./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:53:11,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:53:11,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:53:12,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:53:12,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:53:12,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:53:12,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:53:12,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:53:12,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:53:12,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:53:12,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:53:12,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:53:12,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:53:12,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:53:12,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:53:12,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:53:12,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:53:12,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:53:12,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:53:12,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:53:12,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:53:12,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:53:12,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:53:12,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:53:12,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:53:12,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:53:12,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:53:12,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:53:12,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:53:12,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:53:12,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:53:12,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:53:12,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:53:12,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:53:12,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:53:12,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:53:12,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:53:12,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:53:12,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:53:12,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:53:12,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:53:12,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:53:12,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:53:12,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:53:12,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:53:12,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:53:12,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:53:12,103 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:53:12,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:53:12,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:53:12,104 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:53:12,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:53:12,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:53:12,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:53:12,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:53:12,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:53:12,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:53:12,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:53:12,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:53:12,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:53:12,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:53:12,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:53:12,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:53:12,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:53:12,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:53:12,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:53:12,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:53:12,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:53:12,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:53:12,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:53:12,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:53:12,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:53:12,108 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:53:12,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:53:12,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:53:12,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:53:12,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2021-12-14 16:53:12,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:53:12,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:53:12,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:53:12,357 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:53:12,358 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:53:12,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2021-12-14 16:53:12,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f5d0b9ab/45f38a50e2e64eae9f769cb0c064827a/FLAGe5a89792b [2021-12-14 16:53:12,850 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:53:12,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2021-12-14 16:53:12,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f5d0b9ab/45f38a50e2e64eae9f769cb0c064827a/FLAGe5a89792b [2021-12-14 16:53:13,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f5d0b9ab/45f38a50e2e64eae9f769cb0c064827a [2021-12-14 16:53:13,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:53:13,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:53:13,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:53:13,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:53:13,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:53:13,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41fe6385 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13, skipping insertion in model container [2021-12-14 16:53:13,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:53:13,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:53:13,490 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2021-12-14 16:53:13,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:53:13,502 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:53:13,521 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2021-12-14 16:53:13,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:53:13,535 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:53:13,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13 WrapperNode [2021-12-14 16:53:13,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:53:13,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:53:13,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:53:13,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:53:13,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,596 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2021-12-14 16:53:13,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:53:13,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:53:13,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:53:13,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:53:13,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,628 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:53:13,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:53:13,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:53:13,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:53:13,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (1/1) ... [2021-12-14 16:53:13,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:53:13,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:53:13,687 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) [2021-12-14 16:53:13,688 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 [2021-12-14 16:53:13,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:53:13,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-14 16:53:13,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-14 16:53:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-14 16:53:13,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-14 16:53:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:53:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 16:53:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 16:53:13,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-14 16:53:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-14 16:53:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 16:53:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:53:13,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:53:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 16:53:13,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 16:53:13,728 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-14 16:53:13,828 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:53:13,829 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:53:14,176 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:53:14,252 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:53:14,253 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 16:53:14,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:53:14 BoogieIcfgContainer [2021-12-14 16:53:14,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:53:14,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:53:14,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:53:14,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:53:14,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:53:13" (1/3) ... [2021-12-14 16:53:14,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d02b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:53:14, skipping insertion in model container [2021-12-14 16:53:14,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:53:13" (2/3) ... [2021-12-14 16:53:14,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d02b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:53:14, skipping insertion in model container [2021-12-14 16:53:14,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:53:14" (3/3) ... [2021-12-14 16:53:14,266 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2021-12-14 16:53:14,271 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-14 16:53:14,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:53:14,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 16:53:14,271 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-14 16:53:14,314 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,315 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,315 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,315 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,315 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,316 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,316 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,316 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,316 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,317 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,317 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,317 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,317 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,317 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,318 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,318 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,318 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,318 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,319 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,320 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,320 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,320 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,321 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,322 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,323 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,323 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,323 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,324 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,325 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,326 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,326 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,326 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,326 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,326 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,327 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,327 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,327 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,331 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,332 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,332 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,332 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,332 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,333 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,334 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,334 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,335 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,335 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,335 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,336 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-14 16:53:14,341 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-14 16:53:14,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:53:14,396 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 [2021-12-14 16:53:14,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-14 16:53:14,415 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 181 places, 189 transitions, 394 flow [2021-12-14 16:53:14,524 INFO L129 PetriNetUnfolder]: 15/187 cut-off events. [2021-12-14 16:53:14,525 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:53:14,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 102 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2021-12-14 16:53:14,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 189 transitions, 394 flow [2021-12-14 16:53:14,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 178 transitions, 368 flow [2021-12-14 16:53:14,570 INFO L129 PetriNetUnfolder]: 15/177 cut-off events. [2021-12-14 16:53:14,570 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-14 16:53:14,571 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:53:14,571 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:53:14,572 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:53:14,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:53:14,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1982625687, now seen corresponding path program 1 times [2021-12-14 16:53:14,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:53:14,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314998774] [2021-12-14 16:53:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:14,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:53:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:53:14,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:53:14,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314998774] [2021-12-14 16:53:14,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314998774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:53:14,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:53:14,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:53:14,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895605903] [2021-12-14 16:53:14,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:53:14,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:53:14,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:53:14,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:53:14,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:53:14,852 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 189 [2021-12-14 16:53:14,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 178 transitions, 368 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:14,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:53:14,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 189 [2021-12-14 16:53:14,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:53:14,950 INFO L129 PetriNetUnfolder]: 14/193 cut-off events. [2021-12-14 16:53:14,951 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-14 16:53:14,953 INFO L84 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 193 events. 14/193 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 168 event pairs, 3 based on Foata normal form. 15/195 useless extension candidates. Maximal degree in co-relation 147. Up to 20 conditions per place. [2021-12-14 16:53:14,955 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 7 selfloop transitions, 0 changer transitions 6/168 dead transitions. [2021-12-14 16:53:14,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 168 transitions, 362 flow [2021-12-14 16:53:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:53:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-14 16:53:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 359 transitions. [2021-12-14 16:53:14,975 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9497354497354498 [2021-12-14 16:53:14,976 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 359 transitions. [2021-12-14 16:53:14,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 359 transitions. [2021-12-14 16:53:14,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:53:14,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 359 transitions. [2021-12-14 16:53:14,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.5) internal successors, (359), 2 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:14,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:14,996 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:14,998 INFO L186 Difference]: Start difference. First operand has 170 places, 178 transitions, 368 flow. Second operand 2 states and 359 transitions. [2021-12-14 16:53:14,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 168 transitions, 362 flow [2021-12-14 16:53:15,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 168 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:53:15,009 INFO L242 Difference]: Finished difference. Result has 167 places, 162 transitions, 328 flow [2021-12-14 16:53:15,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=328, PETRI_PLACES=167, PETRI_TRANSITIONS=162} [2021-12-14 16:53:15,017 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, -3 predicate places. [2021-12-14 16:53:15,017 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 162 transitions, 328 flow [2021-12-14 16:53:15,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,018 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:53:15,018 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:53:15,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:53:15,019 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:53:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:53:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash -955987473, now seen corresponding path program 1 times [2021-12-14 16:53:15,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:53:15,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315710671] [2021-12-14 16:53:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:15,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:53:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:53:15,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:53:15,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315710671] [2021-12-14 16:53:15,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315710671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:53:15,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:53:15,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:53:15,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745964587] [2021-12-14 16:53:15,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:53:15,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:53:15,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:53:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:53:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:53:15,285 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 189 [2021-12-14 16:53:15,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 162 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:53:15,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 189 [2021-12-14 16:53:15,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:53:15,500 INFO L129 PetriNetUnfolder]: 56/309 cut-off events. [2021-12-14 16:53:15,501 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-14 16:53:15,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 309 events. 56/309 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 860 event pairs, 12 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 445. Up to 64 conditions per place. [2021-12-14 16:53:15,504 INFO L132 encePairwiseOnDemand]: 183/189 looper letters, 45 selfloop transitions, 5 changer transitions 0/171 dead transitions. [2021-12-14 16:53:15,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 171 transitions, 447 flow [2021-12-14 16:53:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:53:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-14 16:53:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 837 transitions. [2021-12-14 16:53:15,507 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2021-12-14 16:53:15,508 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 837 transitions. [2021-12-14 16:53:15,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 837 transitions. [2021-12-14 16:53:15,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:53:15,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 837 transitions. [2021-12-14 16:53:15,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 139.5) internal successors, (837), 6 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,515 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 189.0) internal successors, (1323), 7 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,515 INFO L186 Difference]: Start difference. First operand has 167 places, 162 transitions, 328 flow. Second operand 6 states and 837 transitions. [2021-12-14 16:53:15,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 171 transitions, 447 flow [2021-12-14 16:53:15,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 171 transitions, 447 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:53:15,520 INFO L242 Difference]: Finished difference. Result has 167 places, 163 transitions, 346 flow [2021-12-14 16:53:15,521 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=167, PETRI_TRANSITIONS=163} [2021-12-14 16:53:15,522 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, -3 predicate places. [2021-12-14 16:53:15,522 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 163 transitions, 346 flow [2021-12-14 16:53:15,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.66666666666666) internal successors, (820), 6 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,523 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:53:15,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:53:15,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:53:15,524 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:53:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:53:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1324649205, now seen corresponding path program 1 times [2021-12-14 16:53:15,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:53:15,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974379370] [2021-12-14 16:53:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:15,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:53:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:53:15,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:53:15,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974379370] [2021-12-14 16:53:15,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974379370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:53:15,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:53:15,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:53:15,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593293092] [2021-12-14 16:53:15,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:53:15,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:53:15,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:53:15,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:53:15,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:53:15,708 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 189 [2021-12-14 16:53:15,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 163 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:53:15,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 189 [2021-12-14 16:53:15,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:53:15,902 INFO L129 PetriNetUnfolder]: 57/353 cut-off events. [2021-12-14 16:53:15,903 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2021-12-14 16:53:15,904 INFO L84 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 353 events. 57/353 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 963 event pairs, 12 based on Foata normal form. 4/338 useless extension candidates. Maximal degree in co-relation 525. Up to 60 conditions per place. [2021-12-14 16:53:15,905 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 46 selfloop transitions, 8 changer transitions 7/182 dead transitions. [2021-12-14 16:53:15,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 182 transitions, 511 flow [2021-12-14 16:53:15,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:53:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-14 16:53:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1158 transitions. [2021-12-14 16:53:15,911 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7658730158730159 [2021-12-14 16:53:15,911 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1158 transitions. [2021-12-14 16:53:15,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1158 transitions. [2021-12-14 16:53:15,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:53:15,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1158 transitions. [2021-12-14 16:53:15,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.75) internal successors, (1158), 8 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 189.0) internal successors, (1701), 9 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,918 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 189.0) internal successors, (1701), 9 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,919 INFO L186 Difference]: Start difference. First operand has 167 places, 163 transitions, 346 flow. Second operand 8 states and 1158 transitions. [2021-12-14 16:53:15,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 182 transitions, 511 flow [2021-12-14 16:53:15,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 182 transitions, 501 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-14 16:53:15,924 INFO L242 Difference]: Finished difference. Result has 172 places, 164 transitions, 364 flow [2021-12-14 16:53:15,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=364, PETRI_PLACES=172, PETRI_TRANSITIONS=164} [2021-12-14 16:53:15,926 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2021-12-14 16:53:15,927 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 164 transitions, 364 flow [2021-12-14 16:53:15,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.14285714285714) internal successors, (988), 7 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:15,928 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:53:15,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:53:15,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:53:15,928 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:53:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:53:15,929 INFO L85 PathProgramCache]: Analyzing trace with hash 195954356, now seen corresponding path program 1 times [2021-12-14 16:53:15,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:53:15,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914969648] [2021-12-14 16:53:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:15,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:53:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:53:16,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:53:16,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914969648] [2021-12-14 16:53:16,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914969648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:53:16,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:53:16,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 16:53:16,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588805133] [2021-12-14 16:53:16,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:53:16,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:53:16,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:53:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:53:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:53:16,101 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 189 [2021-12-14 16:53:16,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 164 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:53:16,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 189 [2021-12-14 16:53:16,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:53:16,249 INFO L129 PetriNetUnfolder]: 156/581 cut-off events. [2021-12-14 16:53:16,250 INFO L130 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2021-12-14 16:53:16,251 INFO L84 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 581 events. 156/581 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2614 event pairs, 14 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 959. Up to 141 conditions per place. [2021-12-14 16:53:16,255 INFO L132 encePairwiseOnDemand]: 183/189 looper letters, 44 selfloop transitions, 11 changer transitions 0/194 dead transitions. [2021-12-14 16:53:16,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 194 transitions, 558 flow [2021-12-14 16:53:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:53:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-14 16:53:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 823 transitions. [2021-12-14 16:53:16,258 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.870899470899471 [2021-12-14 16:53:16,258 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 823 transitions. [2021-12-14 16:53:16,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 823 transitions. [2021-12-14 16:53:16,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:53:16,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 823 transitions. [2021-12-14 16:53:16,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,264 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,264 INFO L186 Difference]: Start difference. First operand has 172 places, 164 transitions, 364 flow. Second operand 5 states and 823 transitions. [2021-12-14 16:53:16,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 194 transitions, 558 flow [2021-12-14 16:53:16,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 194 transitions, 534 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-12-14 16:53:16,270 INFO L242 Difference]: Finished difference. Result has 172 places, 174 transitions, 437 flow [2021-12-14 16:53:16,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=437, PETRI_PLACES=172, PETRI_TRANSITIONS=174} [2021-12-14 16:53:16,272 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2021-12-14 16:53:16,272 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 174 transitions, 437 flow [2021-12-14 16:53:16,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,273 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:53:16,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:53:16,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:53:16,273 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:53:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:53:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash -118877064, now seen corresponding path program 2 times [2021-12-14 16:53:16,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:53:16,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863850591] [2021-12-14 16:53:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:16,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:53:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:53:16,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:53:16,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863850591] [2021-12-14 16:53:16,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863850591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:53:16,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:53:16,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:53:16,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437578178] [2021-12-14 16:53:16,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:53:16,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:53:16,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:53:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:53:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:53:16,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 189 [2021-12-14 16:53:16,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 174 transitions, 437 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:53:16,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 189 [2021-12-14 16:53:16,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:53:16,516 INFO L129 PetriNetUnfolder]: 106/528 cut-off events. [2021-12-14 16:53:16,516 INFO L130 PetriNetUnfolder]: For 329/354 co-relation queries the response was YES. [2021-12-14 16:53:16,519 INFO L84 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 528 events. 106/528 cut-off events. For 329/354 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2386 event pairs, 13 based on Foata normal form. 8/517 useless extension candidates. Maximal degree in co-relation 985. Up to 100 conditions per place. [2021-12-14 16:53:16,521 INFO L132 encePairwiseOnDemand]: 184/189 looper letters, 51 selfloop transitions, 2 changer transitions 4/190 dead transitions. [2021-12-14 16:53:16,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 190 transitions, 630 flow [2021-12-14 16:53:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:53:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-14 16:53:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 734 transitions. [2021-12-14 16:53:16,524 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7767195767195767 [2021-12-14 16:53:16,524 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 734 transitions. [2021-12-14 16:53:16,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 734 transitions. [2021-12-14 16:53:16,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:53:16,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 734 transitions. [2021-12-14 16:53:16,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,528 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,529 INFO L186 Difference]: Start difference. First operand has 172 places, 174 transitions, 437 flow. Second operand 5 states and 734 transitions. [2021-12-14 16:53:16,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 190 transitions, 630 flow [2021-12-14 16:53:16,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 190 transitions, 630 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-14 16:53:16,539 INFO L242 Difference]: Finished difference. Result has 179 places, 175 transitions, 453 flow [2021-12-14 16:53:16,539 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=179, PETRI_TRANSITIONS=175} [2021-12-14 16:53:16,541 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 9 predicate places. [2021-12-14 16:53:16,542 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 175 transitions, 453 flow [2021-12-14 16:53:16,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,542 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:53:16,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:53:16,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:53:16,543 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:53:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:53:16,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1098415054, now seen corresponding path program 1 times [2021-12-14 16:53:16,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:53:16,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397208205] [2021-12-14 16:53:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:16,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:53:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:53:16,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:53:16,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397208205] [2021-12-14 16:53:16,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397208205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:53:16,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:53:16,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:53:16,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161413615] [2021-12-14 16:53:16,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:53:16,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:53:16,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:53:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:53:16,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:53:16,657 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 189 [2021-12-14 16:53:16,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 175 transitions, 453 flow. Second operand has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:53:16,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 189 [2021-12-14 16:53:16,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:53:16,737 INFO L129 PetriNetUnfolder]: 78/488 cut-off events. [2021-12-14 16:53:16,738 INFO L130 PetriNetUnfolder]: For 285/307 co-relation queries the response was YES. [2021-12-14 16:53:16,740 INFO L84 FinitePrefix]: Finished finitePrefix Result has 893 conditions, 488 events. 78/488 cut-off events. For 285/307 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1978 event pairs, 9 based on Foata normal form. 11/481 useless extension candidates. Maximal degree in co-relation 880. Up to 106 conditions per place. [2021-12-14 16:53:16,741 INFO L132 encePairwiseOnDemand]: 186/189 looper letters, 29 selfloop transitions, 2 changer transitions 2/185 dead transitions. [2021-12-14 16:53:16,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 185 transitions, 570 flow [2021-12-14 16:53:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:53:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-14 16:53:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2021-12-14 16:53:16,744 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.908289241622575 [2021-12-14 16:53:16,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2021-12-14 16:53:16,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2021-12-14 16:53:16,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:53:16,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2021-12-14 16:53:16,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,747 INFO L186 Difference]: Start difference. First operand has 179 places, 175 transitions, 453 flow. Second operand 3 states and 515 transitions. [2021-12-14 16:53:16,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 185 transitions, 570 flow [2021-12-14 16:53:16,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 185 transitions, 564 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-14 16:53:16,755 INFO L242 Difference]: Finished difference. Result has 177 places, 176 transitions, 463 flow [2021-12-14 16:53:16,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=463, PETRI_PLACES=177, PETRI_TRANSITIONS=176} [2021-12-14 16:53:16,758 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 7 predicate places. [2021-12-14 16:53:16,758 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 176 transitions, 463 flow [2021-12-14 16:53:16,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,759 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:53:16,759 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:53:16,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:53:16,760 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:53:16,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:53:16,761 INFO L85 PathProgramCache]: Analyzing trace with hash 872199849, now seen corresponding path program 1 times [2021-12-14 16:53:16,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:53:16,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910683619] [2021-12-14 16:53:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:16,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:53:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:53:16,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:53:16,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910683619] [2021-12-14 16:53:16,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910683619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:53:16,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:53:16,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:53:16,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622282290] [2021-12-14 16:53:16,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:53:16,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:53:16,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:53:16,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:53:16,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:53:16,849 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 189 [2021-12-14 16:53:16,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 176 transitions, 463 flow. Second operand has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:16,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:53:16,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 189 [2021-12-14 16:53:16,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:53:17,027 INFO L129 PetriNetUnfolder]: 77/620 cut-off events. [2021-12-14 16:53:17,027 INFO L130 PetriNetUnfolder]: For 368/401 co-relation queries the response was YES. [2021-12-14 16:53:17,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 620 events. 77/620 cut-off events. For 368/401 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2571 event pairs, 16 based on Foata normal form. 14/610 useless extension candidates. Maximal degree in co-relation 1125. Up to 110 conditions per place. [2021-12-14 16:53:17,032 INFO L132 encePairwiseOnDemand]: 179/189 looper letters, 38 selfloop transitions, 8 changer transitions 22/202 dead transitions. [2021-12-14 16:53:17,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 202 transitions, 685 flow [2021-12-14 16:53:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:53:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-14 16:53:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1361 transitions. [2021-12-14 16:53:17,036 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8001175778953556 [2021-12-14 16:53:17,036 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1361 transitions. [2021-12-14 16:53:17,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1361 transitions. [2021-12-14 16:53:17,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:53:17,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1361 transitions. [2021-12-14 16:53:17,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.22222222222223) internal successors, (1361), 9 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:17,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:17,044 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:17,044 INFO L186 Difference]: Start difference. First operand has 177 places, 176 transitions, 463 flow. Second operand 9 states and 1361 transitions. [2021-12-14 16:53:17,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 202 transitions, 685 flow [2021-12-14 16:53:17,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 202 transitions, 683 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-14 16:53:17,050 INFO L242 Difference]: Finished difference. Result has 186 places, 177 transitions, 489 flow [2021-12-14 16:53:17,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=489, PETRI_PLACES=186, PETRI_TRANSITIONS=177} [2021-12-14 16:53:17,051 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 16 predicate places. [2021-12-14 16:53:17,052 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 177 transitions, 489 flow [2021-12-14 16:53:17,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:17,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:53:17,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:53:17,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:53:17,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:53:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:53:17,054 INFO L85 PathProgramCache]: Analyzing trace with hash -751624308, now seen corresponding path program 1 times [2021-12-14 16:53:17,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:53:17,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464397104] [2021-12-14 16:53:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:17,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:53:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:53:17,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:53:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464397104] [2021-12-14 16:53:17,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464397104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:53:17,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825809614] [2021-12-14 16:53:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:17,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:53:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:53:17,931 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) [2021-12-14 16:53:17,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:53:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:18,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-14 16:53:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:53:18,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:53:18,733 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-14 16:53:18,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-14 16:53:18,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 16:53:19,749 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-14 16:53:19,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-12-14 16:53:19,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:53:20,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:53:20,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:53:21,168 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-12-14 16:53:21,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 10 [2021-12-14 16:53:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:53:21,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:53:28,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:28,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 95 [2021-12-14 16:53:28,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:28,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 13300 treesize of output 12330 [2021-12-14 16:53:28,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:28,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 12276 treesize of output 11556 [2021-12-14 16:53:28,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:28,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 11508 treesize of output 8484 [2021-12-14 16:53:28,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:28,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 8436 treesize of output 6948 [2021-12-14 16:53:28,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-14 16:53:28,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 16:53:28,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-14 16:53:28,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127080306] [2021-12-14 16:53:28,822 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 16:53:28,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 16:53:28,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:53:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 16:53:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=4043, Unknown=63, NotChecked=0, Total=4830 [2021-12-14 16:53:28,826 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 189 [2021-12-14 16:53:28,828 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 177 transitions, 489 flow. Second operand has 23 states, 23 states have (on average 73.3913043478261) internal successors, (1688), 23 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:28,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:53:28,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 189 [2021-12-14 16:53:28,829 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-14 16:53:31,049 INFO L129 PetriNetUnfolder]: 2018/4224 cut-off events. [2021-12-14 16:53:31,049 INFO L130 PetriNetUnfolder]: For 2923/2931 co-relation queries the response was YES. [2021-12-14 16:53:31,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10791 conditions, 4224 events. 2018/4224 cut-off events. For 2923/2931 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31380 event pairs, 301 based on Foata normal form. 1/4040 useless extension candidates. Maximal degree in co-relation 10777. Up to 1096 conditions per place. [2021-12-14 16:53:31,082 INFO L132 encePairwiseOnDemand]: 158/189 looper letters, 247 selfloop transitions, 42 changer transitions 14/362 dead transitions. [2021-12-14 16:53:31,083 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 362 transitions, 1769 flow [2021-12-14 16:53:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 16:53:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-12-14 16:53:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2329 transitions. [2021-12-14 16:53:31,090 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4107583774250441 [2021-12-14 16:53:31,090 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2329 transitions. [2021-12-14 16:53:31,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2329 transitions. [2021-12-14 16:53:31,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-14 16:53:31,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2329 transitions. [2021-12-14 16:53:31,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 77.63333333333334) internal successors, (2329), 30 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:31,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 189.0) internal successors, (5859), 31 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:31,107 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 189.0) internal successors, (5859), 31 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:31,107 INFO L186 Difference]: Start difference. First operand has 186 places, 177 transitions, 489 flow. Second operand 30 states and 2329 transitions. [2021-12-14 16:53:31,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 362 transitions, 1769 flow [2021-12-14 16:53:31,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 362 transitions, 1743 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-12-14 16:53:31,119 INFO L242 Difference]: Finished difference. Result has 224 places, 209 transitions, 775 flow [2021-12-14 16:53:31,120 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=775, PETRI_PLACES=224, PETRI_TRANSITIONS=209} [2021-12-14 16:53:31,120 INFO L334 CegarLoopForPetriNet]: 170 programPoint places, 54 predicate places. [2021-12-14 16:53:31,121 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 209 transitions, 775 flow [2021-12-14 16:53:31,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 73.3913043478261) internal successors, (1688), 23 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:53:31,122 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-14 16:53:31,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:53:31,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:53:31,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:53:31,332 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-14 16:53:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:53:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1443546736, now seen corresponding path program 2 times [2021-12-14 16:53:31,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:53:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757964554] [2021-12-14 16:53:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:53:31,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:53:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:53:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:53:32,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:53:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757964554] [2021-12-14 16:53:32,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757964554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:53:32,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685445635] [2021-12-14 16:53:32,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 16:53:32,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:53:32,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:53:32,812 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) [2021-12-14 16:53:32,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:53:32,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 16:53:32,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 16:53:32,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-14 16:53:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:53:33,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:53:33,055 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-14 16:53:33,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-14 16:53:33,843 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-12-14 16:53:33,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-12-14 16:53:34,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 16:53:35,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 16:53:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 16:53:35,461 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-12-14 16:53:35,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 17 [2021-12-14 16:53:35,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-14 16:53:36,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 16:53:36,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 16:53:36,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 16:53:36,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-14 16:53:37,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:37,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2021-12-14 16:53:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 16:53:38,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:53:44,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:44,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 80 [2021-12-14 16:53:44,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:44,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1838 treesize of output 1782 [2021-12-14 16:53:44,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:44,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1766 treesize of output 1406 [2021-12-14 16:53:44,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:44,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1358 treesize of output 1202 [2021-12-14 16:53:44,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 16:53:44,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1154 treesize of output 1072 [2021-12-14 16:54:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:54:00,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685445635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:54:00,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:54:00,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 37, 38] total 96 [2021-12-14 16:54:00,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254671065] [2021-12-14 16:54:00,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:54:00,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-14 16:54:00,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:54:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-14 16:54:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=926, Invalid=8105, Unknown=89, NotChecked=0, Total=9120 [2021-12-14 16:54:00,925 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 189 [2021-12-14 16:54:00,930 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 209 transitions, 775 flow. Second operand has 96 states, 96 states have (on average 56.197916666666664) internal successors, (5395), 96 states have internal predecessors, (5395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:54:00,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-14 16:54:00,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 189 [2021-12-14 16:54:00,930 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand