./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/parallel-misc-5.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 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:03:54,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:03:54,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:03:54,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:03:54,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:03:54,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:03:54,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:03:54,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:03:54,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:03:54,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:03:54,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:03:54,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:03:54,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:03:54,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:03:54,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:03:54,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:03:54,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:03:54,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:03:54,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:03:54,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:03:54,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:03:54,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:03:54,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:03:54,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:03:54,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:03:54,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:03:54,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:03:54,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:03:54,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:03:54,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:03:54,865 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:03:54,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:03:54,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:03:54,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:03:54,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:03:54,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:03:54,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:03:54,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:03:54,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:03:54,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:03:54,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:03:54,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:03:54,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:03:54,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:03:54,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:03:54,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:03:54,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:03:54,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:03:54,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:03:54,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:03:54,914 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:03:54,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:03:54,915 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:03:54,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:03:54,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:03:54,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:03:54,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:03:54,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:03:54,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:03:54,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:03:54,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:03:54,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:03:54,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:03:54,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:03:54,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:03:54,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:03:54,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:03:54,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:03:54,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:03:54,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:03:54,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:03:54,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:03:54,920 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:03:54,920 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:03:54,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:03:54,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:03:54,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a [2021-12-16 03:03:55,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:03:55,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:03:55,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:03:55,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:03:55,188 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:03:55,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2021-12-16 03:03:55,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2786aeb45/e625ab714cb543b481e7b79c76ab47ee/FLAGfa1dd88c1 [2021-12-16 03:03:55,705 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:03:55,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2021-12-16 03:03:55,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2786aeb45/e625ab714cb543b481e7b79c76ab47ee/FLAGfa1dd88c1 [2021-12-16 03:03:56,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2786aeb45/e625ab714cb543b481e7b79c76ab47ee [2021-12-16 03:03:56,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:03:56,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:03:56,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:03:56,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:03:56,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:03:56,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,120 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101c69a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56, skipping insertion in model container [2021-12-16 03:03:56,120 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:03:56,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:03:56,310 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/parallel-misc-5.wvr.c[3027,3040] [2021-12-16 03:03:56,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:03:56,323 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:03:56,367 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/parallel-misc-5.wvr.c[3027,3040] [2021-12-16 03:03:56,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:03:56,382 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:03:56,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56 WrapperNode [2021-12-16 03:03:56,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:03:56,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:03:56,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:03:56,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:03:56,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,439 INFO L137 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 143 [2021-12-16 03:03:56,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:03:56,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:03:56,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:03:56,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:03:56,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:03:56,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:03:56,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:03:56,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:03:56,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (1/1) ... [2021-12-16 03:03:56,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:03:56,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:56,526 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) [2021-12-16 03:03:56,530 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 [2021-12-16 03:03:56,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:03:56,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:03:56,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:03:56,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:03:56,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:03:56,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-16 03:03:56,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-16 03:03:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:03:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:03:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:03:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:03:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:03:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:03:56,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:03:56,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:03:56,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:03:56,563 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 03:03:56,643 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:03:56,645 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:03:56,918 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:03:56,988 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:03:56,988 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 03:03:56,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:03:56 BoogieIcfgContainer [2021-12-16 03:03:56,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:03:56,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:03:56,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:03:56,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:03:56,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:03:56" (1/3) ... [2021-12-16 03:03:56,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258759cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:03:56, skipping insertion in model container [2021-12-16 03:03:56,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:03:56" (2/3) ... [2021-12-16 03:03:56,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258759cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:03:56, skipping insertion in model container [2021-12-16 03:03:56,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:03:56" (3/3) ... [2021-12-16 03:03:56,998 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2021-12-16 03:03:57,004 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:03:57,004 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:03:57,005 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:03:57,005 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:03:57,045 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,045 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,046 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,046 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,046 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,046 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,048 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,048 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,048 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,048 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,048 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,049 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,049 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,049 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,050 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,051 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,051 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,051 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,051 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,051 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,051 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,052 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,053 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,053 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,054 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,054 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,054 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,054 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,054 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,054 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,055 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,055 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,055 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,055 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,056 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,056 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,056 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,056 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,056 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,057 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,057 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,057 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,057 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,058 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,058 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,058 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,059 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,059 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,059 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,059 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,060 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,060 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,060 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,060 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,060 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,061 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,061 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,061 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,065 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,066 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,067 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,068 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,068 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,070 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,072 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,073 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,073 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,073 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,073 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,074 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,074 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,074 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,075 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,082 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,082 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:03:57,086 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-16 03:03:57,136 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:03:57,145 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 03:03:57,145 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-16 03:03:57,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 242 flow [2021-12-16 03:03:57,207 INFO L129 PetriNetUnfolder]: 7/106 cut-off events. [2021-12-16 03:03:57,207 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-16 03:03:57,211 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 7/106 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 83. Up to 2 conditions per place. [2021-12-16 03:03:57,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 242 flow [2021-12-16 03:03:57,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 95 transitions, 208 flow [2021-12-16 03:03:57,254 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-12-16 03:03:57,255 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-16 03:03:57,256 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:57,256 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:57,257 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:57,263 INFO L85 PathProgramCache]: Analyzing trace with hash 851355942, now seen corresponding path program 1 times [2021-12-16 03:03:57,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:57,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590560778] [2021-12-16 03:03:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:57,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:57,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:57,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590560778] [2021-12-16 03:03:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590560778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:57,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:57,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:03:57,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333646139] [2021-12-16 03:03:57,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:57,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:03:57,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:57,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:03:57,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:03:57,493 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 109 [2021-12-16 03:03:57,496 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 95 transitions, 208 flow. Second operand has 2 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:57,496 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:57,497 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 109 [2021-12-16 03:03:57,498 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:57,579 INFO L129 PetriNetUnfolder]: 36/184 cut-off events. [2021-12-16 03:03:57,579 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-12-16 03:03:57,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 184 events. 36/184 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 454 event pairs, 7 based on Foata normal form. 18/184 useless extension candidates. Maximal degree in co-relation 178. Up to 49 conditions per place. [2021-12-16 03:03:57,583 INFO L132 encePairwiseOnDemand]: 106/109 looper letters, 10 selfloop transitions, 0 changer transitions 1/92 dead transitions. [2021-12-16 03:03:57,583 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 92 transitions, 222 flow [2021-12-16 03:03:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:03:57,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:03:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 203 transitions. [2021-12-16 03:03:57,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9311926605504587 [2021-12-16 03:03:57,600 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 203 transitions. [2021-12-16 03:03:57,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 203 transitions. [2021-12-16 03:03:57,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:57,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 203 transitions. [2021-12-16 03:03:57,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.5) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:57,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:57,610 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:57,612 INFO L186 Difference]: Start difference. First operand has 98 places, 95 transitions, 208 flow. Second operand 2 states and 203 transitions. [2021-12-16 03:03:57,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 92 transitions, 222 flow [2021-12-16 03:03:57,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-16 03:03:57,621 INFO L242 Difference]: Finished difference. Result has 93 places, 91 transitions, 188 flow [2021-12-16 03:03:57,625 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=188, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2021-12-16 03:03:57,629 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, -5 predicate places. [2021-12-16 03:03:57,630 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 188 flow [2021-12-16 03:03:57,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:57,630 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:57,631 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:57,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:03:57,631 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:57,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:57,632 INFO L85 PathProgramCache]: Analyzing trace with hash -283457211, now seen corresponding path program 1 times [2021-12-16 03:03:57,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:57,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287022773] [2021-12-16 03:03:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:57,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:57,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:57,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287022773] [2021-12-16 03:03:57,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287022773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:57,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:57,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:03:57,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24988608] [2021-12-16 03:03:57,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:57,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:03:57,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:57,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:03:57,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:03:57,933 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 109 [2021-12-16 03:03:57,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:57,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:57,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 109 [2021-12-16 03:03:57,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:58,169 INFO L129 PetriNetUnfolder]: 95/279 cut-off events. [2021-12-16 03:03:58,169 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-16 03:03:58,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 279 events. 95/279 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 965 event pairs, 2 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 445. Up to 71 conditions per place. [2021-12-16 03:03:58,172 INFO L132 encePairwiseOnDemand]: 103/109 looper letters, 33 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2021-12-16 03:03:58,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 300 flow [2021-12-16 03:03:58,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:03:58,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:03:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 526 transitions. [2021-12-16 03:03:58,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8042813455657493 [2021-12-16 03:03:58,178 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 526 transitions. [2021-12-16 03:03:58,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 526 transitions. [2021-12-16 03:03:58,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:58,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 526 transitions. [2021-12-16 03:03:58,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,185 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,185 INFO L186 Difference]: Start difference. First operand has 93 places, 91 transitions, 188 flow. Second operand 6 states and 526 transitions. [2021-12-16 03:03:58,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 300 flow [2021-12-16 03:03:58,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 107 transitions, 300 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:03:58,188 INFO L242 Difference]: Finished difference. Result has 99 places, 93 transitions, 213 flow [2021-12-16 03:03:58,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2021-12-16 03:03:58,204 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 1 predicate places. [2021-12-16 03:03:58,204 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 213 flow [2021-12-16 03:03:58,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,205 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:58,205 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:58,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:03:58,206 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:58,206 INFO L85 PathProgramCache]: Analyzing trace with hash -337069583, now seen corresponding path program 2 times [2021-12-16 03:03:58,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:58,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418249119] [2021-12-16 03:03:58,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:58,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:58,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:58,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418249119] [2021-12-16 03:03:58,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418249119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:58,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:58,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:03:58,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237610705] [2021-12-16 03:03:58,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:58,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:03:58,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:03:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:03:58,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 109 [2021-12-16 03:03:58,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:58,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 109 [2021-12-16 03:03:58,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:58,603 INFO L129 PetriNetUnfolder]: 99/326 cut-off events. [2021-12-16 03:03:58,604 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2021-12-16 03:03:58,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 552 conditions, 326 events. 99/326 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1311 event pairs, 20 based on Foata normal form. 3/297 useless extension candidates. Maximal degree in co-relation 546. Up to 71 conditions per place. [2021-12-16 03:03:58,608 INFO L132 encePairwiseOnDemand]: 101/109 looper letters, 36 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2021-12-16 03:03:58,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 341 flow [2021-12-16 03:03:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:03:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:03:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2021-12-16 03:03:58,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8020969855832241 [2021-12-16 03:03:58,613 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2021-12-16 03:03:58,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2021-12-16 03:03:58,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:58,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2021-12-16 03:03:58,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.42857142857143) internal successors, (612), 7 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,620 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,620 INFO L186 Difference]: Start difference. First operand has 99 places, 93 transitions, 213 flow. Second operand 7 states and 612 transitions. [2021-12-16 03:03:58,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 341 flow [2021-12-16 03:03:58,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 112 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-16 03:03:58,624 INFO L242 Difference]: Finished difference. Result has 104 places, 95 transitions, 239 flow [2021-12-16 03:03:58,624 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=104, PETRI_TRANSITIONS=95} [2021-12-16 03:03:58,625 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 6 predicate places. [2021-12-16 03:03:58,625 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 95 transitions, 239 flow [2021-12-16 03:03:58,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.66666666666667) internal successors, (502), 6 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,626 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:58,626 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:58,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 03:03:58,626 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:58,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1355540335, now seen corresponding path program 3 times [2021-12-16 03:03:58,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:58,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455785764] [2021-12-16 03:03:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:58,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:58,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:58,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455785764] [2021-12-16 03:03:58,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455785764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:03:58,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:03:58,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 03:03:58,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473628116] [2021-12-16 03:03:58,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:03:58,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 03:03:58,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:58,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 03:03:58,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 03:03:58,806 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 109 [2021-12-16 03:03:58,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 95 transitions, 239 flow. Second operand has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:58,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:58,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 109 [2021-12-16 03:03:58,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:59,022 INFO L129 PetriNetUnfolder]: 224/608 cut-off events. [2021-12-16 03:03:59,023 INFO L130 PetriNetUnfolder]: For 248/248 co-relation queries the response was YES. [2021-12-16 03:03:59,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 608 events. 224/608 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3213 event pairs, 29 based on Foata normal form. 6/557 useless extension candidates. Maximal degree in co-relation 1166. Up to 157 conditions per place. [2021-12-16 03:03:59,030 INFO L132 encePairwiseOnDemand]: 98/109 looper letters, 33 selfloop transitions, 7 changer transitions 36/142 dead transitions. [2021-12-16 03:03:59,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 142 transitions, 539 flow [2021-12-16 03:03:59,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 03:03:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 03:03:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 784 transitions. [2021-12-16 03:03:59,033 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.799184505606524 [2021-12-16 03:03:59,033 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 784 transitions. [2021-12-16 03:03:59,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 784 transitions. [2021-12-16 03:03:59,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:59,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 784 transitions. [2021-12-16 03:03:59,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 87.11111111111111) internal successors, (784), 9 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:59,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:59,038 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 109.0) internal successors, (1090), 10 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:59,038 INFO L186 Difference]: Start difference. First operand has 104 places, 95 transitions, 239 flow. Second operand 9 states and 784 transitions. [2021-12-16 03:03:59,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 142 transitions, 539 flow [2021-12-16 03:03:59,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 142 transitions, 526 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:03:59,046 INFO L242 Difference]: Finished difference. Result has 113 places, 97 transitions, 281 flow [2021-12-16 03:03:59,046 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=281, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2021-12-16 03:03:59,048 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 15 predicate places. [2021-12-16 03:03:59,048 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 281 flow [2021-12-16 03:03:59,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 81.57142857142857) internal successors, (571), 7 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:59,048 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:59,048 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:03:59,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 03:03:59,049 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:03:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:03:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash 2035553460, now seen corresponding path program 1 times [2021-12-16 03:03:59,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:03:59,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674550943] [2021-12-16 03:03:59,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:59,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:03:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:59,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:03:59,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674550943] [2021-12-16 03:03:59,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674550943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:03:59,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551268406] [2021-12-16 03:03:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:03:59,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:03:59,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:03:59,215 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) [2021-12-16 03:03:59,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 03:03:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:03:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 03:03:59,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:03:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:59,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:03:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:03:59,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551268406] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:03:59,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:03:59,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-16 03:03:59,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236883419] [2021-12-16 03:03:59,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:03:59,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:03:59,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:03:59,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:03:59,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:03:59,750 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 109 [2021-12-16 03:03:59,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:59,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:03:59,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 109 [2021-12-16 03:03:59,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:03:59,945 INFO L129 PetriNetUnfolder]: 323/827 cut-off events. [2021-12-16 03:03:59,946 INFO L130 PetriNetUnfolder]: For 656/662 co-relation queries the response was YES. [2021-12-16 03:03:59,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1895 conditions, 827 events. 323/827 cut-off events. For 656/662 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4805 event pairs, 17 based on Foata normal form. 6/753 useless extension candidates. Maximal degree in co-relation 1882. Up to 179 conditions per place. [2021-12-16 03:03:59,956 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 55 selfloop transitions, 18 changer transitions 6/148 dead transitions. [2021-12-16 03:03:59,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 678 flow [2021-12-16 03:03:59,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:03:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:03:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2021-12-16 03:03:59,958 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854521625163827 [2021-12-16 03:03:59,958 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2021-12-16 03:03:59,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2021-12-16 03:03:59,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:03:59,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2021-12-16 03:03:59,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:59,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:59,963 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:59,963 INFO L186 Difference]: Start difference. First operand has 113 places, 97 transitions, 281 flow. Second operand 7 states and 652 transitions. [2021-12-16 03:03:59,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 678 flow [2021-12-16 03:03:59,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 650 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-12-16 03:03:59,971 INFO L242 Difference]: Finished difference. Result has 116 places, 110 transitions, 420 flow [2021-12-16 03:03:59,971 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=116, PETRI_TRANSITIONS=110} [2021-12-16 03:03:59,972 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 18 predicate places. [2021-12-16 03:03:59,972 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 110 transitions, 420 flow [2021-12-16 03:03:59,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.16666666666667) internal successors, (517), 6 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:03:59,973 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:03:59,973 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:04:00,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-16 03:04:00,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:00,192 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:00,192 INFO L85 PathProgramCache]: Analyzing trace with hash 60102788, now seen corresponding path program 2 times [2021-12-16 03:04:00,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:00,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093962775] [2021-12-16 03:04:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:00,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:00,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:00,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093962775] [2021-12-16 03:04:00,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093962775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:04:00,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:04:00,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 03:04:00,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917249486] [2021-12-16 03:04:00,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:04:00,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:04:00,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:04:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 03:04:00,339 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 109 [2021-12-16 03:04:00,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 110 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:00,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:00,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 109 [2021-12-16 03:04:00,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:00,436 INFO L129 PetriNetUnfolder]: 177/546 cut-off events. [2021-12-16 03:04:00,437 INFO L130 PetriNetUnfolder]: For 794/818 co-relation queries the response was YES. [2021-12-16 03:04:00,440 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1335 conditions, 546 events. 177/546 cut-off events. For 794/818 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2633 event pairs, 11 based on Foata normal form. 12/498 useless extension candidates. Maximal degree in co-relation 1319. Up to 189 conditions per place. [2021-12-16 03:04:00,444 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 24 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2021-12-16 03:04:00,444 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 115 transitions, 494 flow [2021-12-16 03:04:00,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 03:04:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-16 03:04:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 450 transitions. [2021-12-16 03:04:00,446 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256880733944955 [2021-12-16 03:04:00,447 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 450 transitions. [2021-12-16 03:04:00,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 450 transitions. [2021-12-16 03:04:00,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:00,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 450 transitions. [2021-12-16 03:04:00,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:00,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:00,451 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:00,452 INFO L186 Difference]: Start difference. First operand has 116 places, 110 transitions, 420 flow. Second operand 5 states and 450 transitions. [2021-12-16 03:04:00,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 115 transitions, 494 flow [2021-12-16 03:04:00,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 115 transitions, 490 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-16 03:04:00,459 INFO L242 Difference]: Finished difference. Result has 120 places, 113 transitions, 448 flow [2021-12-16 03:04:00,459 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=448, PETRI_PLACES=120, PETRI_TRANSITIONS=113} [2021-12-16 03:04:00,462 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 22 predicate places. [2021-12-16 03:04:00,462 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 113 transitions, 448 flow [2021-12-16 03:04:00,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:00,462 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:00,463 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:04:00,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 03:04:00,463 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash 220382001, now seen corresponding path program 1 times [2021-12-16 03:04:00,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:00,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169404609] [2021-12-16 03:04:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:00,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:00,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:00,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169404609] [2021-12-16 03:04:00,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169404609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:00,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341685712] [2021-12-16 03:04:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:00,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:00,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:00,558 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) [2021-12-16 03:04:00,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 03:04:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 03:04:00,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:00,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:00,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341685712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:04:00,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:04:00,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-16 03:04:00,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492219260] [2021-12-16 03:04:00,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:04:00,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:04:00,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:04:00,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:04:00,918 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 109 [2021-12-16 03:04:00,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 113 transitions, 448 flow. Second operand has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:00,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:00,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 109 [2021-12-16 03:04:00,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:01,125 INFO L129 PetriNetUnfolder]: 380/1031 cut-off events. [2021-12-16 03:04:01,126 INFO L130 PetriNetUnfolder]: For 1968/1997 co-relation queries the response was YES. [2021-12-16 03:04:01,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3001 conditions, 1031 events. 380/1031 cut-off events. For 1968/1997 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6340 event pairs, 32 based on Foata normal form. 32/976 useless extension candidates. Maximal degree in co-relation 2984. Up to 294 conditions per place. [2021-12-16 03:04:01,138 INFO L132 encePairwiseOnDemand]: 104/109 looper letters, 69 selfloop transitions, 19 changer transitions 5/166 dead transitions. [2021-12-16 03:04:01,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 166 transitions, 992 flow [2021-12-16 03:04:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:04:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:04:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 566 transitions. [2021-12-16 03:04:01,140 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8654434250764526 [2021-12-16 03:04:01,140 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 566 transitions. [2021-12-16 03:04:01,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 566 transitions. [2021-12-16 03:04:01,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:01,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 566 transitions. [2021-12-16 03:04:01,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:01,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:01,143 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:01,144 INFO L186 Difference]: Start difference. First operand has 120 places, 113 transitions, 448 flow. Second operand 6 states and 566 transitions. [2021-12-16 03:04:01,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 166 transitions, 992 flow [2021-12-16 03:04:01,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 166 transitions, 982 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-16 03:04:01,153 INFO L242 Difference]: Finished difference. Result has 126 places, 126 transitions, 643 flow [2021-12-16 03:04:01,154 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=643, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2021-12-16 03:04:01,154 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 28 predicate places. [2021-12-16 03:04:01,154 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 643 flow [2021-12-16 03:04:01,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:01,155 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:01,155 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:04:01,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 03:04:01,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-16 03:04:01,372 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:01,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1288708367, now seen corresponding path program 2 times [2021-12-16 03:04:01,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:01,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144695667] [2021-12-16 03:04:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:01,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:01,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144695667] [2021-12-16 03:04:01,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144695667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488870420] [2021-12-16 03:04:01,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:04:01,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:01,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:01,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:04:01,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 03:04:01,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:04:01,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:04:01,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 03:04:01,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:01,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:04:01,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488870420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:04:01,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:04:01,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-16 03:04:01,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914793043] [2021-12-16 03:04:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:04:01,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:04:01,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:01,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:04:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:04:01,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 109 [2021-12-16 03:04:01,802 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 643 flow. Second operand has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:01,802 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:01,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 109 [2021-12-16 03:04:01,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:01,958 INFO L129 PetriNetUnfolder]: 192/796 cut-off events. [2021-12-16 03:04:01,959 INFO L130 PetriNetUnfolder]: For 1896/1958 co-relation queries the response was YES. [2021-12-16 03:04:01,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 796 events. 192/796 cut-off events. For 1896/1958 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5117 event pairs, 25 based on Foata normal form. 49/754 useless extension candidates. Maximal degree in co-relation 2168. Up to 124 conditions per place. [2021-12-16 03:04:01,969 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 21 selfloop transitions, 7 changer transitions 0/133 dead transitions. [2021-12-16 03:04:01,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 133 transitions, 727 flow [2021-12-16 03:04:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:04:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:04:01,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 552 transitions. [2021-12-16 03:04:01,971 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8440366972477065 [2021-12-16 03:04:01,971 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 552 transitions. [2021-12-16 03:04:01,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 552 transitions. [2021-12-16 03:04:01,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:01,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 552 transitions. [2021-12-16 03:04:01,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:01,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:01,976 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:01,976 INFO L186 Difference]: Start difference. First operand has 126 places, 126 transitions, 643 flow. Second operand 6 states and 552 transitions. [2021-12-16 03:04:01,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 133 transitions, 727 flow [2021-12-16 03:04:01,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 133 transitions, 727 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:04:01,984 INFO L242 Difference]: Finished difference. Result has 132 places, 126 transitions, 664 flow [2021-12-16 03:04:01,984 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=664, PETRI_PLACES=132, PETRI_TRANSITIONS=126} [2021-12-16 03:04:01,987 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 34 predicate places. [2021-12-16 03:04:01,987 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 126 transitions, 664 flow [2021-12-16 03:04:01,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.6) internal successors, (453), 5 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:01,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:01,988 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-12-16 03:04:02,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 03:04:02,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:02,212 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1751105408, now seen corresponding path program 1 times [2021-12-16 03:04:02,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077352747] [2021-12-16 03:04:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:02,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:02,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:02,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077352747] [2021-12-16 03:04:02,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077352747] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:02,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337057854] [2021-12-16 03:04:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:02,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:02,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:02,314 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) [2021-12-16 03:04:02,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 03:04:02,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:02,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 03:04:02,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:02,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:02,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337057854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:04:02,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:04:02,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-16 03:04:02,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965478328] [2021-12-16 03:04:02,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:04:02,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 03:04:02,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:02,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 03:04:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-12-16 03:04:02,994 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 109 [2021-12-16 03:04:02,996 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 126 transitions, 664 flow. Second operand has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:02,996 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:02,996 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 109 [2021-12-16 03:04:02,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:03,987 INFO L129 PetriNetUnfolder]: 1017/2857 cut-off events. [2021-12-16 03:04:03,987 INFO L130 PetriNetUnfolder]: For 10459/10751 co-relation queries the response was YES. [2021-12-16 03:04:04,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9813 conditions, 2857 events. 1017/2857 cut-off events. For 10459/10751 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23724 event pairs, 42 based on Foata normal form. 137/2757 useless extension candidates. Maximal degree in co-relation 9791. Up to 414 conditions per place. [2021-12-16 03:04:04,018 INFO L132 encePairwiseOnDemand]: 94/109 looper letters, 111 selfloop transitions, 57 changer transitions 129/372 dead transitions. [2021-12-16 03:04:04,018 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 372 transitions, 3407 flow [2021-12-16 03:04:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 03:04:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-16 03:04:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2267 transitions. [2021-12-16 03:04:04,024 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7703024125042474 [2021-12-16 03:04:04,024 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2267 transitions. [2021-12-16 03:04:04,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2267 transitions. [2021-12-16 03:04:04,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:04,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2267 transitions. [2021-12-16 03:04:04,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 83.96296296296296) internal successors, (2267), 27 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:04,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 109.0) internal successors, (3052), 28 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:04,037 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 109.0) internal successors, (3052), 28 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:04,037 INFO L186 Difference]: Start difference. First operand has 132 places, 126 transitions, 664 flow. Second operand 27 states and 2267 transitions. [2021-12-16 03:04:04,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 372 transitions, 3407 flow [2021-12-16 03:04:04,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 372 transitions, 3375 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:04:04,064 INFO L242 Difference]: Finished difference. Result has 170 places, 169 transitions, 1282 flow [2021-12-16 03:04:04,064 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1282, PETRI_PLACES=170, PETRI_TRANSITIONS=169} [2021-12-16 03:04:04,065 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 72 predicate places. [2021-12-16 03:04:04,065 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 169 transitions, 1282 flow [2021-12-16 03:04:04,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.0) internal successors, (1520), 19 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:04,066 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:04,066 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-12-16 03:04:04,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 03:04:04,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:04,279 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:04,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:04,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1123182903, now seen corresponding path program 1 times [2021-12-16 03:04:04,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:04,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630984997] [2021-12-16 03:04:04,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:04,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:04,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:04,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630984997] [2021-12-16 03:04:04,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630984997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:04,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564271663] [2021-12-16 03:04:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:04,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:04,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:04,409 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) [2021-12-16 03:04:04,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 03:04:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 03:04:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 03:04:04,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 03:04:04,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564271663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:04:04,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 03:04:04,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-12-16 03:04:04,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502666679] [2021-12-16 03:04:04,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:04:04,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:04:04,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:04,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:04:04,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-16 03:04:04,749 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 109 [2021-12-16 03:04:04,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 169 transitions, 1282 flow. Second operand has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:04,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:04,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 109 [2021-12-16 03:04:04,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:05,115 INFO L129 PetriNetUnfolder]: 512/1728 cut-off events. [2021-12-16 03:04:05,115 INFO L130 PetriNetUnfolder]: For 14879/15161 co-relation queries the response was YES. [2021-12-16 03:04:05,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6807 conditions, 1728 events. 512/1728 cut-off events. For 14879/15161 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12963 event pairs, 66 based on Foata normal form. 50/1581 useless extension candidates. Maximal degree in co-relation 6769. Up to 487 conditions per place. [2021-12-16 03:04:05,141 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 56 selfloop transitions, 18 changer transitions 0/185 dead transitions. [2021-12-16 03:04:05,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 185 transitions, 1585 flow [2021-12-16 03:04:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:04:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:04:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 628 transitions. [2021-12-16 03:04:05,143 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8230668414154653 [2021-12-16 03:04:05,143 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 628 transitions. [2021-12-16 03:04:05,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 628 transitions. [2021-12-16 03:04:05,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:05,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 628 transitions. [2021-12-16 03:04:05,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.71428571428571) internal successors, (628), 7 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:05,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:05,147 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:05,147 INFO L186 Difference]: Start difference. First operand has 170 places, 169 transitions, 1282 flow. Second operand 7 states and 628 transitions. [2021-12-16 03:04:05,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 185 transitions, 1585 flow [2021-12-16 03:04:05,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 185 transitions, 1411 flow, removed 83 selfloop flow, removed 11 redundant places. [2021-12-16 03:04:05,186 INFO L242 Difference]: Finished difference. Result has 155 places, 181 transitions, 1337 flow [2021-12-16 03:04:05,187 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1337, PETRI_PLACES=155, PETRI_TRANSITIONS=181} [2021-12-16 03:04:05,187 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 57 predicate places. [2021-12-16 03:04:05,187 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 181 transitions, 1337 flow [2021-12-16 03:04:05,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:05,188 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:05,188 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2021-12-16 03:04:05,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:04:05,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 03:04:05,405 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash -898025712, now seen corresponding path program 1 times [2021-12-16 03:04:05,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:05,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167000330] [2021-12-16 03:04:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:05,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:04:05,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:05,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167000330] [2021-12-16 03:04:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167000330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:05,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515475682] [2021-12-16 03:04:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:05,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:05,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:05,484 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) [2021-12-16 03:04:05,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 03:04:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:05,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 03:04:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:05,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:04:06,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515475682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:04:06,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:04:06,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2021-12-16 03:04:06,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359744942] [2021-12-16 03:04:06,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:04:06,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 03:04:06,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 03:04:06,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-16 03:04:06,026 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 109 [2021-12-16 03:04:06,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 181 transitions, 1337 flow. Second operand has 11 states, 11 states have (on average 87.54545454545455) internal successors, (963), 11 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:06,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:06,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 109 [2021-12-16 03:04:06,028 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:06,565 INFO L129 PetriNetUnfolder]: 781/2864 cut-off events. [2021-12-16 03:04:06,565 INFO L130 PetriNetUnfolder]: For 17789/18349 co-relation queries the response was YES. [2021-12-16 03:04:06,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10215 conditions, 2864 events. 781/2864 cut-off events. For 17789/18349 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 25745 event pairs, 72 based on Foata normal form. 205/2727 useless extension candidates. Maximal degree in co-relation 10182. Up to 365 conditions per place. [2021-12-16 03:04:06,609 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 83 selfloop transitions, 66 changer transitions 0/260 dead transitions. [2021-12-16 03:04:06,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 260 transitions, 2375 flow [2021-12-16 03:04:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 03:04:06,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-16 03:04:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 998 transitions. [2021-12-16 03:04:06,612 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8323603002502085 [2021-12-16 03:04:06,612 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 998 transitions. [2021-12-16 03:04:06,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 998 transitions. [2021-12-16 03:04:06,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:06,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 998 transitions. [2021-12-16 03:04:06,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 90.72727272727273) internal successors, (998), 11 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:06,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 109.0) internal successors, (1308), 12 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:06,617 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 109.0) internal successors, (1308), 12 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:06,617 INFO L186 Difference]: Start difference. First operand has 155 places, 181 transitions, 1337 flow. Second operand 11 states and 998 transitions. [2021-12-16 03:04:06,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 260 transitions, 2375 flow [2021-12-16 03:04:06,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 2323 flow, removed 19 selfloop flow, removed 4 redundant places. [2021-12-16 03:04:06,693 INFO L242 Difference]: Finished difference. Result has 167 places, 222 transitions, 2043 flow [2021-12-16 03:04:06,693 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2043, PETRI_PLACES=167, PETRI_TRANSITIONS=222} [2021-12-16 03:04:06,694 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 69 predicate places. [2021-12-16 03:04:06,694 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 222 transitions, 2043 flow [2021-12-16 03:04:06,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 87.54545454545455) internal successors, (963), 11 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:06,694 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:06,694 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 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] [2021-12-16 03:04:06,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-16 03:04:06,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:06,919 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:06,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1716556081, now seen corresponding path program 2 times [2021-12-16 03:04:06,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:06,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358040355] [2021-12-16 03:04:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:06,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 03:04:07,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:07,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358040355] [2021-12-16 03:04:07,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358040355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:07,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777129464] [2021-12-16 03:04:07,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:04:07,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:07,039 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) [2021-12-16 03:04:07,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 03:04:07,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:04:07,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:04:07,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:04:07,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 03:04:07,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 03:04:07,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777129464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:04:07,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:04:07,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 15 [2021-12-16 03:04:07,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845561584] [2021-12-16 03:04:07,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:04:07,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-16 03:04:07,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-16 03:04:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-16 03:04:07,493 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 109 [2021-12-16 03:04:07,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 222 transitions, 2043 flow. Second operand has 15 states, 15 states have (on average 81.86666666666666) internal successors, (1228), 15 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:07,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:07,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 109 [2021-12-16 03:04:07,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:09,604 INFO L129 PetriNetUnfolder]: 2936/7961 cut-off events. [2021-12-16 03:04:09,604 INFO L130 PetriNetUnfolder]: For 75811/76891 co-relation queries the response was YES. [2021-12-16 03:04:09,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35005 conditions, 7961 events. 2936/7961 cut-off events. For 75811/76891 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 79366 event pairs, 174 based on Foata normal form. 533/7739 useless extension candidates. Maximal degree in co-relation 34966. Up to 1029 conditions per place. [2021-12-16 03:04:09,738 INFO L132 encePairwiseOnDemand]: 95/109 looper letters, 130 selfloop transitions, 189 changer transitions 173/569 dead transitions. [2021-12-16 03:04:09,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 569 transitions, 8135 flow [2021-12-16 03:04:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-16 03:04:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-16 03:04:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2225 transitions. [2021-12-16 03:04:09,745 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7851093860268172 [2021-12-16 03:04:09,745 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2225 transitions. [2021-12-16 03:04:09,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2225 transitions. [2021-12-16 03:04:09,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:09,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2225 transitions. [2021-12-16 03:04:09,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 85.57692307692308) internal successors, (2225), 26 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:09,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 109.0) internal successors, (2943), 27 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:09,756 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 109.0) internal successors, (2943), 27 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:09,757 INFO L186 Difference]: Start difference. First operand has 167 places, 222 transitions, 2043 flow. Second operand 26 states and 2225 transitions. [2021-12-16 03:04:09,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 569 transitions, 8135 flow [2021-12-16 03:04:09,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 569 transitions, 7771 flow, removed 178 selfloop flow, removed 3 redundant places. [2021-12-16 03:04:09,955 INFO L242 Difference]: Finished difference. Result has 205 places, 326 transitions, 4163 flow [2021-12-16 03:04:09,956 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4163, PETRI_PLACES=205, PETRI_TRANSITIONS=326} [2021-12-16 03:04:09,956 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 107 predicate places. [2021-12-16 03:04:09,956 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 326 transitions, 4163 flow [2021-12-16 03:04:09,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.86666666666666) internal successors, (1228), 15 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:09,957 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:09,957 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:04:09,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 03:04:10,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:10,183 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:10,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1480579446, now seen corresponding path program 3 times [2021-12-16 03:04:10,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:10,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584579981] [2021-12-16 03:04:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:10,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 03:04:10,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:10,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584579981] [2021-12-16 03:04:10,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584579981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:10,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37115690] [2021-12-16 03:04:10,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:04:10,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:10,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:10,279 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) [2021-12-16 03:04:10,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 03:04:10,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 03:04:10,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:04:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 03:04:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 03:04:10,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 03:04:10,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37115690] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:10,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:04:10,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2021-12-16 03:04:10,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290154388] [2021-12-16 03:04:10,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:04:10,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:04:10,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:10,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:04:10,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:04:10,730 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 109 [2021-12-16 03:04:10,731 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 326 transitions, 4163 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:10,731 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:10,731 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 109 [2021-12-16 03:04:10,731 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:12,796 INFO L129 PetriNetUnfolder]: 4903/11573 cut-off events. [2021-12-16 03:04:12,797 INFO L130 PetriNetUnfolder]: For 131895/132257 co-relation queries the response was YES. [2021-12-16 03:04:13,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56854 conditions, 11573 events. 4903/11573 cut-off events. For 131895/132257 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 117168 event pairs, 480 based on Foata normal form. 104/10804 useless extension candidates. Maximal degree in co-relation 56798. Up to 4584 conditions per place. [2021-12-16 03:04:13,095 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 388 selfloop transitions, 93 changer transitions 0/550 dead transitions. [2021-12-16 03:04:13,095 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 550 transitions, 8277 flow [2021-12-16 03:04:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:04:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:04:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2021-12-16 03:04:13,097 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854521625163827 [2021-12-16 03:04:13,097 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2021-12-16 03:04:13,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2021-12-16 03:04:13,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:13,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2021-12-16 03:04:13,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:13,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:13,101 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 109.0) internal successors, (872), 8 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:13,101 INFO L186 Difference]: Start difference. First operand has 205 places, 326 transitions, 4163 flow. Second operand 7 states and 652 transitions. [2021-12-16 03:04:13,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 550 transitions, 8277 flow [2021-12-16 03:04:13,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 550 transitions, 7628 flow, removed 315 selfloop flow, removed 14 redundant places. [2021-12-16 03:04:13,805 INFO L242 Difference]: Finished difference. Result has 191 places, 400 transitions, 5274 flow [2021-12-16 03:04:13,806 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5274, PETRI_PLACES=191, PETRI_TRANSITIONS=400} [2021-12-16 03:04:13,806 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 93 predicate places. [2021-12-16 03:04:13,807 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 400 transitions, 5274 flow [2021-12-16 03:04:13,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:13,807 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:13,807 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:04:13,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 03:04:14,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 03:04:14,009 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:14,009 INFO L85 PathProgramCache]: Analyzing trace with hash -409857966, now seen corresponding path program 4 times [2021-12-16 03:04:14,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:14,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166136520] [2021-12-16 03:04:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:14,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:04:14,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:14,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166136520] [2021-12-16 03:04:14,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166136520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:14,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39301431] [2021-12-16 03:04:14,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:04:14,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:14,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:14,110 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) [2021-12-16 03:04:14,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 03:04:14,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:04:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:04:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 03:04:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:04:14,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 03:04:14,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39301431] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:04:14,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:04:14,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2021-12-16 03:04:14,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886111954] [2021-12-16 03:04:14,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:04:14,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 03:04:14,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:14,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 03:04:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:04:14,755 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 109 [2021-12-16 03:04:14,756 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 400 transitions, 5274 flow. Second operand has 16 states, 16 states have (on average 87.5) internal successors, (1400), 16 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:14,756 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:14,756 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 109 [2021-12-16 03:04:14,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:17,338 INFO L129 PetriNetUnfolder]: 4512/15186 cut-off events. [2021-12-16 03:04:17,339 INFO L130 PetriNetUnfolder]: For 171971/173764 co-relation queries the response was YES. [2021-12-16 03:04:17,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72578 conditions, 15186 events. 4512/15186 cut-off events. For 171971/173764 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 174222 event pairs, 350 based on Foata normal form. 641/14268 useless extension candidates. Maximal degree in co-relation 72525. Up to 2975 conditions per place. [2021-12-16 03:04:17,558 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 268 selfloop transitions, 76 changer transitions 0/544 dead transitions. [2021-12-16 03:04:17,558 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 544 transitions, 8365 flow [2021-12-16 03:04:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 03:04:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 03:04:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1092 transitions. [2021-12-16 03:04:17,560 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8348623853211009 [2021-12-16 03:04:17,560 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1092 transitions. [2021-12-16 03:04:17,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1092 transitions. [2021-12-16 03:04:17,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:17,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1092 transitions. [2021-12-16 03:04:17,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:17,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:17,565 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:17,565 INFO L186 Difference]: Start difference. First operand has 191 places, 400 transitions, 5274 flow. Second operand 12 states and 1092 transitions. [2021-12-16 03:04:17,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 544 transitions, 8365 flow [2021-12-16 03:04:18,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 544 transitions, 8269 flow, removed 37 selfloop flow, removed 3 redundant places. [2021-12-16 03:04:18,193 INFO L242 Difference]: Finished difference. Result has 199 places, 380 transitions, 4961 flow [2021-12-16 03:04:18,193 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4961, PETRI_PLACES=199, PETRI_TRANSITIONS=380} [2021-12-16 03:04:18,194 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 101 predicate places. [2021-12-16 03:04:18,194 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 380 transitions, 4961 flow [2021-12-16 03:04:18,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.5) internal successors, (1400), 16 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:18,195 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:18,195 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 3, 3, 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] [2021-12-16 03:04:18,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 03:04:18,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 03:04:18,402 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:18,402 INFO L85 PathProgramCache]: Analyzing trace with hash 186629283, now seen corresponding path program 2 times [2021-12-16 03:04:18,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:18,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27382975] [2021-12-16 03:04:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:18,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 03:04:18,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27382975] [2021-12-16 03:04:18,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27382975] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:18,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729249487] [2021-12-16 03:04:18,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:04:18,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:18,480 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) [2021-12-16 03:04:18,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 03:04:18,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:04:18,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:04:18,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 03:04:18,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 03:04:18,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 03:04:18,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729249487] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:04:18,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:04:18,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10 [2021-12-16 03:04:18,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613389818] [2021-12-16 03:04:18,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:04:18,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:04:18,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:04:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:04:18,978 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 109 [2021-12-16 03:04:18,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 380 transitions, 4961 flow. Second operand has 10 states, 10 states have (on average 90.4) internal successors, (904), 10 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:18,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:18,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 109 [2021-12-16 03:04:18,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:23,015 INFO L129 PetriNetUnfolder]: 7684/25157 cut-off events. [2021-12-16 03:04:23,015 INFO L130 PetriNetUnfolder]: For 351054/356136 co-relation queries the response was YES. [2021-12-16 03:04:23,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 121570 conditions, 25157 events. 7684/25157 cut-off events. For 351054/356136 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 310082 event pairs, 890 based on Foata normal form. 917/23569 useless extension candidates. Maximal degree in co-relation 121519. Up to 4411 conditions per place. [2021-12-16 03:04:23,625 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 242 selfloop transitions, 125 changer transitions 0/584 dead transitions. [2021-12-16 03:04:23,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 584 transitions, 8309 flow [2021-12-16 03:04:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 03:04:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 03:04:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 751 transitions. [2021-12-16 03:04:23,627 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8612385321100917 [2021-12-16 03:04:23,627 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 751 transitions. [2021-12-16 03:04:23,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 751 transitions. [2021-12-16 03:04:23,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:23,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 751 transitions. [2021-12-16 03:04:23,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.875) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:23,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 109.0) internal successors, (981), 9 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:23,630 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 109.0) internal successors, (981), 9 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:23,630 INFO L186 Difference]: Start difference. First operand has 199 places, 380 transitions, 4961 flow. Second operand 8 states and 751 transitions. [2021-12-16 03:04:23,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 584 transitions, 8309 flow [2021-12-16 03:04:24,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 584 transitions, 8067 flow, removed 64 selfloop flow, removed 9 redundant places. [2021-12-16 03:04:24,571 INFO L242 Difference]: Finished difference. Result has 198 places, 433 transitions, 6032 flow [2021-12-16 03:04:24,572 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=4821, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6032, PETRI_PLACES=198, PETRI_TRANSITIONS=433} [2021-12-16 03:04:24,572 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 100 predicate places. [2021-12-16 03:04:24,572 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 433 transitions, 6032 flow [2021-12-16 03:04:24,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.4) internal successors, (904), 10 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:24,573 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:24,573 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:04:24,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-16 03:04:24,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 03:04:24,774 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:24,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1228151566, now seen corresponding path program 5 times [2021-12-16 03:04:24,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:24,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225742999] [2021-12-16 03:04:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:24,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 03:04:24,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225742999] [2021-12-16 03:04:24,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225742999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071139127] [2021-12-16 03:04:24,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:04:24,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:24,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:24,893 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) [2021-12-16 03:04:24,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 03:04:24,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-16 03:04:24,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:04:24,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 03:04:24,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 03:04:25,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 03:04:25,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071139127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:04:25,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:04:25,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2021-12-16 03:04:25,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338653249] [2021-12-16 03:04:25,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:04:25,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 03:04:25,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 03:04:25,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-12-16 03:04:25,446 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 109 [2021-12-16 03:04:25,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 433 transitions, 6032 flow. Second operand has 16 states, 16 states have (on average 82.0) internal successors, (1312), 16 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:25,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:25,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 109 [2021-12-16 03:04:25,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:34,766 INFO L129 PetriNetUnfolder]: 17885/47560 cut-off events. [2021-12-16 03:04:34,766 INFO L130 PetriNetUnfolder]: For 819051/824999 co-relation queries the response was YES. [2021-12-16 03:04:35,306 INFO L84 FinitePrefix]: Finished finitePrefix Result has 267732 conditions, 47560 events. 17885/47560 cut-off events. For 819051/824999 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 598834 event pairs, 657 based on Foata normal form. 2146/46155 useless extension candidates. Maximal degree in co-relation 267681. Up to 8312 conditions per place. [2021-12-16 03:04:35,502 INFO L132 encePairwiseOnDemand]: 95/109 looper letters, 166 selfloop transitions, 510 changer transitions 391/1166 dead transitions. [2021-12-16 03:04:35,502 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1166 transitions, 24474 flow [2021-12-16 03:04:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:04:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:04:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2657 transitions. [2021-12-16 03:04:35,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7863273157738976 [2021-12-16 03:04:35,506 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2657 transitions. [2021-12-16 03:04:35,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2657 transitions. [2021-12-16 03:04:35,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:35,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2657 transitions. [2021-12-16 03:04:35,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 85.70967741935483) internal successors, (2657), 31 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:35,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 109.0) internal successors, (3488), 32 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:35,521 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 109.0) internal successors, (3488), 32 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:35,523 INFO L186 Difference]: Start difference. First operand has 198 places, 433 transitions, 6032 flow. Second operand 31 states and 2657 transitions. [2021-12-16 03:04:35,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 1166 transitions, 24474 flow [2021-12-16 03:04:39,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1166 transitions, 23220 flow, removed 561 selfloop flow, removed 3 redundant places. [2021-12-16 03:04:39,186 INFO L242 Difference]: Finished difference. Result has 243 places, 700 transitions, 12682 flow [2021-12-16 03:04:39,187 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=5722, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=12682, PETRI_PLACES=243, PETRI_TRANSITIONS=700} [2021-12-16 03:04:39,187 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 145 predicate places. [2021-12-16 03:04:39,188 INFO L470 AbstractCegarLoop]: Abstraction has has 243 places, 700 transitions, 12682 flow [2021-12-16 03:04:39,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.0) internal successors, (1312), 16 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:39,188 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:04:39,189 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:04:39,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 03:04:39,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 03:04:39,412 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-16 03:04:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:04:39,413 INFO L85 PathProgramCache]: Analyzing trace with hash -486219961, now seen corresponding path program 6 times [2021-12-16 03:04:39,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:04:39,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24997151] [2021-12-16 03:04:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:04:39,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:04:39,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:04:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-16 03:04:39,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:04:39,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24997151] [2021-12-16 03:04:39,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24997151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:39,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143808682] [2021-12-16 03:04:39,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 03:04:39,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:04:39,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:04:39,524 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) [2021-12-16 03:04:39,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 03:04:39,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-16 03:04:39,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:04:39,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 03:04:39,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:04:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-16 03:04:39,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:04:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-16 03:04:39,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143808682] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 03:04:39,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 03:04:39,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2021-12-16 03:04:39,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130024805] [2021-12-16 03:04:39,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:04:39,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 03:04:39,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:04:39,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 03:04:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 03:04:39,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 109 [2021-12-16 03:04:40,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 700 transitions, 12682 flow. Second operand has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:40,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:04:40,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 109 [2021-12-16 03:04:40,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:04:51,054 INFO L129 PetriNetUnfolder]: 20467/48273 cut-off events. [2021-12-16 03:04:51,055 INFO L130 PetriNetUnfolder]: For 705377/706926 co-relation queries the response was YES. [2021-12-16 03:04:51,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277456 conditions, 48273 events. 20467/48273 cut-off events. For 705377/706926 co-relation queries the response was YES. Maximal size of possible extension queue 1998. Compared 566306 event pairs, 4016 based on Foata normal form. 190/45042 useless extension candidates. Maximal degree in co-relation 277387. Up to 24788 conditions per place. [2021-12-16 03:04:52,291 INFO L132 encePairwiseOnDemand]: 98/109 looper letters, 767 selfloop transitions, 162 changer transitions 2/1000 dead transitions. [2021-12-16 03:04:52,291 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 1000 transitions, 19497 flow [2021-12-16 03:04:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:04:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:04:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 555 transitions. [2021-12-16 03:04:52,292 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8486238532110092 [2021-12-16 03:04:52,292 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 555 transitions. [2021-12-16 03:04:52,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 555 transitions. [2021-12-16 03:04:52,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:04:52,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 555 transitions. [2021-12-16 03:04:52,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.5) internal successors, (555), 6 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:52,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:52,295 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 109.0) internal successors, (763), 7 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:04:52,295 INFO L186 Difference]: Start difference. First operand has 243 places, 700 transitions, 12682 flow. Second operand 6 states and 555 transitions. [2021-12-16 03:04:52,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 1000 transitions, 19497 flow