.5) internal successors, (341), 2 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:57,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:57,912 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:57,914 INFO L186 Difference]: Start difference. First operand has 160 places, 168 transitions, 348 flow. Second operand 2 states and 341 transitions. [2022-07-19 21:45:57,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 334 flow [2022-07-19 21:45:57,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-19 21:45:57,924 INFO L242 Difference]: Finished difference. Result has 157 places, 153 transitions, 310 flow [2022-07-19 21:45:57,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=310, PETRI_PLACES=157, PETRI_TRANSITIONS=153} [2022-07-19 21:45:57,933 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, -3 predicate places. [2022-07-19 21:45:57,934 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 153 transitions, 310 flow [2022-07-19 21:45:57,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:57,935 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:57,935 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] [2022-07-19 21:45:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:45:57,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:57,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1248426905, now seen corresponding path program 1 times [2022-07-19 21:45:57,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:57,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903232488] [2022-07-19 21:45:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:57,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:58,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:58,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903232488] [2022-07-19 21:45:58,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903232488] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:58,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:58,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 21:45:58,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686484310] [2022-07-19 21:45:58,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:58,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 21:45:58,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 21:45:58,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 21:45:58,236 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 179 [2022-07-19 21:45:58,237 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 153 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 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) [2022-07-19 21:45:58,237 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:58,237 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 179 [2022-07-19 21:45:58,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:58,369 INFO L129 PetriNetUnfolder]: 105/567 cut-off events. [2022-07-19 21:45:58,369 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-07-19 21:45:58,373 INFO L84 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 567 events. 105/567 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2597 event pairs, 29 based on Foata normal form. 0/486 useless extension candidates. Maximal degree in co-relation 753. Up to 111 conditions per place. [2022-07-19 21:45:58,375 INFO L132 encePairwiseOnDemand]: 173/179 looper letters, 30 selfloop transitions, 6 changer transitions 0/170 dead transitions. [2022-07-19 21:45:58,376 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 170 transitions, 418 flow [2022-07-19 21:45:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 21:45:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-19 21:45:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 629 transitions. [2022-07-19 21:45:58,379 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8784916201117319 [2022-07-19 21:45:58,379 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 629 transitions. [2022-07-19 21:45:58,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 629 transitions. [2022-07-19 21:45:58,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:58,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 629 transitions. [2022-07-19 21:45:58,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.25) internal successors, (629), 4 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:58,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:58,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:58,385 INFO L186 Difference]: Start difference. First operand has 157 places, 153 transitions, 310 flow. Second operand 4 states and 629 transitions. [2022-07-19 21:45:58,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 170 transitions, 418 flow [2022-07-19 21:45:58,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 170 transitions, 418 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:45:58,389 INFO L242 Difference]: Finished difference. Result has 158 places, 158 transitions, 350 flow [2022-07-19 21:45:58,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=158, PETRI_TRANSITIONS=158} [2022-07-19 21:45:58,391 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, -2 predicate places. [2022-07-19 21:45:58,391 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 158 transitions, 350 flow [2022-07-19 21:45:58,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.5) internal successors, (602), 4 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) [2022-07-19 21:45:58,392 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:58,393 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:58,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:45:58,394 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:58,397 INFO L85 PathProgramCache]: Analyzing trace with hash -5255025, now seen corresponding path program 1 times [2022-07-19 21:45:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:58,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341477364] [2022-07-19 21:45:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:58,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:58,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341477364] [2022-07-19 21:45:58,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341477364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:58,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:58,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:45:58,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779300288] [2022-07-19 21:45:58,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:58,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:45:58,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:58,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:45:58,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:45:58,558 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-19 21:45:58,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 158 transitions, 350 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:58,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:58,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-19 21:45:58,560 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:58,850 INFO L129 PetriNetUnfolder]: 236/1284 cut-off events. [2022-07-19 21:45:58,850 INFO L130 PetriNetUnfolder]: For 130/132 co-relation queries the response was YES. [2022-07-19 21:45:58,854 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 1284 events. 236/1284 cut-off events. For 130/132 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 8717 event pairs, 108 based on Foata normal form. 6/1205 useless extension candidates. Maximal degree in co-relation 1934. Up to 256 conditions per place. [2022-07-19 21:45:58,861 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 60 selfloop transitions, 7 changer transitions 1/199 dead transitions. [2022-07-19 21:45:58,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 199 transitions, 627 flow [2022-07-19 21:45:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:45:58,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:45:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 927 transitions. [2022-07-19 21:45:58,865 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8631284916201117 [2022-07-19 21:45:58,865 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 927 transitions. [2022-07-19 21:45:58,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 927 transitions. [2022-07-19 21:45:58,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:58,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 927 transitions. [2022-07-19 21:45:58,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 154.5) internal successors, (927), 6 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:58,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:58,873 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:58,873 INFO L186 Difference]: Start difference. First operand has 158 places, 158 transitions, 350 flow. Second operand 6 states and 927 transitions. [2022-07-19 21:45:58,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 199 transitions, 627 flow [2022-07-19 21:45:58,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 199 transitions, 627 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:45:58,881 INFO L242 Difference]: Finished difference. Result has 166 places, 162 transitions, 398 flow [2022-07-19 21:45:58,881 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=398, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2022-07-19 21:45:58,883 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 6 predicate places. [2022-07-19 21:45:58,884 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 398 flow [2022-07-19 21:45:58,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:58,885 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:58,885 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:58,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:45:58,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:58,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:58,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1123750283, now seen corresponding path program 2 times [2022-07-19 21:45:58,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:58,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255176032] [2022-07-19 21:45:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:58,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:59,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255176032] [2022-07-19 21:45:59,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255176032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:59,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:59,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 21:45:59,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322982540] [2022-07-19 21:45:59,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:59,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 21:45:59,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:59,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 21:45:59,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 21:45:59,122 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-19 21:45:59,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 398 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:59,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-19 21:45:59,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:59,356 INFO L129 PetriNetUnfolder]: 264/1409 cut-off events. [2022-07-19 21:45:59,357 INFO L130 PetriNetUnfolder]: For 392/404 co-relation queries the response was YES. [2022-07-19 21:45:59,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1409 events. 264/1409 cut-off events. For 392/404 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 9977 event pairs, 114 based on Foata normal form. 4/1316 useless extension candidates. Maximal degree in co-relation 2365. Up to 263 conditions per place. [2022-07-19 21:45:59,368 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 59 selfloop transitions, 12 changer transitions 1/203 dead transitions. [2022-07-19 21:45:59,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 203 transitions, 704 flow [2022-07-19 21:45:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 21:45:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-19 21:45:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 786 transitions. [2022-07-19 21:45:59,371 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8782122905027933 [2022-07-19 21:45:59,371 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 786 transitions. [2022-07-19 21:45:59,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 786 transitions. [2022-07-19 21:45:59,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:59,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 786 transitions. [2022-07-19 21:45:59,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.2) internal successors, (786), 5 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,380 INFO L186 Difference]: Start difference. First operand has 166 places, 162 transitions, 398 flow. Second operand 5 states and 786 transitions. [2022-07-19 21:45:59,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 203 transitions, 704 flow [2022-07-19 21:45:59,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 203 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:45:59,389 INFO L242 Difference]: Finished difference. Result has 171 places, 170 transitions, 496 flow [2022-07-19 21:45:59,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=171, PETRI_TRANSITIONS=170} [2022-07-19 21:45:59,391 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 11 predicate places. [2022-07-19 21:45:59,392 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 170 transitions, 496 flow [2022-07-19 21:45:59,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,397 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:59,397 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:59,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:45:59,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash 561552515, now seen corresponding path program 3 times [2022-07-19 21:45:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:59,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500509626] [2022-07-19 21:45:59,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:59,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:59,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:59,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500509626] [2022-07-19 21:45:59,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500509626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:59,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:45:59,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 21:45:59,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967350362] [2022-07-19 21:45:59,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:45:59,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 21:45:59,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:45:59,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 21:45:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 21:45:59,583 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-19 21:45:59,585 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 170 transitions, 496 flow. Second operand has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:45:59,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-19 21:45:59,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:45:59,819 INFO L129 PetriNetUnfolder]: 268/1401 cut-off events. [2022-07-19 21:45:59,819 INFO L130 PetriNetUnfolder]: For 760/768 co-relation queries the response was YES. [2022-07-19 21:45:59,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 1401 events. 268/1401 cut-off events. For 760/768 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 9855 event pairs, 101 based on Foata normal form. 6/1312 useless extension candidates. Maximal degree in co-relation 2532. Up to 263 conditions per place. [2022-07-19 21:45:59,828 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 69 selfloop transitions, 17 changer transitions 1/218 dead transitions. [2022-07-19 21:45:59,828 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 218 transitions, 872 flow [2022-07-19 21:45:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 21:45:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-19 21:45:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 942 transitions. [2022-07-19 21:45:59,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8770949720670391 [2022-07-19 21:45:59,834 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 942 transitions. [2022-07-19 21:45:59,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 942 transitions. [2022-07-19 21:45:59,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:45:59,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 942 transitions. [2022-07-19 21:45:59,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,839 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,839 INFO L186 Difference]: Start difference. First operand has 171 places, 170 transitions, 496 flow. Second operand 6 states and 942 transitions. [2022-07-19 21:45:59,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 218 transitions, 872 flow [2022-07-19 21:45:59,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 218 transitions, 860 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-07-19 21:45:59,846 INFO L242 Difference]: Finished difference. Result has 178 places, 176 transitions, 604 flow [2022-07-19 21:45:59,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=604, PETRI_PLACES=178, PETRI_TRANSITIONS=176} [2022-07-19 21:45:59,847 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 18 predicate places. [2022-07-19 21:45:59,847 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 176 transitions, 604 flow [2022-07-19 21:45:59,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.16666666666666) internal successors, (883), 6 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:45:59,848 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:45:59,848 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:45:59,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 21:45:59,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:45:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:45:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash -571169239, now seen corresponding path program 4 times [2022-07-19 21:45:59,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:45:59,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485703009] [2022-07-19 21:45:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:45:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:45:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:45:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:45:59,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:45:59,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485703009] [2022-07-19 21:45:59,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485703009] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:45:59,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:00,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:46:00,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252781376] [2022-07-19 21:46:00,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:00,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:46:00,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:46:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:46:00,003 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-19 21:46:00,004 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 176 transitions, 604 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:00,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-19 21:46:00,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:00,287 INFO L129 PetriNetUnfolder]: 274/1480 cut-off events. [2022-07-19 21:46:00,287 INFO L130 PetriNetUnfolder]: For 1256/1258 co-relation queries the response was YES. [2022-07-19 21:46:00,293 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2852 conditions, 1480 events. 274/1480 cut-off events. For 1256/1258 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 10598 event pairs, 100 based on Foata normal form. 6/1387 useless extension candidates. Maximal degree in co-relation 2836. Up to 292 conditions per place. [2022-07-19 21:46:00,298 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 63 selfloop transitions, 23 changer transitions 1/218 dead transitions. [2022-07-19 21:46:00,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 218 transitions, 1002 flow [2022-07-19 21:46:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 21:46:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-19 21:46:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1076 transitions. [2022-07-19 21:46:00,301 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8587390263367917 [2022-07-19 21:46:00,302 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1076 transitions. [2022-07-19 21:46:00,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1076 transitions. [2022-07-19 21:46:00,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:00,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1076 transitions. [2022-07-19 21:46:00,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 153.71428571428572) internal successors, (1076), 7 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,307 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,307 INFO L186 Difference]: Start difference. First operand has 178 places, 176 transitions, 604 flow. Second operand 7 states and 1076 transitions. [2022-07-19 21:46:00,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 218 transitions, 1002 flow [2022-07-19 21:46:00,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 218 transitions, 975 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-19 21:46:00,315 INFO L242 Difference]: Finished difference. Result has 186 places, 181 transitions, 699 flow [2022-07-19 21:46:00,316 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=699, PETRI_PLACES=186, PETRI_TRANSITIONS=181} [2022-07-19 21:46:00,316 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 26 predicate places. [2022-07-19 21:46:00,317 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 181 transitions, 699 flow [2022-07-19 21:46:00,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,317 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:00,317 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, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:00,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 21:46:00,318 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:00,319 INFO L85 PathProgramCache]: Analyzing trace with hash -831138031, now seen corresponding path program 5 times [2022-07-19 21:46:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:00,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258063944] [2022-07-19 21:46:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:00,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:00,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:00,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258063944] [2022-07-19 21:46:00,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258063944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:00,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:00,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 21:46:00,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680830235] [2022-07-19 21:46:00,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:00,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 21:46:00,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:00,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 21:46:00,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 21:46:00,429 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 179 [2022-07-19 21:46:00,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 181 transitions, 699 flow. Second operand has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:00,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 179 [2022-07-19 21:46:00,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:00,727 INFO L129 PetriNetUnfolder]: 274/1433 cut-off events. [2022-07-19 21:46:00,727 INFO L130 PetriNetUnfolder]: For 1948/1948 co-relation queries the response was YES. [2022-07-19 21:46:00,733 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 1433 events. 274/1433 cut-off events. For 1948/1948 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 10116 event pairs, 102 based on Foata normal form. 3/1337 useless extension candidates. Maximal degree in co-relation 2959. Up to 207 conditions per place. [2022-07-19 21:46:00,739 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 71 selfloop transitions, 30 changer transitions 1/233 dead transitions. [2022-07-19 21:46:00,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 1184 flow [2022-07-19 21:46:00,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:46:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:46:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1235 transitions. [2022-07-19 21:46:00,743 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8624301675977654 [2022-07-19 21:46:00,743 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1235 transitions. [2022-07-19 21:46:00,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1235 transitions. [2022-07-19 21:46:00,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:00,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1235 transitions. [2022-07-19 21:46:00,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 154.375) internal successors, (1235), 8 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,750 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,750 INFO L186 Difference]: Start difference. First operand has 186 places, 181 transitions, 699 flow. Second operand 8 states and 1235 transitions. [2022-07-19 21:46:00,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 1184 flow [2022-07-19 21:46:00,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 233 transitions, 1138 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-19 21:46:00,762 INFO L242 Difference]: Finished difference. Result has 193 places, 189 transitions, 825 flow [2022-07-19 21:46:00,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=825, PETRI_PLACES=193, PETRI_TRANSITIONS=189} [2022-07-19 21:46:00,763 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 33 predicate places. [2022-07-19 21:46:00,763 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 189 transitions, 825 flow [2022-07-19 21:46:00,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.85714285714286) internal successors, (1028), 7 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,764 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:00,764 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:00,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 21:46:00,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:00,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2068674478, now seen corresponding path program 1 times [2022-07-19 21:46:00,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:00,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2938471] [2022-07-19 21:46:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:00,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:00,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:00,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2938471] [2022-07-19 21:46:00,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2938471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:46:00,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:46:00,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 21:46:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178493448] [2022-07-19 21:46:00,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:00,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 21:46:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:00,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 21:46:00,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-19 21:46:00,866 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 179 [2022-07-19 21:46:00,872 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 189 transitions, 825 flow. Second operand has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:00,873 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:00,873 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 179 [2022-07-19 21:46:00,873 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:01,051 INFO L129 PetriNetUnfolder]: 108/1092 cut-off events. [2022-07-19 21:46:01,051 INFO L130 PetriNetUnfolder]: For 1018/1051 co-relation queries the response was YES. [2022-07-19 21:46:01,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1864 conditions, 1092 events. 108/1092 cut-off events. For 1018/1051 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7584 event pairs, 35 based on Foata normal form. 9/1023 useless extension candidates. Maximal degree in co-relation 1842. Up to 145 conditions per place. [2022-07-19 21:46:01,062 INFO L132 encePairwiseOnDemand]: 171/179 looper letters, 33 selfloop transitions, 7 changer transitions 0/193 dead transitions. [2022-07-19 21:46:01,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 193 transitions, 913 flow [2022-07-19 21:46:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 21:46:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-19 21:46:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1057 transitions. [2022-07-19 21:46:01,065 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7381284916201117 [2022-07-19 21:46:01,065 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1057 transitions. [2022-07-19 21:46:01,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1057 transitions. [2022-07-19 21:46:01,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:01,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1057 transitions. [2022-07-19 21:46:01,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:01,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:01,071 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:01,071 INFO L186 Difference]: Start difference. First operand has 193 places, 189 transitions, 825 flow. Second operand 8 states and 1057 transitions. [2022-07-19 21:46:01,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 193 transitions, 913 flow [2022-07-19 21:46:01,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 193 transitions, 881 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-07-19 21:46:01,081 INFO L242 Difference]: Finished difference. Result has 198 places, 190 transitions, 815 flow [2022-07-19 21:46:01,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=815, PETRI_PLACES=198, PETRI_TRANSITIONS=190} [2022-07-19 21:46:01,082 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 38 predicate places. [2022-07-19 21:46:01,083 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 190 transitions, 815 flow [2022-07-19 21:46:01,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.75) internal successors, (1046), 8 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:01,083 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:01,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:01,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 21:46:01,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:01,085 INFO L85 PathProgramCache]: Analyzing trace with hash -721032061, now seen corresponding path program 1 times [2022-07-19 21:46:01,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:01,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014004379] [2022-07-19 21:46:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:01,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:01,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:01,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014004379] [2022-07-19 21:46:01,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014004379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:01,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141467046] [2022-07-19 21:46:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:01,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:01,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:01,331 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) [2022-07-19 21:46:01,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 21:46:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 21:46:01,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:01,872 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 [2022-07-19 21:46:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:01,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:01,982 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:46:01,982 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 11 [2022-07-19 21:46:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:46:02,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141467046] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:02,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:46:02,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2022-07-19 21:46:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231039366] [2022-07-19 21:46:02,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:02,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:46:02,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:46:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:46:02,081 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-19 21:46:02,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 190 transitions, 815 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:02,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:02,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-19 21:46:02,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:02,821 INFO L129 PetriNetUnfolder]: 1161/4104 cut-off events. [2022-07-19 21:46:02,821 INFO L130 PetriNetUnfolder]: For 2401/2464 co-relation queries the response was YES. [2022-07-19 21:46:02,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7549 conditions, 4104 events. 1161/4104 cut-off events. For 2401/2464 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 36225 event pairs, 340 based on Foata normal form. 22/3877 useless extension candidates. Maximal degree in co-relation 7526. Up to 998 conditions per place. [2022-07-19 21:46:02,857 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 90 selfloop transitions, 18 changer transitions 4/257 dead transitions. [2022-07-19 21:46:02,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 257 transitions, 1179 flow [2022-07-19 21:46:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 21:46:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-19 21:46:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1647 transitions. [2022-07-19 21:46:02,862 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7077782552642888 [2022-07-19 21:46:02,862 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1647 transitions. [2022-07-19 21:46:02,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1647 transitions. [2022-07-19 21:46:02,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:02,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1647 transitions. [2022-07-19 21:46:02,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 126.6923076923077) internal successors, (1647), 13 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:02,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 179.0) internal successors, (2506), 14 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:02,871 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 179.0) internal successors, (2506), 14 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:02,871 INFO L186 Difference]: Start difference. First operand has 198 places, 190 transitions, 815 flow. Second operand 13 states and 1647 transitions. [2022-07-19 21:46:02,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 257 transitions, 1179 flow [2022-07-19 21:46:02,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 257 transitions, 1167 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:46:02,889 INFO L242 Difference]: Finished difference. Result has 213 places, 206 transitions, 917 flow [2022-07-19 21:46:02,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=917, PETRI_PLACES=213, PETRI_TRANSITIONS=206} [2022-07-19 21:46:02,890 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 53 predicate places. [2022-07-19 21:46:02,890 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 206 transitions, 917 flow [2022-07-19 21:46:02,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:02,891 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:02,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:02,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:03,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:03,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash -278354083, now seen corresponding path program 1 times [2022-07-19 21:46:03,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:03,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131154140] [2022-07-19 21:46:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:03,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:03,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:03,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131154140] [2022-07-19 21:46:03,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131154140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:03,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864107045] [2022-07-19 21:46:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:03,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:03,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:03,291 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) [2022-07-19 21:46:03,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 21:46:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:03,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 21:46:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:04,147 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-19 21:46:04,148 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2022-07-19 21:46:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:04,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:04,515 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:46:04,515 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-07-19 21:46:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:05,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864107045] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:05,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:05,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 19] total 38 [2022-07-19 21:46:05,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152626473] [2022-07-19 21:46:05,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:05,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 21:46:05,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 21:46:05,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 21:46:05,683 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 179 [2022-07-19 21:46:05,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 206 transitions, 917 flow. Second operand has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:05,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:05,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 179 [2022-07-19 21:46:05,686 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:12,735 INFO L129 PetriNetUnfolder]: 6270/13936 cut-off events. [2022-07-19 21:46:12,736 INFO L130 PetriNetUnfolder]: For 22916/22944 co-relation queries the response was YES. [2022-07-19 21:46:12,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36233 conditions, 13936 events. 6270/13936 cut-off events. For 22916/22944 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 129940 event pairs, 505 based on Foata normal form. 23/13268 useless extension candidates. Maximal degree in co-relation 36201. Up to 3004 conditions per place. [2022-07-19 21:46:12,936 INFO L132 encePairwiseOnDemand]: 133/179 looper letters, 515 selfloop transitions, 112 changer transitions 284/978 dead transitions. [2022-07-19 21:46:12,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 978 transitions, 5891 flow [2022-07-19 21:46:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-19 21:46:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2022-07-19 21:46:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 7546 transitions. [2022-07-19 21:46:12,959 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.46325741297808337 [2022-07-19 21:46:12,959 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 7546 transitions. [2022-07-19 21:46:12,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 7546 transitions. [2022-07-19 21:46:12,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:12,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 7546 transitions. [2022-07-19 21:46:12,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 82.92307692307692) internal successors, (7546), 91 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:13,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:13,025 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 179.0) internal successors, (16468), 92 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:13,026 INFO L186 Difference]: Start difference. First operand has 213 places, 206 transitions, 917 flow. Second operand 91 states and 7546 transitions. [2022-07-19 21:46:13,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 978 transitions, 5891 flow [2022-07-19 21:46:13,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 978 transitions, 5881 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-07-19 21:46:13,102 INFO L242 Difference]: Finished difference. Result has 353 places, 283 transitions, 1794 flow [2022-07-19 21:46:13,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=1794, PETRI_PLACES=353, PETRI_TRANSITIONS=283} [2022-07-19 21:46:13,103 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 193 predicate places. [2022-07-19 21:46:13,103 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 283 transitions, 1794 flow [2022-07-19 21:46:13,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 79.10526315789474) internal successors, (3006), 38 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:13,104 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:13,105 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:13,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:13,319 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,SelfDestructingSolverStorable9 [2022-07-19 21:46:13,319 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1230727617, now seen corresponding path program 2 times [2022-07-19 21:46:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:13,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296205824] [2022-07-19 21:46:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:13,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:13,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:13,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296205824] [2022-07-19 21:46:13,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296205824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:13,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758591160] [2022-07-19 21:46:13,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:46:13,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:13,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:13,590 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) [2022-07-19 21:46:13,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 21:46:13,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:46:13,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 21:46:13,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:14,026 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 [2022-07-19 21:46:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:14,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:14,139 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:46:14,139 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 11 [2022-07-19 21:46:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:46:14,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758591160] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:14,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:46:14,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 17 [2022-07-19 21:46:14,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358001264] [2022-07-19 21:46:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:46:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:46:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-07-19 21:46:14,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-19 21:46:14,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 283 transitions, 1794 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:14,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:14,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-19 21:46:14,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:15,561 INFO L129 PetriNetUnfolder]: 1913/6501 cut-off events. [2022-07-19 21:46:15,561 INFO L130 PetriNetUnfolder]: For 18173/18594 co-relation queries the response was YES. [2022-07-19 21:46:15,626 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19543 conditions, 6501 events. 1913/6501 cut-off events. For 18173/18594 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 63645 event pairs, 342 based on Foata normal form. 42/6314 useless extension candidates. Maximal degree in co-relation 19458. Up to 1115 conditions per place. [2022-07-19 21:46:15,655 INFO L132 encePairwiseOnDemand]: 166/179 looper letters, 130 selfloop transitions, 64 changer transitions 9/395 dead transitions. [2022-07-19 21:46:15,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 395 transitions, 2731 flow [2022-07-19 21:46:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:46:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:46:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1926 transitions. [2022-07-19 21:46:15,659 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.71731843575419 [2022-07-19 21:46:15,659 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1926 transitions. [2022-07-19 21:46:15,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1926 transitions. [2022-07-19 21:46:15,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:15,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1926 transitions. [2022-07-19 21:46:15,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.4) internal successors, (1926), 15 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:15,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:15,667 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:15,668 INFO L186 Difference]: Start difference. First operand has 353 places, 283 transitions, 1794 flow. Second operand 15 states and 1926 transitions. [2022-07-19 21:46:15,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 395 transitions, 2731 flow [2022-07-19 21:46:15,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 395 transitions, 2481 flow, removed 98 selfloop flow, removed 35 redundant places. [2022-07-19 21:46:15,777 INFO L242 Difference]: Finished difference. Result has 295 places, 318 transitions, 2031 flow [2022-07-19 21:46:15,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2031, PETRI_PLACES=295, PETRI_TRANSITIONS=318} [2022-07-19 21:46:15,779 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 135 predicate places. [2022-07-19 21:46:15,779 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 318 transitions, 2031 flow [2022-07-19 21:46:15,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:15,779 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:15,779 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:15,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:15,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:15,996 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1485343311, now seen corresponding path program 3 times [2022-07-19 21:46:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:15,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745208145] [2022-07-19 21:46:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:15,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:16,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:16,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745208145] [2022-07-19 21:46:16,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745208145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:16,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803136560] [2022-07-19 21:46:16,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:46:16,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:16,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:16,176 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) [2022-07-19 21:46:16,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 21:46:16,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:46:16,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:16,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 21:46:16,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:16,792 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 [2022-07-19 21:46:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:16,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:17,040 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:46:17,040 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 11 [2022-07-19 21:46:17,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:46:17,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803136560] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:17,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:46:17,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2022-07-19 21:46:17,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744747927] [2022-07-19 21:46:17,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:17,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:46:17,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:17,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:46:17,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:46:17,147 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-19 21:46:17,148 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 318 transitions, 2031 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:17,148 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:17,149 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-19 21:46:17,149 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:18,386 INFO L129 PetriNetUnfolder]: 2036/6945 cut-off events. [2022-07-19 21:46:18,386 INFO L130 PetriNetUnfolder]: For 15185/15440 co-relation queries the response was YES. [2022-07-19 21:46:18,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21065 conditions, 6945 events. 2036/6945 cut-off events. For 15185/15440 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 69067 event pairs, 444 based on Foata normal form. 51/6730 useless extension candidates. Maximal degree in co-relation 20997. Up to 1614 conditions per place. [2022-07-19 21:46:18,463 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 133 selfloop transitions, 66 changer transitions 4/395 dead transitions. [2022-07-19 21:46:18,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 395 transitions, 2847 flow [2022-07-19 21:46:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 21:46:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-19 21:46:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1899 transitions. [2022-07-19 21:46:18,466 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7072625698324022 [2022-07-19 21:46:18,467 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1899 transitions. [2022-07-19 21:46:18,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1899 transitions. [2022-07-19 21:46:18,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:18,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1899 transitions. [2022-07-19 21:46:18,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.6) internal successors, (1899), 15 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:18,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:18,547 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 179.0) internal successors, (2864), 16 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:18,547 INFO L186 Difference]: Start difference. First operand has 295 places, 318 transitions, 2031 flow. Second operand 15 states and 1899 transitions. [2022-07-19 21:46:18,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 395 transitions, 2847 flow [2022-07-19 21:46:18,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 395 transitions, 2746 flow, removed 43 selfloop flow, removed 3 redundant places. [2022-07-19 21:46:18,657 INFO L242 Difference]: Finished difference. Result has 311 places, 341 transitions, 2331 flow [2022-07-19 21:46:18,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2331, PETRI_PLACES=311, PETRI_TRANSITIONS=341} [2022-07-19 21:46:18,660 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 151 predicate places. [2022-07-19 21:46:18,660 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 341 transitions, 2331 flow [2022-07-19 21:46:18,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:18,660 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:18,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:18,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:18,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:18,885 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:18,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1461858045, now seen corresponding path program 4 times [2022-07-19 21:46:18,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:18,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812477360] [2022-07-19 21:46:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:18,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:19,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812477360] [2022-07-19 21:46:19,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812477360] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534464010] [2022-07-19 21:46:19,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:46:19,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:19,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:19,088 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) [2022-07-19 21:46:19,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 21:46:19,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:46:19,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:19,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 21:46:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:19,561 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 [2022-07-19 21:46:19,724 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 [2022-07-19 21:46:19,806 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 [2022-07-19 21:46:19,899 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 [2022-07-19 21:46:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:19,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:20,300 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:46:20,300 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 55 treesize of output 44 [2022-07-19 21:46:20,310 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:46:20,310 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 94 treesize of output 85 [2022-07-19 21:46:20,316 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:46:20,316 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 78 treesize of output 54 [2022-07-19 21:46:20,322 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:46:20,322 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 32 treesize of output 20 [2022-07-19 21:46:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:20,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534464010] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:20,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:20,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 31 [2022-07-19 21:46:20,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015611277] [2022-07-19 21:46:20,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:20,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 21:46:20,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 21:46:20,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=677, Unknown=43, NotChecked=0, Total=930 [2022-07-19 21:46:20,409 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2022-07-19 21:46:20,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 341 transitions, 2331 flow. Second operand has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:20,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:20,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2022-07-19 21:46:20,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:22,359 INFO L129 PetriNetUnfolder]: 2155/7266 cut-off events. [2022-07-19 21:46:22,360 INFO L130 PetriNetUnfolder]: For 18546/18807 co-relation queries the response was YES. [2022-07-19 21:46:22,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23024 conditions, 7266 events. 2155/7266 cut-off events. For 18546/18807 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 72920 event pairs, 445 based on Foata normal form. 50/7054 useless extension candidates. Maximal degree in co-relation 22951. Up to 1637 conditions per place. [2022-07-19 21:46:22,437 INFO L132 encePairwiseOnDemand]: 155/179 looper letters, 168 selfloop transitions, 102 changer transitions 4/444 dead transitions. [2022-07-19 21:46:22,437 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 444 transitions, 3497 flow [2022-07-19 21:46:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 21:46:22,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-19 21:46:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3183 transitions. [2022-07-19 21:46:22,442 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5736168679041269 [2022-07-19 21:46:22,443 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3183 transitions. [2022-07-19 21:46:22,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3183 transitions. [2022-07-19 21:46:22,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:22,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3183 transitions. [2022-07-19 21:46:22,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 102.6774193548387) internal successors, (3183), 31 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:22,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:22,457 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:22,457 INFO L186 Difference]: Start difference. First operand has 311 places, 341 transitions, 2331 flow. Second operand 31 states and 3183 transitions. [2022-07-19 21:46:22,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 444 transitions, 3497 flow [2022-07-19 21:46:22,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 444 transitions, 3379 flow, removed 39 selfloop flow, removed 5 redundant places. [2022-07-19 21:46:22,619 INFO L242 Difference]: Finished difference. Result has 343 places, 378 transitions, 2903 flow [2022-07-19 21:46:22,619 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2239, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2903, PETRI_PLACES=343, PETRI_TRANSITIONS=378} [2022-07-19 21:46:22,620 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 183 predicate places. [2022-07-19 21:46:22,621 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 378 transitions, 2903 flow [2022-07-19 21:46:22,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:22,622 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:22,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:22,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:22,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 21:46:22,835 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash -539667915, now seen corresponding path program 5 times [2022-07-19 21:46:22,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:22,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50897817] [2022-07-19 21:46:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:22,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:23,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50897817] [2022-07-19 21:46:23,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50897817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217256567] [2022-07-19 21:46:23,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:46:23,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:23,048 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) [2022-07-19 21:46:23,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 21:46:23,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:46:23,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 21:46:23,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:23,560 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 [2022-07-19 21:46:23,754 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 [2022-07-19 21:46:23,855 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 [2022-07-19 21:46:23,943 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 [2022-07-19 21:46:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:23,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:24,255 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:46:24,255 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 55 treesize of output 44 [2022-07-19 21:46:24,266 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:46:24,267 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 94 treesize of output 85 [2022-07-19 21:46:24,272 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:46:24,272 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 78 treesize of output 54 [2022-07-19 21:46:24,277 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-19 21:46:24,277 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 32 treesize of output 20 [2022-07-19 21:46:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:46:24,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217256567] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:24,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:24,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 15] total 31 [2022-07-19 21:46:24,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044710084] [2022-07-19 21:46:24,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:24,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 21:46:24,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:24,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 21:46:24,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=674, Unknown=46, NotChecked=0, Total=930 [2022-07-19 21:46:24,349 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 179 [2022-07-19 21:46:24,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 378 transitions, 2903 flow. Second operand has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:24,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:24,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 179 [2022-07-19 21:46:24,351 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:26,296 INFO L129 PetriNetUnfolder]: 2174/7381 cut-off events. [2022-07-19 21:46:26,296 INFO L130 PetriNetUnfolder]: For 22812/23134 co-relation queries the response was YES. [2022-07-19 21:46:26,343 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24821 conditions, 7381 events. 2174/7381 cut-off events. For 22812/23134 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 74601 event pairs, 460 based on Foata normal form. 58/7161 useless extension candidates. Maximal degree in co-relation 24741. Up to 1718 conditions per place. [2022-07-19 21:46:26,363 INFO L132 encePairwiseOnDemand]: 155/179 looper letters, 174 selfloop transitions, 96 changer transitions 4/444 dead transitions. [2022-07-19 21:46:26,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 444 transitions, 3787 flow [2022-07-19 21:46:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 21:46:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-19 21:46:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2971 transitions. [2022-07-19 21:46:26,368 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5723367366596032 [2022-07-19 21:46:26,368 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2971 transitions. [2022-07-19 21:46:26,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2971 transitions. [2022-07-19 21:46:26,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:26,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2971 transitions. [2022-07-19 21:46:26,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.44827586206897) internal successors, (2971), 29 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:26,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:26,380 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 179.0) internal successors, (5370), 30 states have internal predecessors, (5370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:26,380 INFO L186 Difference]: Start difference. First operand has 343 places, 378 transitions, 2903 flow. Second operand 29 states and 2971 transitions. [2022-07-19 21:46:26,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 444 transitions, 3787 flow [2022-07-19 21:46:26,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 444 transitions, 3499 flow, removed 116 selfloop flow, removed 13 redundant places. [2022-07-19 21:46:26,634 INFO L242 Difference]: Finished difference. Result has 360 places, 385 transitions, 2929 flow [2022-07-19 21:46:26,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2636, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2929, PETRI_PLACES=360, PETRI_TRANSITIONS=385} [2022-07-19 21:46:26,635 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 200 predicate places. [2022-07-19 21:46:26,635 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 385 transitions, 2929 flow [2022-07-19 21:46:26,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 101.12903225806451) internal successors, (3135), 31 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:26,636 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:26,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:26,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:26,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:26,837 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:26,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:26,838 INFO L85 PathProgramCache]: Analyzing trace with hash -729450221, now seen corresponding path program 6 times [2022-07-19 21:46:26,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:26,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272156018] [2022-07-19 21:46:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:26,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:27,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:27,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272156018] [2022-07-19 21:46:27,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272156018] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:27,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323215356] [2022-07-19 21:46:27,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:46:27,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:27,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:27,054 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) [2022-07-19 21:46:27,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 21:46:27,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 21:46:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 21:46:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:27,387 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 [2022-07-19 21:46:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:27,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:27,481 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-19 21:46:27,481 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 11 [2022-07-19 21:46:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 21:46:27,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323215356] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:27,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 21:46:27,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 15] total 16 [2022-07-19 21:46:27,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625098094] [2022-07-19 21:46:27,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:46:27,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 21:46:27,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:27,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 21:46:27,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-07-19 21:46:27,563 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 179 [2022-07-19 21:46:27,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 385 transitions, 2929 flow. Second operand has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:27,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:27,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 179 [2022-07-19 21:46:27,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:28,956 INFO L129 PetriNetUnfolder]: 2208/7622 cut-off events. [2022-07-19 21:46:28,956 INFO L130 PetriNetUnfolder]: For 25463/25771 co-relation queries the response was YES. [2022-07-19 21:46:29,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25694 conditions, 7622 events. 2208/7622 cut-off events. For 25463/25771 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 78191 event pairs, 470 based on Foata normal form. 60/7402 useless extension candidates. Maximal degree in co-relation 25611. Up to 1922 conditions per place. [2022-07-19 21:46:29,021 INFO L132 encePairwiseOnDemand]: 167/179 looper letters, 171 selfloop transitions, 70 changer transitions 5/438 dead transitions. [2022-07-19 21:46:29,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 438 transitions, 3675 flow [2022-07-19 21:46:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 21:46:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-07-19 21:46:29,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2250 transitions. [2022-07-19 21:46:29,025 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6983240223463687 [2022-07-19 21:46:29,025 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2250 transitions. [2022-07-19 21:46:29,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2250 transitions. [2022-07-19 21:46:29,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:29,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2250 transitions. [2022-07-19 21:46:29,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.0) internal successors, (2250), 18 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) [2022-07-19 21:46:29,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:29,033 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 179.0) internal successors, (3401), 19 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:29,033 INFO L186 Difference]: Start difference. First operand has 360 places, 385 transitions, 2929 flow. Second operand 18 states and 2250 transitions. [2022-07-19 21:46:29,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 438 transitions, 3675 flow [2022-07-19 21:46:29,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 438 transitions, 3511 flow, removed 27 selfloop flow, removed 20 redundant places. [2022-07-19 21:46:29,167 INFO L242 Difference]: Finished difference. Result has 358 places, 389 transitions, 2970 flow [2022-07-19 21:46:29,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2970, PETRI_PLACES=358, PETRI_TRANSITIONS=389} [2022-07-19 21:46:29,168 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 198 predicate places. [2022-07-19 21:46:29,168 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 389 transitions, 2970 flow [2022-07-19 21:46:29,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 122.33333333333333) internal successors, (1101), 9 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:29,168 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:29,168 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:29,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:29,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:29,383 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1124290073, now seen corresponding path program 7 times [2022-07-19 21:46:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:29,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170175241] [2022-07-19 21:46:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:29,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170175241] [2022-07-19 21:46:29,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170175241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126641133] [2022-07-19 21:46:29,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 21:46:29,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:29,760 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) [2022-07-19 21:46:29,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 21:46:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:29,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 21:46:29,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:29,870 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 [2022-07-19 21:46:29,966 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 21:46:29,967 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 [2022-07-19 21:46:30,129 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 [2022-07-19 21:46:30,213 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 [2022-07-19 21:46:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:30,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:30,319 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_282 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_282) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-07-19 21:46:30,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:46:30,336 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 46 treesize of output 38 [2022-07-19 21:46:30,339 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 13 treesize of output 7 [2022-07-19 21:46:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:30,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126641133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:30,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:30,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 26 [2022-07-19 21:46:30,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274334618] [2022-07-19 21:46:30,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:30,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 21:46:30,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 21:46:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=519, Unknown=1, NotChecked=46, Total=650 [2022-07-19 21:46:30,649 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 179 [2022-07-19 21:46:30,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 389 transitions, 2970 flow. Second operand has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:30,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:30,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 179 [2022-07-19 21:46:30,651 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:32,773 INFO L129 PetriNetUnfolder]: 2521/8565 cut-off events. [2022-07-19 21:46:32,774 INFO L130 PetriNetUnfolder]: For 31700/32097 co-relation queries the response was YES. [2022-07-19 21:46:32,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29794 conditions, 8565 events. 2521/8565 cut-off events. For 31700/32097 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 90009 event pairs, 482 based on Foata normal form. 59/8306 useless extension candidates. Maximal degree in co-relation 29709. Up to 1687 conditions per place. [2022-07-19 21:46:32,844 INFO L132 encePairwiseOnDemand]: 153/179 looper letters, 191 selfloop transitions, 131 changer transitions 9/509 dead transitions. [2022-07-19 21:46:32,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 509 transitions, 4574 flow [2022-07-19 21:46:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 21:46:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-19 21:46:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2601 transitions. [2022-07-19 21:46:32,847 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6054469273743017 [2022-07-19 21:46:32,847 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2601 transitions. [2022-07-19 21:46:32,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2601 transitions. [2022-07-19 21:46:32,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:32,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2601 transitions. [2022-07-19 21:46:32,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 108.375) internal successors, (2601), 24 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:32,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:32,855 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:32,855 INFO L186 Difference]: Start difference. First operand has 358 places, 389 transitions, 2970 flow. Second operand 24 states and 2601 transitions. [2022-07-19 21:46:32,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 509 transitions, 4574 flow [2022-07-19 21:46:33,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 509 transitions, 4328 flow, removed 30 selfloop flow, removed 14 redundant places. [2022-07-19 21:46:33,012 INFO L242 Difference]: Finished difference. Result has 375 places, 436 transitions, 3726 flow [2022-07-19 21:46:33,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3726, PETRI_PLACES=375, PETRI_TRANSITIONS=436} [2022-07-19 21:46:33,013 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 215 predicate places. [2022-07-19 21:46:33,013 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 436 transitions, 3726 flow [2022-07-19 21:46:33,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 104.46153846153847) internal successors, (2716), 26 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:33,014 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:33,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:33,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 21:46:33,231 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,SelfDestructingSolverStorable15 [2022-07-19 21:46:33,231 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash -574941255, now seen corresponding path program 8 times [2022-07-19 21:46:33,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:33,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99374976] [2022-07-19 21:46:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:33,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:33,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99374976] [2022-07-19 21:46:33,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99374976] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290322836] [2022-07-19 21:46:33,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:46:33,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:33,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:33,508 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) [2022-07-19 21:46:33,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 21:46:33,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:46:33,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:33,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 21:46:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:34,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 21:46:34,031 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 14 treesize of output 16 [2022-07-19 21:46:34,087 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 [2022-07-19 21:46:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:34,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:34,163 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_307 (Array Int Int))) (= c_~x1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_307) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-07-19 21:46:34,175 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_307 (Array Int Int))) (= |c_thread1Thread1of1ForFork1_#t~mem1#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_307) c_~f~0.base) (+ (* c_~x2~0 4) c_~f~0.offset)))) is different from false [2022-07-19 21:46:34,181 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 21:46:34,181 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 46 treesize of output 38 [2022-07-19 21:46:34,184 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 13 treesize of output 7 [2022-07-19 21:46:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 21:46:34,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290322836] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:34,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:34,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 34 [2022-07-19 21:46:34,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16479198] [2022-07-19 21:46:34,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:34,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 21:46:34,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 21:46:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=870, Unknown=2, NotChecked=122, Total=1122 [2022-07-19 21:46:34,596 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 179 [2022-07-19 21:46:34,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 436 transitions, 3726 flow. Second operand has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:34,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:34,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 179 [2022-07-19 21:46:34,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:37,025 INFO L129 PetriNetUnfolder]: 2670/9247 cut-off events. [2022-07-19 21:46:37,025 INFO L130 PetriNetUnfolder]: For 43687/44292 co-relation queries the response was YES. [2022-07-19 21:46:37,108 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34911 conditions, 9247 events. 2670/9247 cut-off events. For 43687/44292 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 99187 event pairs, 448 based on Foata normal form. 81/8974 useless extension candidates. Maximal degree in co-relation 34818. Up to 1922 conditions per place. [2022-07-19 21:46:37,138 INFO L132 encePairwiseOnDemand]: 152/179 looper letters, 207 selfloop transitions, 132 changer transitions 9/525 dead transitions. [2022-07-19 21:46:37,139 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 525 transitions, 5157 flow [2022-07-19 21:46:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 21:46:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-07-19 21:46:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2466 transitions. [2022-07-19 21:46:37,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.598979839689094 [2022-07-19 21:46:37,142 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2466 transitions. [2022-07-19 21:46:37,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2466 transitions. [2022-07-19 21:46:37,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:37,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2466 transitions. [2022-07-19 21:46:37,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 107.21739130434783) internal successors, (2466), 23 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:37,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:37,266 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:37,266 INFO L186 Difference]: Start difference. First operand has 375 places, 436 transitions, 3726 flow. Second operand 23 states and 2466 transitions. [2022-07-19 21:46:37,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 525 transitions, 5157 flow [2022-07-19 21:46:37,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 525 transitions, 4961 flow, removed 68 selfloop flow, removed 11 redundant places. [2022-07-19 21:46:37,487 INFO L242 Difference]: Finished difference. Result has 393 places, 458 transitions, 4183 flow [2022-07-19 21:46:37,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4183, PETRI_PLACES=393, PETRI_TRANSITIONS=458} [2022-07-19 21:46:37,488 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 233 predicate places. [2022-07-19 21:46:37,488 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 458 transitions, 4183 flow [2022-07-19 21:46:37,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 103.52941176470588) internal successors, (3520), 34 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:37,489 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:37,489 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:37,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:37,689 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,SelfDestructingSolverStorable16 [2022-07-19 21:46:37,689 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:37,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:37,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1350777330, now seen corresponding path program 2 times [2022-07-19 21:46:37,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:37,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884445014] [2022-07-19 21:46:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:37,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:46:37,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884445014] [2022-07-19 21:46:37,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884445014] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:37,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849818277] [2022-07-19 21:46:37,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 21:46:37,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:37,840 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) [2022-07-19 21:46:37,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 21:46:38,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 21:46:38,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:38,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:46:38,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:46:38,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:46:38,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849818277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:38,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:38,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-19 21:46:38,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292127797] [2022-07-19 21:46:38,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:38,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:46:38,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:46:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:46:38,566 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-19 21:46:38,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 458 transitions, 4183 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:38,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:38,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-19 21:46:38,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:41,388 INFO L129 PetriNetUnfolder]: 2745/10572 cut-off events. [2022-07-19 21:46:41,388 INFO L130 PetriNetUnfolder]: For 51207/51655 co-relation queries the response was YES. [2022-07-19 21:46:41,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40411 conditions, 10572 events. 2745/10572 cut-off events. For 51207/51655 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 117626 event pairs, 747 based on Foata normal form. 86/9935 useless extension candidates. Maximal degree in co-relation 40310. Up to 1156 conditions per place. [2022-07-19 21:46:41,528 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 138 selfloop transitions, 108 changer transitions 0/619 dead transitions. [2022-07-19 21:46:41,528 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 619 transitions, 5810 flow [2022-07-19 21:46:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 21:46:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-19 21:46:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4010 transitions. [2022-07-19 21:46:41,532 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8297123939582041 [2022-07-19 21:46:41,533 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4010 transitions. [2022-07-19 21:46:41,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4010 transitions. [2022-07-19 21:46:41,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:41,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4010 transitions. [2022-07-19 21:46:41,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 148.5185185185185) internal successors, (4010), 27 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:41,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:41,544 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 179.0) internal successors, (5012), 28 states have internal predecessors, (5012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:41,544 INFO L186 Difference]: Start difference. First operand has 393 places, 458 transitions, 4183 flow. Second operand 27 states and 4010 transitions. [2022-07-19 21:46:41,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 619 transitions, 5810 flow [2022-07-19 21:46:41,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 619 transitions, 5563 flow, removed 69 selfloop flow, removed 13 redundant places. [2022-07-19 21:46:41,878 INFO L242 Difference]: Finished difference. Result has 422 places, 542 transitions, 5114 flow [2022-07-19 21:46:41,878 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5114, PETRI_PLACES=422, PETRI_TRANSITIONS=542} [2022-07-19 21:46:41,879 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 262 predicate places. [2022-07-19 21:46:41,879 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 542 transitions, 5114 flow [2022-07-19 21:46:41,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:41,879 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:41,880 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:41,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 21:46:42,091 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,SelfDestructingSolverStorable17 [2022-07-19 21:46:42,091 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash -379462702, now seen corresponding path program 3 times [2022-07-19 21:46:42,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:42,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196381900] [2022-07-19 21:46:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:46:42,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:42,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196381900] [2022-07-19 21:46:42,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196381900] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:42,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586647840] [2022-07-19 21:46:42,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 21:46:42,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:42,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:42,368 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) [2022-07-19 21:46:42,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 21:46:42,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 21:46:42,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:46:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:46:42,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:46:43,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586647840] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:43,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:43,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-19 21:46:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523175591] [2022-07-19 21:46:43,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:43,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:46:43,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:46:43,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:46:43,148 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-19 21:46:43,149 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 542 transitions, 5114 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:43,149 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:43,150 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-19 21:46:43,150 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:50,430 INFO L129 PetriNetUnfolder]: 4446/17008 cut-off events. [2022-07-19 21:46:50,430 INFO L130 PetriNetUnfolder]: For 89276/89966 co-relation queries the response was YES. [2022-07-19 21:46:50,637 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69543 conditions, 17008 events. 4446/17008 cut-off events. For 89276/89966 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 207077 event pairs, 1188 based on Foata normal form. 117/15948 useless extension candidates. Maximal degree in co-relation 69426. Up to 1762 conditions per place. [2022-07-19 21:46:50,694 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 226 selfloop transitions, 287 changer transitions 2/888 dead transitions. [2022-07-19 21:46:50,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 888 transitions, 9173 flow [2022-07-19 21:46:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-19 21:46:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-07-19 21:46:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 10511 transitions. [2022-07-19 21:46:50,703 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8270516956487528 [2022-07-19 21:46:50,703 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 10511 transitions. [2022-07-19 21:46:50,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 10511 transitions. [2022-07-19 21:46:50,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:46:50,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 10511 transitions. [2022-07-19 21:46:50,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 148.04225352112675) internal successors, (10511), 71 states have internal predecessors, (10511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:50,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 179.0) internal successors, (12888), 72 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:50,729 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 179.0) internal successors, (12888), 72 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:50,729 INFO L186 Difference]: Start difference. First operand has 422 places, 542 transitions, 5114 flow. Second operand 71 states and 10511 transitions. [2022-07-19 21:46:50,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 888 transitions, 9173 flow [2022-07-19 21:46:51,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 888 transitions, 8887 flow, removed 125 selfloop flow, removed 1 redundant places. [2022-07-19 21:46:51,518 INFO L242 Difference]: Finished difference. Result has 515 places, 730 transitions, 7783 flow [2022-07-19 21:46:51,519 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=4968, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=7783, PETRI_PLACES=515, PETRI_TRANSITIONS=730} [2022-07-19 21:46:51,519 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 355 predicate places. [2022-07-19 21:46:51,519 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 730 transitions, 7783 flow [2022-07-19 21:46:51,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:51,519 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:46:51,520 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:46:51,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-19 21:46:51,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:51,720 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:46:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:46:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2070868552, now seen corresponding path program 4 times [2022-07-19 21:46:51,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:46:51,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907089037] [2022-07-19 21:46:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:46:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:46:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:46:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:46:51,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:46:51,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907089037] [2022-07-19 21:46:51,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907089037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:46:51,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403906217] [2022-07-19 21:46:51,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 21:46:51,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:46:51,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:46:51,884 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) [2022-07-19 21:46:51,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 21:46:52,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 21:46:52,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:46:52,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:46:52,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:46:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:46:52,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:46:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:46:52,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403906217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:46:52,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:46:52,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-19 21:46:52,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300544325] [2022-07-19 21:46:52,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:46:52,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 21:46:52,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:46:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 21:46:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:46:52,845 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-19 21:46:52,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 730 transitions, 7783 flow. Second operand has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:46:52,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:46:52,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-19 21:46:52,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:46:59,726 INFO L129 PetriNetUnfolder]: 5593/22143 cut-off events. [2022-07-19 21:46:59,726 INFO L130 PetriNetUnfolder]: For 149062/149971 co-relation queries the response was YES. [2022-07-19 21:47:00,044 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95757 conditions, 22143 events. 5593/22143 cut-off events. For 149062/149971 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 284848 event pairs, 1666 based on Foata normal form. 163/20772 useless extension candidates. Maximal degree in co-relation 95617. Up to 2209 conditions per place. [2022-07-19 21:47:00,118 INFO L132 encePairwiseOnDemand]: 163/179 looper letters, 275 selfloop transitions, 406 changer transitions 0/1054 dead transitions. [2022-07-19 21:47:00,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1054 transitions, 12905 flow [2022-07-19 21:47:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 21:47:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-07-19 21:47:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5835 transitions. [2022-07-19 21:47:00,122 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8358401375161152 [2022-07-19 21:47:00,122 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5835 transitions. [2022-07-19 21:47:00,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5835 transitions. [2022-07-19 21:47:00,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:00,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5835 transitions. [2022-07-19 21:47:00,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 149.6153846153846) internal successors, (5835), 39 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:00,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:00,136 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 179.0) internal successors, (7160), 40 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:00,137 INFO L186 Difference]: Start difference. First operand has 515 places, 730 transitions, 7783 flow. Second operand 39 states and 5835 transitions. [2022-07-19 21:47:00,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1054 transitions, 12905 flow [2022-07-19 21:47:01,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 1054 transitions, 11921 flow, removed 446 selfloop flow, removed 3 redundant places. [2022-07-19 21:47:01,691 INFO L242 Difference]: Finished difference. Result has 568 places, 897 transitions, 10446 flow [2022-07-19 21:47:01,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=7127, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10446, PETRI_PLACES=568, PETRI_TRANSITIONS=897} [2022-07-19 21:47:01,692 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 408 predicate places. [2022-07-19 21:47:01,692 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 897 transitions, 10446 flow [2022-07-19 21:47:01,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 144.64) internal successors, (3616), 25 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:01,693 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:01,693 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:47:01,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 21:47:01,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:01,907 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1560836330, now seen corresponding path program 5 times [2022-07-19 21:47:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:01,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694679748] [2022-07-19 21:47:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:01,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:47:02,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:02,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694679748] [2022-07-19 21:47:02,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694679748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:02,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376375718] [2022-07-19 21:47:02,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 21:47:02,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:02,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:02,084 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) [2022-07-19 21:47:02,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 21:47:02,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 21:47:02,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:47:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:47:02,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:47:02,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:47:02,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376375718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:02,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:02,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-07-19 21:47:02,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216192212] [2022-07-19 21:47:02,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:02,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:47:02,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:02,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:47:02,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:47:02,867 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-19 21:47:02,868 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 897 transitions, 10446 flow. Second operand has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:02,868 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:02,868 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-19 21:47:02,869 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:47:12,094 INFO L129 PetriNetUnfolder]: 5764/23078 cut-off events. [2022-07-19 21:47:12,094 INFO L130 PetriNetUnfolder]: For 179908/180899 co-relation queries the response was YES. [2022-07-19 21:47:12,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102854 conditions, 23078 events. 5764/23078 cut-off events. For 179908/180899 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 298374 event pairs, 1623 based on Foata normal form. 202/21766 useless extension candidates. Maximal degree in co-relation 102696. Up to 2201 conditions per place. [2022-07-19 21:47:12,695 INFO L132 encePairwiseOnDemand]: 164/179 looper letters, 241 selfloop transitions, 481 changer transitions 0/1095 dead transitions. [2022-07-19 21:47:12,695 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 1095 transitions, 14036 flow [2022-07-19 21:47:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-19 21:47:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-07-19 21:47:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 10075 transitions. [2022-07-19 21:47:12,705 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8277193558987841 [2022-07-19 21:47:12,705 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 10075 transitions. [2022-07-19 21:47:12,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 10075 transitions. [2022-07-19 21:47:12,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:47:12,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 10075 transitions. [2022-07-19 21:47:12,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 148.16176470588235) internal successors, (10075), 68 states have internal predecessors, (10075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:12,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:12,733 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 179.0) internal successors, (12351), 69 states have internal predecessors, (12351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:12,734 INFO L186 Difference]: Start difference. First operand has 568 places, 897 transitions, 10446 flow. Second operand 68 states and 10075 transitions. [2022-07-19 21:47:12,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 1095 transitions, 14036 flow [2022-07-19 21:47:14,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 1095 transitions, 13643 flow, removed 177 selfloop flow, removed 3 redundant places. [2022-07-19 21:47:14,623 INFO L242 Difference]: Finished difference. Result has 643 places, 948 transitions, 12264 flow [2022-07-19 21:47:14,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=10171, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=434, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=12264, PETRI_PLACES=643, PETRI_TRANSITIONS=948} [2022-07-19 21:47:14,625 INFO L279 CegarLoopForPetriNet]: 160 programPoint places, 483 predicate places. [2022-07-19 21:47:14,625 INFO L495 AbstractCegarLoop]: Abstraction has has 643 places, 948 transitions, 12264 flow [2022-07-19 21:47:14,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 144.75) internal successors, (2895), 20 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:14,626 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:47:14,626 INFO L200 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 21:47:14,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 21:47:14,831 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,SelfDestructingSolverStorable20 [2022-07-19 21:47:14,831 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-19 21:47:14,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:47:14,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1328439012, now seen corresponding path program 6 times [2022-07-19 21:47:14,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:47:14,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054532950] [2022-07-19 21:47:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:47:14,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:47:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:47:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:47:14,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:47:14,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054532950] [2022-07-19 21:47:14,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054532950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 21:47:14,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376713428] [2022-07-19 21:47:14,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 21:47:14,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 21:47:14,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:47:14,982 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) [2022-07-19 21:47:14,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 21:47:15,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 21:47:15,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 21:47:15,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 21:47:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 21:47:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:47:15,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 21:47:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 21:47:15,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376713428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 21:47:15,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 21:47:15,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-19 21:47:15,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967177422] [2022-07-19 21:47:15,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 21:47:15,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 21:47:15,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:47:15,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 21:47:15,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-07-19 21:47:15,544 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-19 21:47:15,545 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 948 transitions, 12264 flow. Second operand has 19 states, 19 states have (on average 144.73684210526315) internal successors, (2750), 19 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 21:47:15,545 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:47:15,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-19 21:47:15,546 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand