./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 e19ca921 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-dev-e19ca92 [2021-12-22 13:44:23,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:44:23,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:44:23,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:44:23,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:44:23,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:44:23,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:44:23,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:44:23,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:44:23,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:44:23,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:44:23,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:44:23,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:44:23,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:44:23,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:44:23,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:44:23,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:44:23,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:44:23,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:44:23,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:44:23,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:44:23,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:44:23,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:44:23,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:44:23,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:44:23,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:44:23,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:44:23,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:44:23,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:44:23,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:44:23,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:44:23,147 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:44:23,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:44:23,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:44:23,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:44:23,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:44:23,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:44:23,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:44:23,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:44:23,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:44:23,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:44:23,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:44:23,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:44:23,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:44:23,177 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:44:23,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:44:23,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:44:23,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:44:23,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:44:23,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:44:23,179 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:44:23,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:44:23,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:44:23,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:44:23,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:44:23,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:44:23,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:44:23,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:44:23,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:44:23,181 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:44:23,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:44:23,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:44:23,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:44:23,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:44:23,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:44:23,182 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:44:23,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:44:23,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:44:23,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:44:23,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:44:23,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:44:23,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:44:23,183 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:44:23,184 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:44:23,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:44:23,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:44:23,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f696f3d7a078e1a0d9bb5ce793945c7092990826a45e57529562474d0b18f4a [2021-12-22 13:44:23,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:44:23,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:44:23,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:44:23,400 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:44:23,401 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:44:23,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2021-12-22 13:44:23,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7875785a/a3999db11b6a4682a9642aa4d750765f/FLAGb85c03861 [2021-12-22 13:44:23,817 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:44:23,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-5.wvr.c [2021-12-22 13:44:23,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7875785a/a3999db11b6a4682a9642aa4d750765f/FLAGb85c03861 [2021-12-22 13:44:23,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7875785a/a3999db11b6a4682a9642aa4d750765f [2021-12-22 13:44:23,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:44:23,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:44:23,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:44:23,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:44:23,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:44:23,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:44:23" (1/1) ... [2021-12-22 13:44:23,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4905aa4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:23, skipping insertion in model container [2021-12-22 13:44:23,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:44:23" (1/1) ... [2021-12-22 13:44:23,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:44:23,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:44:24,011 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] [2021-12-22 13:44:24,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:44:24,019 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:44:24,035 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] [2021-12-22 13:44:24,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:44:24,045 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:44:24,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24 WrapperNode [2021-12-22 13:44:24,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:44:24,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:44:24,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:44:24,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:44:24,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,101 INFO L137 Inliner]: procedures = 22, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 143 [2021-12-22 13:44:24,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:44:24,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:44:24,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:44:24,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:44:24,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:44:24,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:44:24,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:44:24,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:44:24,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (1/1) ... [2021-12-22 13:44:24,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:44:24,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:44:24,175 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) [2021-12-22 13:44:24,177 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 [2021-12-22 13:44:24,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:44:24,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-22 13:44:24,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-22 13:44:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-22 13:44:24,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-22 13:44:24,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-22 13:44:24,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-22 13:44:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:44:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:44:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:44:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:44:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:44:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:44:24,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:44:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:44:24,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:44:24,212 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:44:24,310 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:44:24,311 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:44:24,554 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:44:24,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:44:24,630 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:44:24,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:44:24 BoogieIcfgContainer [2021-12-22 13:44:24,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:44:24,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:44:24,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:44:24,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:44:24,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:44:23" (1/3) ... [2021-12-22 13:44:24,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a5580b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:44:24, skipping insertion in model container [2021-12-22 13:44:24,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:44:24" (2/3) ... [2021-12-22 13:44:24,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a5580b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:44:24, skipping insertion in model container [2021-12-22 13:44:24,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:44:24" (3/3) ... [2021-12-22 13:44:24,639 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-misc-5.wvr.c [2021-12-22 13:44:24,642 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:44:24,642 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:44:24,642 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:44:24,643 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:44:24,680 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,680 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,681 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,681 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,681 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,682 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,683 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,683 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,684 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,684 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,684 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,684 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,685 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,685 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,685 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,686 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,686 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,690 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,691 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,691 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,691 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,692 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,693 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,693 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,693 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,694 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,695 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,697 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,698 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,698 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,698 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,698 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,699 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,699 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,699 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,699 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,700 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,700 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,700 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,700 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,701 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,701 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,701 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,701 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,702 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,703 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,703 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,703 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,703 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,704 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,707 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,708 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,708 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~nondet1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,709 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,710 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,711 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,713 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,713 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,713 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,714 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,714 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,714 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,715 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,715 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,715 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,719 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,719 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:44:24,722 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-22 13:44:24,756 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:44:24,761 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 [2021-12-22 13:44:24,762 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-22 13:44:24,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 112 places, 109 transitions, 242 flow [2021-12-22 13:44:24,818 INFO L129 PetriNetUnfolder]: 7/106 cut-off events. [2021-12-22 13:44:24,819 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-22 13:44:24,821 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. [2021-12-22 13:44:24,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 109 transitions, 242 flow [2021-12-22 13:44:24,824 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 95 transitions, 208 flow [2021-12-22 13:44:24,839 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-12-22 13:44:24,840 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-22 13:44:24,840 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:24,840 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] [2021-12-22 13:44:24,841 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:24,844 INFO L85 PathProgramCache]: Analyzing trace with hash 851355942, now seen corresponding path program 1 times [2021-12-22 13:44:24,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:24,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536787529] [2021-12-22 13:44:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:24,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:24,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:24,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536787529] [2021-12-22 13:44:24,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536787529] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:44:24,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:44:24,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:44:24,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344906757] [2021-12-22 13:44:24,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:44:24,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:44:24,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:24,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:44:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:44:25,000 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 109 [2021-12-22 13:44:25,003 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) [2021-12-22 13:44:25,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:25,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 109 [2021-12-22 13:44:25,004 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:25,080 INFO L129 PetriNetUnfolder]: 36/184 cut-off events. [2021-12-22 13:44:25,080 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-12-22 13:44:25,082 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. [2021-12-22 13:44:25,085 INFO L132 encePairwiseOnDemand]: 106/109 looper letters, 10 selfloop transitions, 0 changer transitions 1/92 dead transitions. [2021-12-22 13:44:25,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 92 transitions, 222 flow [2021-12-22 13:44:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:44:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:44:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 203 transitions. [2021-12-22 13:44:25,098 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9311926605504587 [2021-12-22 13:44:25,098 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 203 transitions. [2021-12-22 13:44:25,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 203 transitions. [2021-12-22 13:44:25,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:25,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 203 transitions. [2021-12-22 13:44:25,107 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) [2021-12-22 13:44:25,111 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) [2021-12-22 13:44:25,112 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) [2021-12-22 13:44:25,113 INFO L186 Difference]: Start difference. First operand has 98 places, 95 transitions, 208 flow. Second operand 2 states and 203 transitions. [2021-12-22 13:44:25,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 92 transitions, 222 flow [2021-12-22 13:44:25,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-22 13:44:25,119 INFO L242 Difference]: Finished difference. Result has 93 places, 91 transitions, 188 flow [2021-12-22 13:44:25,121 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} [2021-12-22 13:44:25,125 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, -5 predicate places. [2021-12-22 13:44:25,125 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 188 flow [2021-12-22 13:44:25,126 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) [2021-12-22 13:44:25,126 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:25,127 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] [2021-12-22 13:44:25,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:44:25,127 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:25,128 INFO L85 PathProgramCache]: Analyzing trace with hash -283457211, now seen corresponding path program 1 times [2021-12-22 13:44:25,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:25,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123086881] [2021-12-22 13:44:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:25,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:25,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:25,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123086881] [2021-12-22 13:44:25,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123086881] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:44:25,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:44:25,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:44:25,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427696505] [2021-12-22 13:44:25,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:44:25,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:44:25,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:44:25,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:44:25,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 109 [2021-12-22 13:44:25,417 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) [2021-12-22 13:44:25,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:25,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 109 [2021-12-22 13:44:25,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:25,547 INFO L129 PetriNetUnfolder]: 95/279 cut-off events. [2021-12-22 13:44:25,548 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-22 13:44:25,550 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. [2021-12-22 13:44:25,552 INFO L132 encePairwiseOnDemand]: 103/109 looper letters, 33 selfloop transitions, 6 changer transitions 0/107 dead transitions. [2021-12-22 13:44:25,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 107 transitions, 300 flow [2021-12-22 13:44:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:44:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:44:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 526 transitions. [2021-12-22 13:44:25,557 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8042813455657493 [2021-12-22 13:44:25,557 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 526 transitions. [2021-12-22 13:44:25,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 526 transitions. [2021-12-22 13:44:25,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:25,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 526 transitions. [2021-12-22 13:44:25,560 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) [2021-12-22 13:44:25,562 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) [2021-12-22 13:44:25,562 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) [2021-12-22 13:44:25,562 INFO L186 Difference]: Start difference. First operand has 93 places, 91 transitions, 188 flow. Second operand 6 states and 526 transitions. [2021-12-22 13:44:25,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 107 transitions, 300 flow [2021-12-22 13:44:25,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 107 transitions, 300 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:44:25,567 INFO L242 Difference]: Finished difference. Result has 99 places, 93 transitions, 213 flow [2021-12-22 13:44:25,568 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} [2021-12-22 13:44:25,568 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 1 predicate places. [2021-12-22 13:44:25,568 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 213 flow [2021-12-22 13:44:25,569 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) [2021-12-22 13:44:25,570 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:25,572 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] [2021-12-22 13:44:25,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:44:25,573 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:25,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:25,574 INFO L85 PathProgramCache]: Analyzing trace with hash -337069583, now seen corresponding path program 2 times [2021-12-22 13:44:25,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:25,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758808795] [2021-12-22 13:44:25,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:25,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:25,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758808795] [2021-12-22 13:44:25,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758808795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:44:25,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:44:25,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:44:25,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548643220] [2021-12-22 13:44:25,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:44:25,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:44:25,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:25,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:44:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:44:25,726 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 109 [2021-12-22 13:44:25,726 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) [2021-12-22 13:44:25,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:25,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 109 [2021-12-22 13:44:25,727 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:25,863 INFO L129 PetriNetUnfolder]: 99/326 cut-off events. [2021-12-22 13:44:25,864 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2021-12-22 13:44:25,865 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. [2021-12-22 13:44:25,867 INFO L132 encePairwiseOnDemand]: 101/109 looper letters, 36 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2021-12-22 13:44:25,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 112 transitions, 341 flow [2021-12-22 13:44:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:44:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:44:25,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 612 transitions. [2021-12-22 13:44:25,869 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8020969855832241 [2021-12-22 13:44:25,869 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 612 transitions. [2021-12-22 13:44:25,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 612 transitions. [2021-12-22 13:44:25,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:25,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 612 transitions. [2021-12-22 13:44:25,870 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) [2021-12-22 13:44:25,872 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) [2021-12-22 13:44:25,872 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) [2021-12-22 13:44:25,872 INFO L186 Difference]: Start difference. First operand has 99 places, 93 transitions, 213 flow. Second operand 7 states and 612 transitions. [2021-12-22 13:44:25,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 112 transitions, 341 flow [2021-12-22 13:44:25,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 112 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-22 13:44:25,877 INFO L242 Difference]: Finished difference. Result has 104 places, 95 transitions, 239 flow [2021-12-22 13:44:25,878 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} [2021-12-22 13:44:25,879 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 6 predicate places. [2021-12-22 13:44:25,879 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 95 transitions, 239 flow [2021-12-22 13:44:25,880 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) [2021-12-22 13:44:25,880 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:25,880 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] [2021-12-22 13:44:25,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:44:25,881 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:25,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:25,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1355540335, now seen corresponding path program 3 times [2021-12-22 13:44:25,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:25,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110506072] [2021-12-22 13:44:25,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:25,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:26,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:26,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110506072] [2021-12-22 13:44:26,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110506072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:44:26,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:44:26,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:44:26,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087898918] [2021-12-22 13:44:26,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:44:26,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:44:26,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:44:26,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:44:26,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 109 [2021-12-22 13:44:26,041 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) [2021-12-22 13:44:26,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:26,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 109 [2021-12-22 13:44:26,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:26,198 INFO L129 PetriNetUnfolder]: 224/608 cut-off events. [2021-12-22 13:44:26,198 INFO L130 PetriNetUnfolder]: For 248/248 co-relation queries the response was YES. [2021-12-22 13:44:26,200 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. [2021-12-22 13:44:26,202 INFO L132 encePairwiseOnDemand]: 98/109 looper letters, 33 selfloop transitions, 7 changer transitions 36/142 dead transitions. [2021-12-22 13:44:26,203 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 142 transitions, 539 flow [2021-12-22 13:44:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:44:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:44:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 784 transitions. [2021-12-22 13:44:26,205 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.799184505606524 [2021-12-22 13:44:26,205 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 784 transitions. [2021-12-22 13:44:26,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 784 transitions. [2021-12-22 13:44:26,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:26,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 784 transitions. [2021-12-22 13:44:26,207 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) [2021-12-22 13:44:26,208 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) [2021-12-22 13:44:26,209 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) [2021-12-22 13:44:26,209 INFO L186 Difference]: Start difference. First operand has 104 places, 95 transitions, 239 flow. Second operand 9 states and 784 transitions. [2021-12-22 13:44:26,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 142 transitions, 539 flow [2021-12-22 13:44:26,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 142 transitions, 526 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-22 13:44:26,212 INFO L242 Difference]: Finished difference. Result has 113 places, 97 transitions, 281 flow [2021-12-22 13:44:26,212 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} [2021-12-22 13:44:26,213 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 15 predicate places. [2021-12-22 13:44:26,213 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 281 flow [2021-12-22 13:44:26,213 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) [2021-12-22 13:44:26,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:26,214 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] [2021-12-22 13:44:26,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:44:26,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2035553460, now seen corresponding path program 1 times [2021-12-22 13:44:26,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:26,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731275604] [2021-12-22 13:44:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:26,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:26,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731275604] [2021-12-22 13:44:26,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731275604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:44:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5244193] [2021-12-22 13:44:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:26,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:26,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:44:26,282 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) [2021-12-22 13:44:26,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:44:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:44:26,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:44:26,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:26,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:44:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:26,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5244193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:44:26,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:44:26,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-22 13:44:26,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227847404] [2021-12-22 13:44:26,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:44:26,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:44:26,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:26,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:44:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:44:26,594 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 109 [2021-12-22 13:44:26,595 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) [2021-12-22 13:44:26,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:26,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 109 [2021-12-22 13:44:26,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:26,733 INFO L129 PetriNetUnfolder]: 323/827 cut-off events. [2021-12-22 13:44:26,734 INFO L130 PetriNetUnfolder]: For 656/662 co-relation queries the response was YES. [2021-12-22 13:44:26,736 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. [2021-12-22 13:44:26,739 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 55 selfloop transitions, 18 changer transitions 6/148 dead transitions. [2021-12-22 13:44:26,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 678 flow [2021-12-22 13:44:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:44:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:44:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2021-12-22 13:44:26,741 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854521625163827 [2021-12-22 13:44:26,741 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2021-12-22 13:44:26,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2021-12-22 13:44:26,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:26,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2021-12-22 13:44:26,743 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) [2021-12-22 13:44:26,744 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) [2021-12-22 13:44:26,744 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) [2021-12-22 13:44:26,744 INFO L186 Difference]: Start difference. First operand has 113 places, 97 transitions, 281 flow. Second operand 7 states and 652 transitions. [2021-12-22 13:44:26,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 678 flow [2021-12-22 13:44:26,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 650 flow, removed 8 selfloop flow, removed 5 redundant places. [2021-12-22 13:44:26,749 INFO L242 Difference]: Finished difference. Result has 116 places, 110 transitions, 420 flow [2021-12-22 13:44:26,749 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} [2021-12-22 13:44:26,749 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 18 predicate places. [2021-12-22 13:44:26,749 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 110 transitions, 420 flow [2021-12-22 13:44:26,750 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) [2021-12-22 13:44:26,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:26,750 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] [2021-12-22 13:44:26,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:44:26,965 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 [2021-12-22 13:44:26,965 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:26,966 INFO L85 PathProgramCache]: Analyzing trace with hash 60102788, now seen corresponding path program 2 times [2021-12-22 13:44:26,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:26,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865993222] [2021-12-22 13:44:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:26,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:27,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:27,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865993222] [2021-12-22 13:44:27,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865993222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:44:27,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:44:27,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:44:27,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654416132] [2021-12-22 13:44:27,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:44:27,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:44:27,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:44:27,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:44:27,051 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 109 [2021-12-22 13:44:27,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 110 transitions, 420 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) [2021-12-22 13:44:27,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:27,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 109 [2021-12-22 13:44:27,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:27,125 INFO L129 PetriNetUnfolder]: 174/629 cut-off events. [2021-12-22 13:44:27,125 INFO L130 PetriNetUnfolder]: For 889/916 co-relation queries the response was YES. [2021-12-22 13:44:27,128 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 629 events. 174/629 cut-off events. For 889/916 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3518 event pairs, 21 based on Foata normal form. 28/583 useless extension candidates. Maximal degree in co-relation 1451. Up to 107 conditions per place. [2021-12-22 13:44:27,131 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 21 selfloop transitions, 6 changer transitions 0/119 dead transitions. [2021-12-22 13:44:27,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 505 flow [2021-12-22 13:44:27,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:44:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:44:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 465 transitions. [2021-12-22 13:44:27,132 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8532110091743119 [2021-12-22 13:44:27,132 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 465 transitions. [2021-12-22 13:44:27,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 465 transitions. [2021-12-22 13:44:27,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:27,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 465 transitions. [2021-12-22 13:44:27,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.0) internal successors, (465), 5 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:27,134 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) [2021-12-22 13:44:27,134 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) [2021-12-22 13:44:27,134 INFO L186 Difference]: Start difference. First operand has 116 places, 110 transitions, 420 flow. Second operand 5 states and 465 transitions. [2021-12-22 13:44:27,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 505 flow [2021-12-22 13:44:27,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 501 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:44:27,139 INFO L242 Difference]: Finished difference. Result has 120 places, 111 transitions, 440 flow [2021-12-22 13:44:27,139 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=440, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2021-12-22 13:44:27,139 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 22 predicate places. [2021-12-22 13:44:27,140 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 440 flow [2021-12-22 13:44:27,140 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) [2021-12-22 13:44:27,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:27,140 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] [2021-12-22 13:44:27,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:44:27,140 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1754557135, now seen corresponding path program 1 times [2021-12-22 13:44:27,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:27,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930406012] [2021-12-22 13:44:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:27,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:27,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:27,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930406012] [2021-12-22 13:44:27,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930406012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:44:27,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357091002] [2021-12-22 13:44:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:27,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:27,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:44:27,212 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) [2021-12-22 13:44:27,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:44:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:27,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:44:27,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:44:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:27,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:44:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:27,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357091002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:44:27,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:44:27,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-22 13:44:27,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839607414] [2021-12-22 13:44:27,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:44:27,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:44:27,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:44:27,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:44:27,526 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 109 [2021-12-22 13:44:27,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 440 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) [2021-12-22 13:44:27,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:27,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 109 [2021-12-22 13:44:27,527 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:27,705 INFO L129 PetriNetUnfolder]: 402/1166 cut-off events. [2021-12-22 13:44:27,705 INFO L130 PetriNetUnfolder]: For 2293/2329 co-relation queries the response was YES. [2021-12-22 13:44:27,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3319 conditions, 1166 events. 402/1166 cut-off events. For 2293/2329 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7554 event pairs, 41 based on Foata normal form. 45/1115 useless extension candidates. Maximal degree in co-relation 3302. Up to 313 conditions per place. [2021-12-22 13:44:27,714 INFO L132 encePairwiseOnDemand]: 104/109 looper letters, 68 selfloop transitions, 19 changer transitions 5/165 dead transitions. [2021-12-22 13:44:27,715 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 165 transitions, 993 flow [2021-12-22 13:44:27,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:44:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-22 13:44:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 566 transitions. [2021-12-22 13:44:27,717 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8654434250764526 [2021-12-22 13:44:27,717 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 566 transitions. [2021-12-22 13:44:27,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 566 transitions. [2021-12-22 13:44:27,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:27,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 566 transitions. [2021-12-22 13:44:27,718 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) [2021-12-22 13:44:27,719 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) [2021-12-22 13:44:27,719 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) [2021-12-22 13:44:27,720 INFO L186 Difference]: Start difference. First operand has 120 places, 111 transitions, 440 flow. Second operand 6 states and 566 transitions. [2021-12-22 13:44:27,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 165 transitions, 993 flow [2021-12-22 13:44:27,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 165 transitions, 982 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-22 13:44:27,728 INFO L242 Difference]: Finished difference. Result has 126 places, 124 transitions, 635 flow [2021-12-22 13:44:27,729 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=635, PETRI_PLACES=126, PETRI_TRANSITIONS=124} [2021-12-22 13:44:27,729 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 28 predicate places. [2021-12-22 13:44:27,730 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 124 transitions, 635 flow [2021-12-22 13:44:27,730 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) [2021-12-22 13:44:27,730 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:27,730 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] [2021-12-22 13:44:27,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:44:27,948 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 [2021-12-22 13:44:27,948 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1404627543, now seen corresponding path program 2 times [2021-12-22 13:44:27,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:27,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814398879] [2021-12-22 13:44:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:27,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:28,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:28,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814398879] [2021-12-22 13:44:28,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814398879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:44:28,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:44:28,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:44:28,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498708534] [2021-12-22 13:44:28,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:44:28,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:44:28,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:44:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:44:28,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 109 [2021-12-22 13:44:28,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 124 transitions, 635 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) [2021-12-22 13:44:28,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:28,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 109 [2021-12-22 13:44:28,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:28,162 INFO L129 PetriNetUnfolder]: 225/981 cut-off events. [2021-12-22 13:44:28,162 INFO L130 PetriNetUnfolder]: For 2345/2403 co-relation queries the response was YES. [2021-12-22 13:44:28,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2637 conditions, 981 events. 225/981 cut-off events. For 2345/2403 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6826 event pairs, 31 based on Foata normal form. 52/927 useless extension candidates. Maximal degree in co-relation 2617. Up to 171 conditions per place. [2021-12-22 13:44:28,170 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 22 selfloop transitions, 6 changer transitions 0/133 dead transitions. [2021-12-22 13:44:28,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 133 transitions, 729 flow [2021-12-22 13:44:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:44:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:44:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 464 transitions. [2021-12-22 13:44:28,171 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8513761467889909 [2021-12-22 13:44:28,171 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 464 transitions. [2021-12-22 13:44:28,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 464 transitions. [2021-12-22 13:44:28,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:28,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 464 transitions. [2021-12-22 13:44:28,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:28,173 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) [2021-12-22 13:44:28,174 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) [2021-12-22 13:44:28,174 INFO L186 Difference]: Start difference. First operand has 126 places, 124 transitions, 635 flow. Second operand 5 states and 464 transitions. [2021-12-22 13:44:28,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 133 transitions, 729 flow [2021-12-22 13:44:28,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 133 transitions, 729 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:44:28,181 INFO L242 Difference]: Finished difference. Result has 131 places, 125 transitions, 659 flow [2021-12-22 13:44:28,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=659, PETRI_PLACES=131, PETRI_TRANSITIONS=125} [2021-12-22 13:44:28,184 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 33 predicate places. [2021-12-22 13:44:28,184 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 125 transitions, 659 flow [2021-12-22 13:44:28,184 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) [2021-12-22 13:44:28,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:28,185 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] [2021-12-22 13:44:28,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:44:28,185 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:28,185 INFO L85 PathProgramCache]: Analyzing trace with hash -458505152, now seen corresponding path program 1 times [2021-12-22 13:44:28,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:28,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252245475] [2021-12-22 13:44:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:28,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:28,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252245475] [2021-12-22 13:44:28,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252245475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:44:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491442805] [2021-12-22 13:44:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:28,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:44:28,274 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) [2021-12-22 13:44:28,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:44:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:28,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:44:28,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:44:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:28,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:44:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:28,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491442805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:44:28,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:44:28,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2021-12-22 13:44:28,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081889822] [2021-12-22 13:44:28,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:44:28,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:44:28,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:44:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:44:28,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 109 [2021-12-22 13:44:28,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 125 transitions, 659 flow. Second operand has 14 states, 14 states have (on average 81.78571428571429) internal successors, (1145), 14 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:28,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:28,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 109 [2021-12-22 13:44:28,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:29,261 INFO L129 PetriNetUnfolder]: 917/2722 cut-off events. [2021-12-22 13:44:29,262 INFO L130 PetriNetUnfolder]: For 9707/9931 co-relation queries the response was YES. [2021-12-22 13:44:29,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9082 conditions, 2722 events. 917/2722 cut-off events. For 9707/9931 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23012 event pairs, 44 based on Foata normal form. 120/2619 useless extension candidates. Maximal degree in co-relation 9060. Up to 348 conditions per place. [2021-12-22 13:44:29,280 INFO L132 encePairwiseOnDemand]: 95/109 looper letters, 88 selfloop transitions, 39 changer transitions 102/306 dead transitions. [2021-12-22 13:44:29,281 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 306 transitions, 2660 flow [2021-12-22 13:44:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 13:44:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-22 13:44:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1793 transitions. [2021-12-22 13:44:29,285 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7833114897335081 [2021-12-22 13:44:29,285 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1793 transitions. [2021-12-22 13:44:29,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1793 transitions. [2021-12-22 13:44:29,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:29,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1793 transitions. [2021-12-22 13:44:29,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:29,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 109.0) internal successors, (2398), 22 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:29,292 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 109.0) internal successors, (2398), 22 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:29,292 INFO L186 Difference]: Start difference. First operand has 131 places, 125 transitions, 659 flow. Second operand 21 states and 1793 transitions. [2021-12-22 13:44:29,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 306 transitions, 2660 flow [2021-12-22 13:44:29,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 306 transitions, 2637 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-22 13:44:29,307 INFO L242 Difference]: Finished difference. Result has 161 places, 152 transitions, 1077 flow [2021-12-22 13:44:29,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1077, PETRI_PLACES=161, PETRI_TRANSITIONS=152} [2021-12-22 13:44:29,308 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 63 predicate places. [2021-12-22 13:44:29,308 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 152 transitions, 1077 flow [2021-12-22 13:44:29,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.78571428571429) internal successors, (1145), 14 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:29,309 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:29,309 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] [2021-12-22 13:44:29,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 13:44:29,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:29,547 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:29,547 INFO L85 PathProgramCache]: Analyzing trace with hash 118312707, now seen corresponding path program 2 times [2021-12-22 13:44:29,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:29,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541538394] [2021-12-22 13:44:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:29,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:44:29,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:29,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541538394] [2021-12-22 13:44:29,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541538394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:44:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77863843] [2021-12-22 13:44:29,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 13:44:29,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:44:29,648 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) [2021-12-22 13:44:29,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:44:29,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 13:44:29,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:44:29,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:44:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:44:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 13:44:29,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:44:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 13:44:29,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77863843] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:44:29,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:44:29,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2021-12-22 13:44:29,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514240684] [2021-12-22 13:44:29,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:44:29,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:44:29,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:29,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:44:29,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:44:29,974 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 109 [2021-12-22 13:44:29,975 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 152 transitions, 1077 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) [2021-12-22 13:44:29,975 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:29,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 109 [2021-12-22 13:44:29,975 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:30,506 INFO L129 PetriNetUnfolder]: 1210/3137 cut-off events. [2021-12-22 13:44:30,507 INFO L130 PetriNetUnfolder]: For 19031/19143 co-relation queries the response was YES. [2021-12-22 13:44:30,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12947 conditions, 3137 events. 1210/3137 cut-off events. For 19031/19143 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25830 event pairs, 15 based on Foata normal form. 36/2949 useless extension candidates. Maximal degree in co-relation 12912. Up to 992 conditions per place. [2021-12-22 13:44:30,572 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 123 selfloop transitions, 64 changer transitions 0/256 dead transitions. [2021-12-22 13:44:30,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 256 transitions, 2606 flow [2021-12-22 13:44:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:44:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-22 13:44:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2021-12-22 13:44:30,574 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.854521625163827 [2021-12-22 13:44:30,574 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2021-12-22 13:44:30,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2021-12-22 13:44:30,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:30,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2021-12-22 13:44:30,575 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) [2021-12-22 13:44:30,576 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) [2021-12-22 13:44:30,577 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) [2021-12-22 13:44:30,577 INFO L186 Difference]: Start difference. First operand has 161 places, 152 transitions, 1077 flow. Second operand 7 states and 652 transitions. [2021-12-22 13:44:30,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 256 transitions, 2606 flow [2021-12-22 13:44:30,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 256 transitions, 2398 flow, removed 101 selfloop flow, removed 8 redundant places. [2021-12-22 13:44:30,621 INFO L242 Difference]: Finished difference. Result has 156 places, 197 transitions, 1854 flow [2021-12-22 13:44:30,622 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1854, PETRI_PLACES=156, PETRI_TRANSITIONS=197} [2021-12-22 13:44:30,622 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 58 predicate places. [2021-12-22 13:44:30,622 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 197 transitions, 1854 flow [2021-12-22 13:44:30,622 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) [2021-12-22 13:44:30,623 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:30,623 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] [2021-12-22 13:44:30,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:44:30,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:30,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:30,859 INFO L85 PathProgramCache]: Analyzing trace with hash -170804443, now seen corresponding path program 3 times [2021-12-22 13:44:30,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:30,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451697019] [2021-12-22 13:44:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:30,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:44:31,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451697019] [2021-12-22 13:44:31,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451697019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:44:31,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596848691] [2021-12-22 13:44:31,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 13:44:31,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:31,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:44:31,016 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) [2021-12-22 13:44:31,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:44:31,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-22 13:44:31,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:44:31,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-22 13:44:31,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:44:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:31,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:44:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:44:31,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596848691] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:44:31,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:44:31,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 18 [2021-12-22 13:44:31,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319883777] [2021-12-22 13:44:31,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:44:31,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:44:31,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:31,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:44:31,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:44:31,589 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 109 [2021-12-22 13:44:31,591 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 197 transitions, 1854 flow. Second operand has 18 states, 18 states have (on average 80.5) internal successors, (1449), 18 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:31,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:31,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 109 [2021-12-22 13:44:31,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:33,400 INFO L129 PetriNetUnfolder]: 3274/9092 cut-off events. [2021-12-22 13:44:33,400 INFO L130 PetriNetUnfolder]: For 62835/63422 co-relation queries the response was YES. [2021-12-22 13:44:33,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39699 conditions, 9092 events. 3274/9092 cut-off events. For 62835/63422 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 94556 event pairs, 68 based on Foata normal form. 259/8589 useless extension candidates. Maximal degree in co-relation 39663. Up to 1467 conditions per place. [2021-12-22 13:44:33,501 INFO L132 encePairwiseOnDemand]: 94/109 looper letters, 276 selfloop transitions, 260 changer transitions 167/800 dead transitions. [2021-12-22 13:44:33,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 800 transitions, 11420 flow [2021-12-22 13:44:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-22 13:44:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-12-22 13:44:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3636 transitions. [2021-12-22 13:44:33,507 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7757627480264562 [2021-12-22 13:44:33,507 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3636 transitions. [2021-12-22 13:44:33,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3636 transitions. [2021-12-22 13:44:33,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:33,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3636 transitions. [2021-12-22 13:44:33,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 84.55813953488372) internal successors, (3636), 43 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:33,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 109.0) internal successors, (4796), 44 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:33,573 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 109.0) internal successors, (4796), 44 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:33,573 INFO L186 Difference]: Start difference. First operand has 156 places, 197 transitions, 1854 flow. Second operand 43 states and 3636 transitions. [2021-12-22 13:44:33,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 800 transitions, 11420 flow [2021-12-22 13:44:33,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 800 transitions, 11308 flow, removed 56 selfloop flow, removed 0 redundant places. [2021-12-22 13:44:33,745 INFO L242 Difference]: Finished difference. Result has 216 places, 415 transitions, 5077 flow [2021-12-22 13:44:33,746 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=5077, PETRI_PLACES=216, PETRI_TRANSITIONS=415} [2021-12-22 13:44:33,746 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 118 predicate places. [2021-12-22 13:44:33,747 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 415 transitions, 5077 flow [2021-12-22 13:44:33,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 80.5) internal successors, (1449), 18 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:33,747 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:33,747 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] [2021-12-22 13:44:33,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 13:44:33,965 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,SelfDestructingSolverStorable10 [2021-12-22 13:44:33,966 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:33,966 INFO L85 PathProgramCache]: Analyzing trace with hash 840797718, now seen corresponding path program 1 times [2021-12-22 13:44:33,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:33,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337657208] [2021-12-22 13:44:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:33,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:44:34,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:34,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337657208] [2021-12-22 13:44:34,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337657208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:44:34,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61352840] [2021-12-22 13:44:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:34,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:34,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:44:34,044 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) [2021-12-22 13:44:34,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:44:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 13:44:34,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:44:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:44:34,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:44:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:44:34,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61352840] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:44:34,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:44:34,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 18 [2021-12-22 13:44:34,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323619834] [2021-12-22 13:44:34,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:44:34,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:44:34,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:44:34,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:44:34,460 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 109 [2021-12-22 13:44:34,462 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 415 transitions, 5077 flow. Second operand has 18 states, 18 states have (on average 80.5) internal successors, (1449), 18 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:34,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:34,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 109 [2021-12-22 13:44:34,462 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:37,996 INFO L129 PetriNetUnfolder]: 7439/18749 cut-off events. [2021-12-22 13:44:37,997 INFO L130 PetriNetUnfolder]: For 236377/237291 co-relation queries the response was YES. [2021-12-22 13:44:38,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97347 conditions, 18749 events. 7439/18749 cut-off events. For 236377/237291 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 205111 event pairs, 379 based on Foata normal form. 306/17398 useless extension candidates. Maximal degree in co-relation 97292. Up to 3087 conditions per place. [2021-12-22 13:44:38,264 INFO L132 encePairwiseOnDemand]: 95/109 looper letters, 646 selfloop transitions, 152 changer transitions 146/1075 dead transitions. [2021-12-22 13:44:38,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1075 transitions, 15928 flow [2021-12-22 13:44:38,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:44:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:44:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1621 transitions. [2021-12-22 13:44:38,266 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7827136648961854 [2021-12-22 13:44:38,266 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1621 transitions. [2021-12-22 13:44:38,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1621 transitions. [2021-12-22 13:44:38,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:38,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1621 transitions. [2021-12-22 13:44:38,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.3157894736842) internal successors, (1621), 19 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:38,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 109.0) internal successors, (2180), 20 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:38,271 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 109.0) internal successors, (2180), 20 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:38,272 INFO L186 Difference]: Start difference. First operand has 216 places, 415 transitions, 5077 flow. Second operand 19 states and 1621 transitions. [2021-12-22 13:44:38,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1075 transitions, 15928 flow [2021-12-22 13:44:39,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1075 transitions, 15114 flow, removed 395 selfloop flow, removed 11 redundant places. [2021-12-22 13:44:39,147 INFO L242 Difference]: Finished difference. Result has 224 places, 512 transitions, 6785 flow [2021-12-22 13:44:39,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6785, PETRI_PLACES=224, PETRI_TRANSITIONS=512} [2021-12-22 13:44:39,148 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 126 predicate places. [2021-12-22 13:44:39,148 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 512 transitions, 6785 flow [2021-12-22 13:44:39,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 80.5) internal successors, (1449), 18 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:39,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:39,149 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:44:39,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 13:44:39,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:39,349 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:39,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1333707901, now seen corresponding path program 1 times [2021-12-22 13:44:39,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:39,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375864621] [2021-12-22 13:44:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:39,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:44:39,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:39,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375864621] [2021-12-22 13:44:39,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375864621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:44:39,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719794020] [2021-12-22 13:44:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:39,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:44:39,440 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) [2021-12-22 13:44:39,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:44:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:39,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 13:44:39,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:44:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:44:39,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:44:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:44:39,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719794020] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:44:39,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:44:39,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 15 [2021-12-22 13:44:39,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833204688] [2021-12-22 13:44:39,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:44:39,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 13:44:39,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:39,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 13:44:39,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:44:39,858 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 109 [2021-12-22 13:44:39,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 512 transitions, 6785 flow. Second operand has 15 states, 15 states have (on average 81.93333333333334) internal successors, (1229), 15 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:39,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:39,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 109 [2021-12-22 13:44:39,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:45,542 INFO L129 PetriNetUnfolder]: 10922/27413 cut-off events. [2021-12-22 13:44:45,542 INFO L130 PetriNetUnfolder]: For 419336/421644 co-relation queries the response was YES. [2021-12-22 13:44:45,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146776 conditions, 27413 events. 10922/27413 cut-off events. For 419336/421644 co-relation queries the response was YES. Maximal size of possible extension queue 1384. Compared 316758 event pairs, 228 based on Foata normal form. 460/25853 useless extension candidates. Maximal degree in co-relation 146718. Up to 4399 conditions per place. [2021-12-22 13:44:45,895 INFO L132 encePairwiseOnDemand]: 96/109 looper letters, 271 selfloop transitions, 576 changer transitions 383/1363 dead transitions. [2021-12-22 13:44:45,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1363 transitions, 22233 flow [2021-12-22 13:44:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-22 13:44:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-12-22 13:44:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2236 transitions. [2021-12-22 13:44:45,899 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7889908256880734 [2021-12-22 13:44:45,899 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2236 transitions. [2021-12-22 13:44:45,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2236 transitions. [2021-12-22 13:44:45,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:45,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2236 transitions. [2021-12-22 13:44:45,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 86.0) internal successors, (2236), 26 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:45,914 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) [2021-12-22 13:44:45,916 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) [2021-12-22 13:44:45,916 INFO L186 Difference]: Start difference. First operand has 224 places, 512 transitions, 6785 flow. Second operand 26 states and 2236 transitions. [2021-12-22 13:44:45,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1363 transitions, 22233 flow [2021-12-22 13:44:47,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 1363 transitions, 21310 flow, removed 385 selfloop flow, removed 16 redundant places. [2021-12-22 13:44:47,371 INFO L242 Difference]: Finished difference. Result has 245 places, 871 transitions, 14527 flow [2021-12-22 13:44:47,372 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14527, PETRI_PLACES=245, PETRI_TRANSITIONS=871} [2021-12-22 13:44:47,372 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 147 predicate places. [2021-12-22 13:44:47,372 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 871 transitions, 14527 flow [2021-12-22 13:44:47,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.93333333333334) internal successors, (1229), 15 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:47,373 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:44:47,373 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] [2021-12-22 13:44:47,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:44:47,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:44:47,593 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:44:47,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:44:47,594 INFO L85 PathProgramCache]: Analyzing trace with hash 809566608, now seen corresponding path program 4 times [2021-12-22 13:44:47,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:44:47,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897460251] [2021-12-22 13:44:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:44:47,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:44:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:44:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-22 13:44:47,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:44:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897460251] [2021-12-22 13:44:47,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897460251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:44:47,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:44:47,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:44:47,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738084845] [2021-12-22 13:44:47,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:44:47,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:44:47,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:44:47,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:44:47,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:44:47,654 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 109 [2021-12-22 13:44:47,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 871 transitions, 14527 flow. Second operand has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:47,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:44:47,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 109 [2021-12-22 13:44:47,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:44:55,118 INFO L129 PetriNetUnfolder]: 13343/31723 cut-off events. [2021-12-22 13:44:55,118 INFO L130 PetriNetUnfolder]: For 591077/594041 co-relation queries the response was YES. [2021-12-22 13:44:55,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193876 conditions, 31723 events. 13343/31723 cut-off events. For 591077/594041 co-relation queries the response was YES. Maximal size of possible extension queue 1799. Compared 369559 event pairs, 191 based on Foata normal form. 822/30235 useless extension candidates. Maximal degree in co-relation 193810. Up to 13195 conditions per place. [2021-12-22 13:44:55,761 INFO L132 encePairwiseOnDemand]: 100/109 looper letters, 1044 selfloop transitions, 66 changer transitions 244/1423 dead transitions. [2021-12-22 13:44:55,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 1423 transitions, 26956 flow [2021-12-22 13:44:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:44:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-22 13:44:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 480 transitions. [2021-12-22 13:44:55,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8807339449541285 [2021-12-22 13:44:55,779 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 480 transitions. [2021-12-22 13:44:55,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 480 transitions. [2021-12-22 13:44:55,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:44:55,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 480 transitions. [2021-12-22 13:44:55,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:44:55,781 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) [2021-12-22 13:44:55,781 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) [2021-12-22 13:44:55,781 INFO L186 Difference]: Start difference. First operand has 245 places, 871 transitions, 14527 flow. Second operand 5 states and 480 transitions. [2021-12-22 13:44:55,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 1423 transitions, 26956 flow [2021-12-22 13:45:01,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 1423 transitions, 25066 flow, removed 942 selfloop flow, removed 4 redundant places. [2021-12-22 13:45:01,239 INFO L242 Difference]: Finished difference. Result has 245 places, 765 transitions, 11276 flow [2021-12-22 13:45:01,240 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=13357, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=810, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11276, PETRI_PLACES=245, PETRI_TRANSITIONS=765} [2021-12-22 13:45:01,240 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 147 predicate places. [2021-12-22 13:45:01,240 INFO L470 AbstractCegarLoop]: Abstraction has has 245 places, 765 transitions, 11276 flow [2021-12-22 13:45:01,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:45:01,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:01,241 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] [2021-12-22 13:45:01,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:45:01,241 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:45:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2129325404, now seen corresponding path program 5 times [2021-12-22 13:45:01,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:01,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507159107] [2021-12-22 13:45:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:01,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:45:01,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:01,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507159107] [2021-12-22 13:45:01,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507159107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:45:01,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941091473] [2021-12-22 13:45:01,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 13:45:01,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:45:01,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:45:01,312 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) [2021-12-22 13:45:01,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:45:01,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-22 13:45:01,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:45:01,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 13:45:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:45:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:45:01,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:45:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:45:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941091473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:45:01,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:45:01,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 10 [2021-12-22 13:45:01,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293180764] [2021-12-22 13:45:01,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:45:01,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:45:01,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:45:01,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:45:01,655 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 109 [2021-12-22 13:45:01,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 765 transitions, 11276 flow. Second operand has 10 states, 10 states have (on average 90.5) internal successors, (905), 10 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:45:01,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:01,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 109 [2021-12-22 13:45:01,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:45:09,383 INFO L129 PetriNetUnfolder]: 14535/41385 cut-off events. [2021-12-22 13:45:09,383 INFO L130 PetriNetUnfolder]: For 543274/544938 co-relation queries the response was YES. [2021-12-22 13:45:10,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 224887 conditions, 41385 events. 14535/41385 cut-off events. For 543274/544938 co-relation queries the response was YES. Maximal size of possible extension queue 1919. Compared 527939 event pairs, 546 based on Foata normal form. 1101/38592 useless extension candidates. Maximal degree in co-relation 224818. Up to 8598 conditions per place. [2021-12-22 13:45:10,675 INFO L132 encePairwiseOnDemand]: 102/109 looper letters, 539 selfloop transitions, 217 changer transitions 0/1091 dead transitions. [2021-12-22 13:45:10,676 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1091 transitions, 18334 flow [2021-12-22 13:45:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 13:45:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-22 13:45:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 752 transitions. [2021-12-22 13:45:10,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8623853211009175 [2021-12-22 13:45:10,677 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 752 transitions. [2021-12-22 13:45:10,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 752 transitions. [2021-12-22 13:45:10,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:45:10,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 752 transitions. [2021-12-22 13:45:10,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.0) internal successors, (752), 8 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:45:10,680 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) [2021-12-22 13:45:10,680 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) [2021-12-22 13:45:10,680 INFO L186 Difference]: Start difference. First operand has 245 places, 765 transitions, 11276 flow. Second operand 8 states and 752 transitions. [2021-12-22 13:45:10,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1091 transitions, 18334 flow [2021-12-22 13:45:17,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1091 transitions, 17793 flow, removed 234 selfloop flow, removed 9 redundant places. [2021-12-22 13:45:17,190 INFO L242 Difference]: Finished difference. Result has 235 places, 831 transitions, 13009 flow [2021-12-22 13:45:17,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=10098, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13009, PETRI_PLACES=235, PETRI_TRANSITIONS=831} [2021-12-22 13:45:17,191 INFO L334 CegarLoopForPetriNet]: 98 programPoint places, 137 predicate places. [2021-12-22 13:45:17,191 INFO L470 AbstractCegarLoop]: Abstraction has has 235 places, 831 transitions, 13009 flow [2021-12-22 13:45:17,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.5) internal successors, (905), 10 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:45:17,192 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:45:17,192 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] [2021-12-22 13:45:17,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-22 13:45:17,408 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,SelfDestructingSolverStorable14 [2021-12-22 13:45:17,408 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-22 13:45:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:45:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1286772282, now seen corresponding path program 6 times [2021-12-22 13:45:17,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:45:17,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624855473] [2021-12-22 13:45:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:45:17,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:45:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:45:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 13:45:17,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:45:17,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624855473] [2021-12-22 13:45:17,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624855473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:45:17,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030758141] [2021-12-22 13:45:17,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 13:45:17,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:45:17,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:45:17,512 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) [2021-12-22 13:45:17,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:45:17,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-22 13:45:17,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 13:45:17,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 13:45:17,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:45:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 13:45:17,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:45:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 13:45:18,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030758141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:45:18,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:45:18,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2021-12-22 13:45:18,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493559031] [2021-12-22 13:45:18,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:45:18,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 13:45:18,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:45:18,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 13:45:18,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:45:18,016 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 109 [2021-12-22 13:45:18,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 831 transitions, 13009 flow. Second operand has 16 states, 16 states have (on average 80.25) internal successors, (1284), 16 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:45:18,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:45:18,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 109 [2021-12-22 13:45:18,017 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand