./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-mult-equiv.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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 23:07:51,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 23:07:51,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 23:07:51,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 23:07:51,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 23:07:51,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 23:07:51,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 23:07:51,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 23:07:51,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 23:07:51,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 23:07:51,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 23:07:51,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 23:07:51,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 23:07:51,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 23:07:51,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 23:07:51,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 23:07:51,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 23:07:51,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 23:07:51,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 23:07:51,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 23:07:51,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 23:07:51,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 23:07:51,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 23:07:51,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 23:07:51,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 23:07:51,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 23:07:51,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 23:07:51,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 23:07:51,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 23:07:51,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 23:07:51,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 23:07:51,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 23:07:51,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 23:07:51,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 23:07:51,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 23:07:51,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 23:07:51,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 23:07:51,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 23:07:51,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 23:07:51,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 23:07:51,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 23:07:51,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 23:07:51,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 23:07:51,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 23:07:51,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 23:07:51,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 23:07:51,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 23:07:51,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 23:07:51,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 23:07:51,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 23:07:51,455 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 23:07:51,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 23:07:51,456 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 23:07:51,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 23:07:51,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 23:07:51,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 23:07:51,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 23:07:51,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 23:07:51,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 23:07:51,457 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 23:07:51,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 23:07:51,457 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 23:07:51,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 23:07:51,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 23:07:51,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 23:07:51,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 23:07:51,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:07:51,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 23:07:51,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 23:07:51,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 23:07:51,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 23:07:51,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 23:07:51,459 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 23:07:51,459 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 23:07:51,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 23:07:51,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 23:07:51,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2021-12-17 23:07:51,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 23:07:51,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 23:07:51,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 23:07:51,679 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 23:07:51,680 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 23:07:51,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-12-17 23:07:51,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0189362c4/e741c73ade4845d6b8ffec586ec58b5e/FLAG57344e636 [2021-12-17 23:07:52,077 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 23:07:52,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2021-12-17 23:07:52,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0189362c4/e741c73ade4845d6b8ffec586ec58b5e/FLAG57344e636 [2021-12-17 23:07:52,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0189362c4/e741c73ade4845d6b8ffec586ec58b5e [2021-12-17 23:07:52,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 23:07:52,512 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 23:07:52,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 23:07:52,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 23:07:52,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 23:07:52,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf5c74f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52, skipping insertion in model container [2021-12-17 23:07:52,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 23:07:52,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 23:07:52,713 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-mult-equiv.wvr.c[2591,2604] [2021-12-17 23:07:52,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:07:52,728 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 23:07:52,745 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-mult-equiv.wvr.c[2591,2604] [2021-12-17 23:07:52,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 23:07:52,754 INFO L208 MainTranslator]: Completed translation [2021-12-17 23:07:52,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52 WrapperNode [2021-12-17 23:07:52,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 23:07:52,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 23:07:52,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 23:07:52,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 23:07:52,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,776 INFO L137 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-12-17 23:07:52,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 23:07:52,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 23:07:52,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 23:07:52,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 23:07:52,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 23:07:52,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 23:07:52,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 23:07:52,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 23:07:52,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (1/1) ... [2021-12-17 23:07:52,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 23:07:52,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:07:52,823 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) [2021-12-17 23:07:52,827 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 [2021-12-17 23:07:52,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 23:07:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 23:07:52,853 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 23:07:52,853 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 23:07:52,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 23:07:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-17 23:07:52,854 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-17 23:07:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 23:07:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 23:07:52,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 23:07:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 23:07:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 23:07:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 23:07:52,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 23:07:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 23:07:52,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 23:07:52,856 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 23:07:52,938 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 23:07:52,939 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 23:07:53,093 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 23:07:53,118 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 23:07:53,118 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 23:07:53,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:07:53 BoogieIcfgContainer [2021-12-17 23:07:53,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 23:07:53,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 23:07:53,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 23:07:53,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 23:07:53,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:07:52" (1/3) ... [2021-12-17 23:07:53,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1021dc98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:07:53, skipping insertion in model container [2021-12-17 23:07:53,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:07:52" (2/3) ... [2021-12-17 23:07:53,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1021dc98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:07:53, skipping insertion in model container [2021-12-17 23:07:53,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:07:53" (3/3) ... [2021-12-17 23:07:53,126 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2021-12-17 23:07:53,129 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 23:07:53,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 23:07:53,130 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 23:07:53,130 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 23:07:53,155 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,155 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,156 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,156 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,156 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,156 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,156 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,157 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,158 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,158 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,158 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,158 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,159 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,159 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,159 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,159 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,159 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,160 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,160 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,161 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,161 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,161 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,161 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,161 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,162 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,162 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,164 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,165 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,165 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,166 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,166 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,166 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 23:07:53,168 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-17 23:07:53,198 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 23:07:53,205 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 [2021-12-17 23:07:53,206 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-17 23:07:53,219 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2021-12-17 23:07:53,260 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-12-17 23:07:53,260 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:07:53,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2021-12-17 23:07:53,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2021-12-17 23:07:53,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2021-12-17 23:07:53,285 INFO L129 PetriNetUnfolder]: 7/82 cut-off events. [2021-12-17 23:07:53,285 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-17 23:07:53,285 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:53,286 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] [2021-12-17 23:07:53,286 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2021-12-17 23:07:53,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:53,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66374149] [2021-12-17 23:07:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:53,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:53,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:53,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66374149] [2021-12-17 23:07:53,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66374149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:53,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:53,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 23:07:53,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002642551] [2021-12-17 23:07:53,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:53,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 23:07:53,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 23:07:53,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 23:07:53,483 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2021-12-17 23:07:53,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:53,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2021-12-17 23:07:53,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:53,518 INFO L129 PetriNetUnfolder]: 26/138 cut-off events. [2021-12-17 23:07:53,519 INFO L130 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2021-12-17 23:07:53,520 INFO L84 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 246 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2021-12-17 23:07:53,521 INFO L132 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2021-12-17 23:07:53,521 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2021-12-17 23:07:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 23:07:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 23:07:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2021-12-17 23:07:53,530 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2021-12-17 23:07:53,530 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2021-12-17 23:07:53,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2021-12-17 23:07:53,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:53,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2021-12-17 23:07:53,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,537 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,538 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2021-12-17 23:07:53,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2021-12-17 23:07:53,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-17 23:07:53,543 INFO L242 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2021-12-17 23:07:53,544 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2021-12-17 23:07:53,546 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2021-12-17 23:07:53,546 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2021-12-17 23:07:53,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,547 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:53,547 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] [2021-12-17 23:07:53,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 23:07:53,547 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:53,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1292779301, now seen corresponding path program 1 times [2021-12-17 23:07:53,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:53,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815530344] [2021-12-17 23:07:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:53,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:53,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:53,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815530344] [2021-12-17 23:07:53,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815530344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:53,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:53,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:07:53,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149438077] [2021-12-17 23:07:53,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:53,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:07:53,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:53,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:07:53,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:07:53,744 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2021-12-17 23:07:53,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:53,746 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2021-12-17 23:07:53,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:53,865 INFO L129 PetriNetUnfolder]: 34/192 cut-off events. [2021-12-17 23:07:53,868 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2021-12-17 23:07:53,869 INFO L84 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 479 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2021-12-17 23:07:53,870 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2021-12-17 23:07:53,871 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2021-12-17 23:07:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:07:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:07:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2021-12-17 23:07:53,877 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2021-12-17 23:07:53,877 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2021-12-17 23:07:53,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2021-12-17 23:07:53,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:53,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2021-12-17 23:07:53,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,882 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,882 INFO L186 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2021-12-17 23:07:53,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2021-12-17 23:07:53,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 23:07:53,886 INFO L242 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2021-12-17 23:07:53,886 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2021-12-17 23:07:53,887 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2021-12-17 23:07:53,888 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2021-12-17 23:07:53,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:53,888 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:53,888 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] [2021-12-17 23:07:53,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 23:07:53,889 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:53,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:53,889 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2021-12-17 23:07:53,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:53,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878966621] [2021-12-17 23:07:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:53,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:54,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:54,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878966621] [2021-12-17 23:07:54,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878966621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:54,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:54,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:07:54,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645252842] [2021-12-17 23:07:54,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:54,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:07:54,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:54,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:07:54,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:07:54,128 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-17 23:07:54,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:54,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-17 23:07:54,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:54,358 INFO L129 PetriNetUnfolder]: 297/760 cut-off events. [2021-12-17 23:07:54,359 INFO L130 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2021-12-17 23:07:54,362 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4079 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2021-12-17 23:07:54,366 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2021-12-17 23:07:54,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2021-12-17 23:07:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:07:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 23:07:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2021-12-17 23:07:54,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2021-12-17 23:07:54,369 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2021-12-17 23:07:54,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2021-12-17 23:07:54,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:54,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2021-12-17 23:07:54,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,374 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,374 INFO L186 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2021-12-17 23:07:54,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2021-12-17 23:07:54,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-12-17 23:07:54,381 INFO L242 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2021-12-17 23:07:54,383 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2021-12-17 23:07:54,385 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2021-12-17 23:07:54,385 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2021-12-17 23:07:54,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:54,387 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] [2021-12-17 23:07:54,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 23:07:54,387 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:54,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1540254679, now seen corresponding path program 2 times [2021-12-17 23:07:54,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:54,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494120434] [2021-12-17 23:07:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:54,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:54,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:54,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494120434] [2021-12-17 23:07:54,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494120434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:54,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:54,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:07:54,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865319918] [2021-12-17 23:07:54,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:54,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:07:54,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:07:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:07:54,513 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-17 23:07:54,513 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:54,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-17 23:07:54,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:54,639 INFO L129 PetriNetUnfolder]: 371/880 cut-off events. [2021-12-17 23:07:54,639 INFO L130 PetriNetUnfolder]: For 438/442 co-relation queries the response was YES. [2021-12-17 23:07:54,641 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2092 conditions, 880 events. 371/880 cut-off events. For 438/442 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4695 event pairs, 69 based on Foata normal form. 18/834 useless extension candidates. Maximal degree in co-relation 2081. Up to 308 conditions per place. [2021-12-17 23:07:54,645 INFO L132 encePairwiseOnDemand]: 90/97 looper letters, 61 selfloop transitions, 22 changer transitions 2/142 dead transitions. [2021-12-17 23:07:54,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 142 transitions, 689 flow [2021-12-17 23:07:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:07:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:07:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 490 transitions. [2021-12-17 23:07:54,647 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8419243986254296 [2021-12-17 23:07:54,647 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 490 transitions. [2021-12-17 23:07:54,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 490 transitions. [2021-12-17 23:07:54,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:54,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 490 transitions. [2021-12-17 23:07:54,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,650 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,650 INFO L186 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 490 transitions. [2021-12-17 23:07:54,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 142 transitions, 689 flow [2021-12-17 23:07:54,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 23:07:54,654 INFO L242 Difference]: Finished difference. Result has 104 places, 110 transitions, 484 flow [2021-12-17 23:07:54,654 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=104, PETRI_TRANSITIONS=110} [2021-12-17 23:07:54,655 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2021-12-17 23:07:54,655 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 110 transitions, 484 flow [2021-12-17 23:07:54,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,655 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:54,655 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] [2021-12-17 23:07:54,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 23:07:54,656 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:54,656 INFO L85 PathProgramCache]: Analyzing trace with hash 954321473, now seen corresponding path program 3 times [2021-12-17 23:07:54,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:54,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060108840] [2021-12-17 23:07:54,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:54,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:54,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:54,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060108840] [2021-12-17 23:07:54,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060108840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:54,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:54,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:07:54,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560083008] [2021-12-17 23:07:54,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:54,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:07:54,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:07:54,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:07:54,805 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-17 23:07:54,806 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 110 transitions, 484 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:54,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:54,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-17 23:07:54,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:55,041 INFO L129 PetriNetUnfolder]: 528/1210 cut-off events. [2021-12-17 23:07:55,042 INFO L130 PetriNetUnfolder]: For 1156/1197 co-relation queries the response was YES. [2021-12-17 23:07:55,045 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3106 conditions, 1210 events. 528/1210 cut-off events. For 1156/1197 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7074 event pairs, 79 based on Foata normal form. 24/1170 useless extension candidates. Maximal degree in co-relation 3090. Up to 341 conditions per place. [2021-12-17 23:07:55,051 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 72 selfloop transitions, 36 changer transitions 2/167 dead transitions. [2021-12-17 23:07:55,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 167 transitions, 956 flow [2021-12-17 23:07:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 23:07:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-17 23:07:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 652 transitions. [2021-12-17 23:07:55,054 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8402061855670103 [2021-12-17 23:07:55,054 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 652 transitions. [2021-12-17 23:07:55,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 652 transitions. [2021-12-17 23:07:55,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:55,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 652 transitions. [2021-12-17 23:07:55,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.5) internal successors, (652), 8 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:55,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:55,059 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:55,059 INFO L186 Difference]: Start difference. First operand has 104 places, 110 transitions, 484 flow. Second operand 8 states and 652 transitions. [2021-12-17 23:07:55,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 167 transitions, 956 flow [2021-12-17 23:07:55,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 167 transitions, 907 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-12-17 23:07:55,067 INFO L242 Difference]: Finished difference. Result has 114 places, 122 transitions, 674 flow [2021-12-17 23:07:55,067 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=674, PETRI_PLACES=114, PETRI_TRANSITIONS=122} [2021-12-17 23:07:55,068 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 28 predicate places. [2021-12-17 23:07:55,068 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 122 transitions, 674 flow [2021-12-17 23:07:55,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:55,069 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:55,069 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] [2021-12-17 23:07:55,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 23:07:55,069 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:55,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1254726104, now seen corresponding path program 1 times [2021-12-17 23:07:55,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:55,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420173316] [2021-12-17 23:07:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:55,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:55,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:55,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420173316] [2021-12-17 23:07:55,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420173316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:07:55,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064711972] [2021-12-17 23:07:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:55,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:07:55,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:07:55,217 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) [2021-12-17 23:07:55,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 23:07:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 23:07:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:07:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:55,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:07:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:55,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064711972] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 23:07:55,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:07:55,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 12 [2021-12-17 23:07:55,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557103463] [2021-12-17 23:07:55,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:55,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 23:07:55,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 23:07:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-17 23:07:55,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-17 23:07:55,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 122 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:55,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:55,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-17 23:07:55,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:56,269 INFO L129 PetriNetUnfolder]: 1298/2750 cut-off events. [2021-12-17 23:07:56,269 INFO L130 PetriNetUnfolder]: For 4376/4422 co-relation queries the response was YES. [2021-12-17 23:07:56,275 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8036 conditions, 2750 events. 1298/2750 cut-off events. For 4376/4422 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19155 event pairs, 128 based on Foata normal form. 13/2550 useless extension candidates. Maximal degree in co-relation 8016. Up to 820 conditions per place. [2021-12-17 23:07:56,286 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 131 selfloop transitions, 54 changer transitions 2/242 dead transitions. [2021-12-17 23:07:56,286 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 242 transitions, 1716 flow [2021-12-17 23:07:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 23:07:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 23:07:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 945 transitions. [2021-12-17 23:07:56,288 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8118556701030928 [2021-12-17 23:07:56,288 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 945 transitions. [2021-12-17 23:07:56,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 945 transitions. [2021-12-17 23:07:56,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:56,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 945 transitions. [2021-12-17 23:07:56,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 78.75) internal successors, (945), 12 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,292 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,292 INFO L186 Difference]: Start difference. First operand has 114 places, 122 transitions, 674 flow. Second operand 12 states and 945 transitions. [2021-12-17 23:07:56,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 242 transitions, 1716 flow [2021-12-17 23:07:56,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 242 transitions, 1682 flow, removed 10 selfloop flow, removed 2 redundant places. [2021-12-17 23:07:56,304 INFO L242 Difference]: Finished difference. Result has 129 places, 160 transitions, 1118 flow [2021-12-17 23:07:56,304 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1118, PETRI_PLACES=129, PETRI_TRANSITIONS=160} [2021-12-17 23:07:56,305 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2021-12-17 23:07:56,305 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 160 transitions, 1118 flow [2021-12-17 23:07:56,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,305 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:56,305 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] [2021-12-17 23:07:56,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 23:07:56,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 23:07:56,520 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:56,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1683261096, now seen corresponding path program 2 times [2021-12-17 23:07:56,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:56,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939077114] [2021-12-17 23:07:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:56,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:56,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:56,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:56,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939077114] [2021-12-17 23:07:56,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939077114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:56,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:56,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:07:56,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670657932] [2021-12-17 23:07:56,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:56,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:07:56,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:07:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:07:56,609 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-17 23:07:56,609 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 160 transitions, 1118 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,609 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:56,609 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-17 23:07:56,609 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:56,876 INFO L129 PetriNetUnfolder]: 1015/2405 cut-off events. [2021-12-17 23:07:56,876 INFO L130 PetriNetUnfolder]: For 7256/7379 co-relation queries the response was YES. [2021-12-17 23:07:56,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8656 conditions, 2405 events. 1015/2405 cut-off events. For 7256/7379 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17228 event pairs, 190 based on Foata normal form. 55/2395 useless extension candidates. Maximal degree in co-relation 8629. Up to 887 conditions per place. [2021-12-17 23:07:56,915 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 90 selfloop transitions, 44 changer transitions 2/204 dead transitions. [2021-12-17 23:07:56,915 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 204 transitions, 1660 flow [2021-12-17 23:07:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:07:56,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:07:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2021-12-17 23:07:56,917 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2021-12-17 23:07:56,917 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2021-12-17 23:07:56,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2021-12-17 23:07:56,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:56,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2021-12-17 23:07:56,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,920 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,920 INFO L186 Difference]: Start difference. First operand has 129 places, 160 transitions, 1118 flow. Second operand 7 states and 562 transitions. [2021-12-17 23:07:56,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 204 transitions, 1660 flow [2021-12-17 23:07:56,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 204 transitions, 1586 flow, removed 37 selfloop flow, removed 0 redundant places. [2021-12-17 23:07:56,944 INFO L242 Difference]: Finished difference. Result has 137 places, 164 transitions, 1244 flow [2021-12-17 23:07:56,944 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1244, PETRI_PLACES=137, PETRI_TRANSITIONS=164} [2021-12-17 23:07:56,945 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 51 predicate places. [2021-12-17 23:07:56,945 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 164 transitions, 1244 flow [2021-12-17 23:07:56,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:56,945 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:56,946 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] [2021-12-17 23:07:56,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 23:07:56,946 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:56,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:56,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1549084656, now seen corresponding path program 1 times [2021-12-17 23:07:56,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:56,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23720433] [2021-12-17 23:07:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:56,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:57,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:57,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23720433] [2021-12-17 23:07:57,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23720433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:57,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:57,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:07:57,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89187595] [2021-12-17 23:07:57,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:57,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:07:57,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:07:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:07:57,005 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-17 23:07:57,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 164 transitions, 1244 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:57,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-17 23:07:57,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:57,387 INFO L129 PetriNetUnfolder]: 1244/3054 cut-off events. [2021-12-17 23:07:57,387 INFO L130 PetriNetUnfolder]: For 9223/9626 co-relation queries the response was YES. [2021-12-17 23:07:57,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11185 conditions, 3054 events. 1244/3054 cut-off events. For 9223/9626 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24198 event pairs, 223 based on Foata normal form. 104/3050 useless extension candidates. Maximal degree in co-relation 11156. Up to 1056 conditions per place. [2021-12-17 23:07:57,412 INFO L132 encePairwiseOnDemand]: 87/97 looper letters, 77 selfloop transitions, 47 changer transitions 0/206 dead transitions. [2021-12-17 23:07:57,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 206 transitions, 1740 flow [2021-12-17 23:07:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:07:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:07:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2021-12-17 23:07:57,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2021-12-17 23:07:57,414 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2021-12-17 23:07:57,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2021-12-17 23:07:57,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:57,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2021-12-17 23:07:57,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,416 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,416 INFO L186 Difference]: Start difference. First operand has 137 places, 164 transitions, 1244 flow. Second operand 6 states and 486 transitions. [2021-12-17 23:07:57,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 206 transitions, 1740 flow [2021-12-17 23:07:57,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 206 transitions, 1729 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 23:07:57,439 INFO L242 Difference]: Finished difference. Result has 144 places, 174 transitions, 1485 flow [2021-12-17 23:07:57,439 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1485, PETRI_PLACES=144, PETRI_TRANSITIONS=174} [2021-12-17 23:07:57,440 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 58 predicate places. [2021-12-17 23:07:57,440 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 174 transitions, 1485 flow [2021-12-17 23:07:57,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,440 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:57,440 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] [2021-12-17 23:07:57,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 23:07:57,441 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1932626054, now seen corresponding path program 3 times [2021-12-17 23:07:57,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:57,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887134949] [2021-12-17 23:07:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:57,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:57,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:57,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887134949] [2021-12-17 23:07:57,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887134949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:57,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:57,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:07:57,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542606182] [2021-12-17 23:07:57,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:57,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:07:57,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:07:57,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:07:57,515 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-17 23:07:57,515 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 174 transitions, 1485 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,515 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:57,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-17 23:07:57,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:57,840 INFO L129 PetriNetUnfolder]: 1237/3174 cut-off events. [2021-12-17 23:07:57,840 INFO L130 PetriNetUnfolder]: For 12836/13018 co-relation queries the response was YES. [2021-12-17 23:07:57,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12662 conditions, 3174 events. 1237/3174 cut-off events. For 12836/13018 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 25457 event pairs, 343 based on Foata normal form. 51/3131 useless extension candidates. Maximal degree in co-relation 12629. Up to 1822 conditions per place. [2021-12-17 23:07:57,910 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 97 selfloop transitions, 30 changer transitions 2/197 dead transitions. [2021-12-17 23:07:57,910 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 197 transitions, 1897 flow [2021-12-17 23:07:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:07:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 23:07:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2021-12-17 23:07:57,911 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2021-12-17 23:07:57,912 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2021-12-17 23:07:57,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2021-12-17 23:07:57,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:57,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2021-12-17 23:07:57,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,914 INFO L186 Difference]: Start difference. First operand has 144 places, 174 transitions, 1485 flow. Second operand 5 states and 405 transitions. [2021-12-17 23:07:57,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 197 transitions, 1897 flow [2021-12-17 23:07:57,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 197 transitions, 1830 flow, removed 13 selfloop flow, removed 2 redundant places. [2021-12-17 23:07:57,948 INFO L242 Difference]: Finished difference. Result has 148 places, 176 transitions, 1552 flow [2021-12-17 23:07:57,948 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1552, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2021-12-17 23:07:57,948 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 62 predicate places. [2021-12-17 23:07:57,949 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1552 flow [2021-12-17 23:07:57,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:57,949 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:57,949 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] [2021-12-17 23:07:57,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 23:07:57,950 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:57,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:57,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1062314258, now seen corresponding path program 2 times [2021-12-17 23:07:57,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:57,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389653597] [2021-12-17 23:07:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:57,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:58,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:58,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389653597] [2021-12-17 23:07:58,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389653597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:58,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:58,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:07:58,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849104951] [2021-12-17 23:07:58,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:58,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:07:58,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:07:58,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:07:58,082 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-17 23:07:58,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1552 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:58,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:58,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-17 23:07:58,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:58,563 INFO L129 PetriNetUnfolder]: 1548/4060 cut-off events. [2021-12-17 23:07:58,563 INFO L130 PetriNetUnfolder]: For 16845/17478 co-relation queries the response was YES. [2021-12-17 23:07:58,581 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16223 conditions, 4060 events. 1548/4060 cut-off events. For 16845/17478 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 35358 event pairs, 223 based on Foata normal form. 133/4045 useless extension candidates. Maximal degree in co-relation 16188. Up to 1290 conditions per place. [2021-12-17 23:07:58,597 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 94 selfloop transitions, 74 changer transitions 0/250 dead transitions. [2021-12-17 23:07:58,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 250 transitions, 2698 flow [2021-12-17 23:07:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:07:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 23:07:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 418 transitions. [2021-12-17 23:07:58,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8618556701030928 [2021-12-17 23:07:58,600 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 418 transitions. [2021-12-17 23:07:58,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 418 transitions. [2021-12-17 23:07:58,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:58,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 418 transitions. [2021-12-17 23:07:58,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:58,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:58,602 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:58,602 INFO L186 Difference]: Start difference. First operand has 148 places, 176 transitions, 1552 flow. Second operand 5 states and 418 transitions. [2021-12-17 23:07:58,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 250 transitions, 2698 flow [2021-12-17 23:07:58,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 250 transitions, 2651 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-17 23:07:58,646 INFO L242 Difference]: Finished difference. Result has 153 places, 210 transitions, 2306 flow [2021-12-17 23:07:58,646 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2306, PETRI_PLACES=153, PETRI_TRANSITIONS=210} [2021-12-17 23:07:58,647 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 67 predicate places. [2021-12-17 23:07:58,647 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 210 transitions, 2306 flow [2021-12-17 23:07:58,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:58,647 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:58,647 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] [2021-12-17 23:07:58,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 23:07:58,648 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:58,648 INFO L85 PathProgramCache]: Analyzing trace with hash 496869252, now seen corresponding path program 3 times [2021-12-17 23:07:58,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:58,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2739615] [2021-12-17 23:07:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:58,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:58,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:58,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2739615] [2021-12-17 23:07:58,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2739615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:58,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:58,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:07:58,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867130393] [2021-12-17 23:07:58,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:58,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:07:58,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:58,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:07:58,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:07:58,737 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-17 23:07:58,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 210 transitions, 2306 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:58,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:58,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-17 23:07:58,737 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:59,300 INFO L129 PetriNetUnfolder]: 1827/4755 cut-off events. [2021-12-17 23:07:59,301 INFO L130 PetriNetUnfolder]: For 24401/25097 co-relation queries the response was YES. [2021-12-17 23:07:59,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20532 conditions, 4755 events. 1827/4755 cut-off events. For 24401/25097 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 42786 event pairs, 192 based on Foata normal form. 157/4770 useless extension candidates. Maximal degree in co-relation 20494. Up to 1260 conditions per place. [2021-12-17 23:07:59,341 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 112 selfloop transitions, 85 changer transitions 3/282 dead transitions. [2021-12-17 23:07:59,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 282 transitions, 3557 flow [2021-12-17 23:07:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:07:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 23:07:59,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2021-12-17 23:07:59,343 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8536082474226804 [2021-12-17 23:07:59,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2021-12-17 23:07:59,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2021-12-17 23:07:59,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:07:59,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2021-12-17 23:07:59,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:59,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:59,346 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:59,346 INFO L186 Difference]: Start difference. First operand has 153 places, 210 transitions, 2306 flow. Second operand 5 states and 414 transitions. [2021-12-17 23:07:59,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 282 transitions, 3557 flow [2021-12-17 23:07:59,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 282 transitions, 3472 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 23:07:59,410 INFO L242 Difference]: Finished difference. Result has 160 places, 238 transitions, 3048 flow [2021-12-17 23:07:59,411 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3048, PETRI_PLACES=160, PETRI_TRANSITIONS=238} [2021-12-17 23:07:59,411 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 74 predicate places. [2021-12-17 23:07:59,411 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 238 transitions, 3048 flow [2021-12-17 23:07:59,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:59,412 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:07:59,412 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] [2021-12-17 23:07:59,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 23:07:59,412 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:07:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:07:59,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1930595810, now seen corresponding path program 4 times [2021-12-17 23:07:59,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:07:59,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16710068] [2021-12-17 23:07:59,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:07:59,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:07:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:07:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:07:59,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:07:59,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16710068] [2021-12-17 23:07:59,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16710068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:07:59,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:07:59,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:07:59,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760939575] [2021-12-17 23:07:59,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:07:59,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:07:59,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:07:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:07:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:07:59,495 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-17 23:07:59,495 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 238 transitions, 3048 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:07:59,495 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:07:59,495 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-17 23:07:59,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:07:59,808 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([270] L80-->L83: Formula: (and (= (+ v_~L~0_14 1) v_~L~0_15) (= v_~q~0_13 (+ v_~M~0_20 v_~q~0_14))) InVars {~q~0=v_~q~0_14, ~M~0=v_~M~0_20, ~L~0=v_~L~0_15} OutVars{~q~0=v_~q~0_13, ~M~0=v_~M~0_20, ~L~0=v_~L~0_14, thread3Thread1of1ForFork2_#t~post2=|v_thread3Thread1of1ForFork2_#t~post2_1|} AuxVars[] AssignedVars[~L~0, ~q~0, thread3Thread1of1ForFork2_#t~post2][190], [Black: 122#(or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 123#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 131#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 640#(or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 127#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= ~N~0 ~L~0) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 644#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 646#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), 166#true, Black: 140#(or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), 106#true, Black: 141#(< (* 4294967296 (div ~N~0 4294967296)) ~N~0), 627#true, Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 657#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (= ~N~0 ~L~0)), Black: 659#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= ~N~0 ~L~0) (= 0 thread1Thread1of1ForFork0_~cond~0)), 7#L46-1true, 103#true, 68#L99-4true, Black: 666#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1)))), Black: 669#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), 120#true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 665#(or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), 8#L83true, Black: 157#(and (= 1 thread1Thread1of1ForFork0_~cond~0) (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 153#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (= ~N~0 ~L~0)), Black: 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 686#true, Black: 677#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1)))), Black: 680#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 171#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 676#(or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1))), Black: 506#(or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (= 0 (mod thread1Thread1of1ForFork0_~cond~0 256))), Black: 495#(or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256))), 10#L72true, 150#true, Black: 615#(and (or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)) (or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256)))), Black: 619#(and (or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256))) (or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (= 0 (mod thread1Thread1of1ForFork0_~cond~0 256)))), Black: 499#(or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 674#true, Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 632#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)]) [2021-12-17 23:07:59,809 INFO L384 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2021-12-17 23:07:59,809 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-17 23:07:59,809 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-17 23:07:59,809 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-17 23:07:59,809 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([261] L72-->L64: Formula: (not (= 0 (mod v_thread2Thread1of1ForFork1_~cond~1_5 256))) InVars {thread2Thread1of1ForFork1_~cond~1=v_thread2Thread1of1ForFork1_~cond~1_5} OutVars{thread2Thread1of1ForFork1_~cond~1=v_thread2Thread1of1ForFork1_~cond~1_5} AuxVars[] AssignedVars[][151], [Black: 122#(or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 123#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 131#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 129#(and (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 640#(or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 127#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= ~N~0 ~L~0) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 644#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 646#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), 106#true, Black: 140#(or (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 141#(< (* 4294967296 (div ~N~0 4294967296)) ~N~0), Black: 144#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 142#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), Black: 657#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (= ~N~0 ~L~0)), Black: 659#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= ~N~0 ~L~0) (= 0 thread1Thread1of1ForFork0_~cond~0)), 7#L46-1true, 22#L80true, 103#true, 68#L99-4true, Black: 666#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1)))), Black: 669#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), 632#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), 120#true, Black: 154#(or (<= ~L~0 (* 4294967296 (div ~L~0 4294967296))) (and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0))), Black: 665#(or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))), Black: 157#(and (= 1 thread1Thread1of1ForFork0_~cond~0) (= ~N~0 ~L~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0)), Black: 153#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (= ~N~0 ~L~0)), 83#L64true, Black: 155#(and (<= (div thread1Thread1of1ForFork0_~cond~0 256) 0) (<= 1 thread1Thread1of1ForFork0_~cond~0)), 686#true, Black: 677#(and (or (and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread1Thread1of1ForFork0_~cond~0)) (and (= 1 thread1Thread1of1ForFork0_~cond~0) (< (* 4294967296 (div ~N~0 4294967296)) ~N~0))) (or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1)))), Black: 680#(and (<= ~N~0 (* 4294967296 (div ~N~0 4294967296))) (= 0 thread2Thread1of1ForFork1_~cond~1) (= 0 thread1Thread1of1ForFork0_~cond~0)), Black: 676#(or (and (= 0 thread2Thread1of1ForFork1_~cond~1) (<= ~N~0 (+ (* 4294967296 (div ~N~0 4294967296)) 1))) (and (< (+ (* 4294967296 (div ~N~0 4294967296)) 1) ~N~0) (= 1 thread2Thread1of1ForFork1_~cond~1))), Black: 506#(or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (= 0 (mod thread1Thread1of1ForFork0_~cond~0 256))), Black: 495#(or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256))), 150#true, Black: 615#(and (or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)) (or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256)))), 171#(<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0), Black: 619#(and (or (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (< 0 (mod thread2Thread1of1ForFork1_~cond~1 256))) (or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0) (= 0 (mod thread1Thread1of1ForFork0_~cond~0 256)))), Black: 499#(or (< 1 (mod ~N~0 4294967296)) (<= (+ (* 4294967296 (div ~L~0 4294967296)) 1) ~L~0)), 674#true, Black: 109#(and (= ~p~0 0) (= ~q~0 0)), Black: 627#true]) [2021-12-17 23:07:59,809 INFO L384 tUnfolder$Statistics]: this new event has 50 ancestors and is cut-off event [2021-12-17 23:07:59,810 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-17 23:07:59,810 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-17 23:07:59,810 INFO L387 tUnfolder$Statistics]: existing Event has 50 ancestors and is cut-off event [2021-12-17 23:08:00,137 INFO L129 PetriNetUnfolder]: 1751/4524 cut-off events. [2021-12-17 23:08:00,137 INFO L130 PetriNetUnfolder]: For 31369/31990 co-relation queries the response was YES. [2021-12-17 23:08:00,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21488 conditions, 4524 events. 1751/4524 cut-off events. For 31369/31990 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 40029 event pairs, 176 based on Foata normal form. 139/4512 useless extension candidates. Maximal degree in co-relation 21447. Up to 1500 conditions per place. [2021-12-17 23:08:00,227 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 96 selfloop transitions, 103 changer transitions 3/284 dead transitions. [2021-12-17 23:08:00,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 284 transitions, 3873 flow [2021-12-17 23:08:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 23:08:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 23:08:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 417 transitions. [2021-12-17 23:08:00,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8597938144329897 [2021-12-17 23:08:00,229 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 417 transitions. [2021-12-17 23:08:00,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 417 transitions. [2021-12-17 23:08:00,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:00,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 417 transitions. [2021-12-17 23:08:00,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:00,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:00,231 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:00,231 INFO L186 Difference]: Start difference. First operand has 160 places, 238 transitions, 3048 flow. Second operand 5 states and 417 transitions. [2021-12-17 23:08:00,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 284 transitions, 3873 flow [2021-12-17 23:08:00,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 284 transitions, 3851 flow, removed 11 selfloop flow, removed 0 redundant places. [2021-12-17 23:08:00,321 INFO L242 Difference]: Finished difference. Result has 167 places, 250 transitions, 3488 flow [2021-12-17 23:08:00,322 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3488, PETRI_PLACES=167, PETRI_TRANSITIONS=250} [2021-12-17 23:08:00,322 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 81 predicate places. [2021-12-17 23:08:00,322 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 250 transitions, 3488 flow [2021-12-17 23:08:00,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:00,323 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:00,323 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] [2021-12-17 23:08:00,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 23:08:00,323 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:00,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1743527430, now seen corresponding path program 5 times [2021-12-17 23:08:00,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:00,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122800433] [2021-12-17 23:08:00,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:00,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:00,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:00,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122800433] [2021-12-17 23:08:00,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122800433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:08:00,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878310590] [2021-12-17 23:08:00,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 23:08:00,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:08:00,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:08:00,456 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) [2021-12-17 23:08:00,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 23:08:00,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:08:00,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:08:00,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 23:08:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:08:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:00,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:08:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:00,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878310590] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 23:08:00,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:08:00,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2021-12-17 23:08:00,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750683310] [2021-12-17 23:08:00,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:00,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:08:00,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:00,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:08:00,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:08:00,901 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-17 23:08:00,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 250 transitions, 3488 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:00,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:00,901 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-17 23:08:00,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:02,100 INFO L129 PetriNetUnfolder]: 3535/8816 cut-off events. [2021-12-17 23:08:02,101 INFO L130 PetriNetUnfolder]: For 69999/70060 co-relation queries the response was YES. [2021-12-17 23:08:02,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42344 conditions, 8816 events. 3535/8816 cut-off events. For 69999/70060 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 85821 event pairs, 439 based on Foata normal form. 43/8696 useless extension candidates. Maximal degree in co-relation 42299. Up to 1519 conditions per place. [2021-12-17 23:08:02,181 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 296 selfloop transitions, 145 changer transitions 3/499 dead transitions. [2021-12-17 23:08:02,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 499 transitions, 7767 flow [2021-12-17 23:08:02,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:08:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:08:02,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2021-12-17 23:08:02,183 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2021-12-17 23:08:02,183 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2021-12-17 23:08:02,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2021-12-17 23:08:02,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:02,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2021-12-17 23:08:02,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:02,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:02,186 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:02,186 INFO L186 Difference]: Start difference. First operand has 167 places, 250 transitions, 3488 flow. Second operand 7 states and 573 transitions. [2021-12-17 23:08:02,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 499 transitions, 7767 flow [2021-12-17 23:08:02,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 499 transitions, 7571 flow, removed 9 selfloop flow, removed 1 redundant places. [2021-12-17 23:08:02,366 INFO L242 Difference]: Finished difference. Result has 177 places, 360 transitions, 5605 flow [2021-12-17 23:08:02,367 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5605, PETRI_PLACES=177, PETRI_TRANSITIONS=360} [2021-12-17 23:08:02,368 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 91 predicate places. [2021-12-17 23:08:02,368 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 360 transitions, 5605 flow [2021-12-17 23:08:02,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:02,368 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:02,368 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] [2021-12-17 23:08:02,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-17 23:08:02,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 23:08:02,584 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:02,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1264518246, now seen corresponding path program 6 times [2021-12-17 23:08:02,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:02,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523700872] [2021-12-17 23:08:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:02,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:02,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:02,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523700872] [2021-12-17 23:08:02,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523700872] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:08:02,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960944309] [2021-12-17 23:08:02,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 23:08:02,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:08:02,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:08:02,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:08:02,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 23:08:02,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-17 23:08:02,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:08:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 23:08:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:08:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:03,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:08:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:03,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960944309] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 23:08:03,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 23:08:03,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2021-12-17 23:08:03,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809681834] [2021-12-17 23:08:03,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:03,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:08:03,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:03,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:08:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-17 23:08:03,487 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2021-12-17 23:08:03,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 360 transitions, 5605 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:03,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:03,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2021-12-17 23:08:03,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:04,798 INFO L129 PetriNetUnfolder]: 3683/8975 cut-off events. [2021-12-17 23:08:04,798 INFO L130 PetriNetUnfolder]: For 92696/92696 co-relation queries the response was YES. [2021-12-17 23:08:04,849 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49538 conditions, 8975 events. 3683/8975 cut-off events. For 92696/92696 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 87243 event pairs, 415 based on Foata normal form. 8/8868 useless extension candidates. Maximal degree in co-relation 49489. Up to 2419 conditions per place. [2021-12-17 23:08:04,904 INFO L132 encePairwiseOnDemand]: 82/97 looper letters, 266 selfloop transitions, 177 changer transitions 5/503 dead transitions. [2021-12-17 23:08:04,904 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 503 transitions, 8445 flow [2021-12-17 23:08:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:08:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:08:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2021-12-17 23:08:04,906 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2021-12-17 23:08:04,906 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2021-12-17 23:08:04,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2021-12-17 23:08:04,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:04,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2021-12-17 23:08:04,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:04,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:04,909 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:04,909 INFO L186 Difference]: Start difference. First operand has 177 places, 360 transitions, 5605 flow. Second operand 7 states and 570 transitions. [2021-12-17 23:08:04,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 503 transitions, 8445 flow [2021-12-17 23:08:05,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 503 transitions, 8365 flow, removed 40 selfloop flow, removed 0 redundant places. [2021-12-17 23:08:05,235 INFO L242 Difference]: Finished difference. Result has 189 places, 392 transitions, 6808 flow [2021-12-17 23:08:05,236 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6808, PETRI_PLACES=189, PETRI_TRANSITIONS=392} [2021-12-17 23:08:05,236 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 103 predicate places. [2021-12-17 23:08:05,236 INFO L470 AbstractCegarLoop]: Abstraction has has 189 places, 392 transitions, 6808 flow [2021-12-17 23:08:05,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:05,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:05,237 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] [2021-12-17 23:08:05,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 23:08:05,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:08:05,446 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:05,447 INFO L85 PathProgramCache]: Analyzing trace with hash 160410386, now seen corresponding path program 7 times [2021-12-17 23:08:05,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:05,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887488312] [2021-12-17 23:08:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:05,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:05,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:05,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887488312] [2021-12-17 23:08:05,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887488312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:05,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:05,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:08:05,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231769316] [2021-12-17 23:08:05,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:05,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:08:05,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:08:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:08:05,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-17 23:08:05,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 392 transitions, 6808 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:05,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:05,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-17 23:08:05,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:06,968 INFO L129 PetriNetUnfolder]: 3257/8308 cut-off events. [2021-12-17 23:08:06,968 INFO L130 PetriNetUnfolder]: For 115256/117594 co-relation queries the response was YES. [2021-12-17 23:08:07,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51458 conditions, 8308 events. 3257/8308 cut-off events. For 115256/117594 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 81654 event pairs, 411 based on Foata normal form. 362/8444 useless extension candidates. Maximal degree in co-relation 51403. Up to 1802 conditions per place. [2021-12-17 23:08:07,073 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 164 selfloop transitions, 204 changer transitions 1/492 dead transitions. [2021-12-17 23:08:07,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 492 transitions, 9245 flow [2021-12-17 23:08:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:08:07,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:08:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 501 transitions. [2021-12-17 23:08:07,075 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8608247422680413 [2021-12-17 23:08:07,075 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 501 transitions. [2021-12-17 23:08:07,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 501 transitions. [2021-12-17 23:08:07,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:07,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 501 transitions. [2021-12-17 23:08:07,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.5) internal successors, (501), 6 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:07,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:07,077 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:07,078 INFO L186 Difference]: Start difference. First operand has 189 places, 392 transitions, 6808 flow. Second operand 6 states and 501 transitions. [2021-12-17 23:08:07,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 492 transitions, 9245 flow [2021-12-17 23:08:07,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 492 transitions, 9237 flow, removed 4 selfloop flow, removed 0 redundant places. [2021-12-17 23:08:07,330 INFO L242 Difference]: Finished difference. Result has 195 places, 429 transitions, 8170 flow [2021-12-17 23:08:07,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8170, PETRI_PLACES=195, PETRI_TRANSITIONS=429} [2021-12-17 23:08:07,331 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 109 predicate places. [2021-12-17 23:08:07,331 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 429 transitions, 8170 flow [2021-12-17 23:08:07,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:07,332 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:07,332 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] [2021-12-17 23:08:07,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 23:08:07,332 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash -313546284, now seen corresponding path program 4 times [2021-12-17 23:08:07,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:07,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982686348] [2021-12-17 23:08:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:07,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:07,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:07,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982686348] [2021-12-17 23:08:07,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982686348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:07,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:07,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:08:07,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702600980] [2021-12-17 23:08:07,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:07,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:08:07,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:07,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:08:07,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:08:07,380 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-17 23:08:07,381 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 429 transitions, 8170 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:07,381 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:07,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-17 23:08:07,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:08,862 INFO L129 PetriNetUnfolder]: 3480/8909 cut-off events. [2021-12-17 23:08:08,862 INFO L130 PetriNetUnfolder]: For 130700/131320 co-relation queries the response was YES. [2021-12-17 23:08:08,908 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55838 conditions, 8909 events. 3480/8909 cut-off events. For 130700/131320 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 87595 event pairs, 609 based on Foata normal form. 157/8818 useless extension candidates. Maximal degree in co-relation 55781. Up to 5106 conditions per place. [2021-12-17 23:08:08,949 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 349 selfloop transitions, 42 changer transitions 7/479 dead transitions. [2021-12-17 23:08:08,949 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 479 transitions, 9626 flow [2021-12-17 23:08:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:08:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:08:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2021-12-17 23:08:08,951 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2021-12-17 23:08:08,951 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2021-12-17 23:08:08,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2021-12-17 23:08:08,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:08,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2021-12-17 23:08:08,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:08,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:08,953 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:08,953 INFO L186 Difference]: Start difference. First operand has 195 places, 429 transitions, 8170 flow. Second operand 6 states and 476 transitions. [2021-12-17 23:08:08,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 479 transitions, 9626 flow [2021-12-17 23:08:09,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 479 transitions, 9368 flow, removed 11 selfloop flow, removed 3 redundant places. [2021-12-17 23:08:09,212 INFO L242 Difference]: Finished difference. Result has 200 places, 423 transitions, 7845 flow [2021-12-17 23:08:09,213 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7665, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7845, PETRI_PLACES=200, PETRI_TRANSITIONS=423} [2021-12-17 23:08:09,213 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 114 predicate places. [2021-12-17 23:08:09,213 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 423 transitions, 7845 flow [2021-12-17 23:08:09,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:09,213 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:09,214 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:08:09,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 23:08:09,214 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:09,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:09,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1856250638, now seen corresponding path program 8 times [2021-12-17 23:08:09,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:09,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859043652] [2021-12-17 23:08:09,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:09,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:09,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:09,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859043652] [2021-12-17 23:08:09,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859043652] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:08:09,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851848105] [2021-12-17 23:08:09,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:08:09,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:08:09,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:08:09,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:08:09,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 23:08:09,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:08:09,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:08:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 23:08:09,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:08:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:09,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:08:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:10,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851848105] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:08:10,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:08:10,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2021-12-17 23:08:10,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632105277] [2021-12-17 23:08:10,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:08:10,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 23:08:10,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:10,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 23:08:10,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-12-17 23:08:10,429 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-12-17 23:08:10,429 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 423 transitions, 7845 flow. Second operand has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:10,429 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:10,429 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-12-17 23:08:10,430 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:14,047 INFO L129 PetriNetUnfolder]: 7939/19589 cut-off events. [2021-12-17 23:08:14,047 INFO L130 PetriNetUnfolder]: For 271615/272374 co-relation queries the response was YES. [2021-12-17 23:08:14,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117804 conditions, 19589 events. 7939/19589 cut-off events. For 271615/272374 co-relation queries the response was YES. Maximal size of possible extension queue 1500. Compared 220099 event pairs, 1036 based on Foata normal form. 509/19654 useless extension candidates. Maximal degree in co-relation 117744. Up to 4666 conditions per place. [2021-12-17 23:08:14,385 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 663 selfloop transitions, 204 changer transitions 22/984 dead transitions. [2021-12-17 23:08:14,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 984 transitions, 20052 flow [2021-12-17 23:08:14,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 23:08:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-12-17 23:08:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1097 transitions. [2021-12-17 23:08:14,409 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7539518900343642 [2021-12-17 23:08:14,409 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1097 transitions. [2021-12-17 23:08:14,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1097 transitions. [2021-12-17 23:08:14,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:14,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1097 transitions. [2021-12-17 23:08:14,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.13333333333334) internal successors, (1097), 15 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:14,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:14,413 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 97.0) internal successors, (1552), 16 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:14,413 INFO L186 Difference]: Start difference. First operand has 200 places, 423 transitions, 7845 flow. Second operand 15 states and 1097 transitions. [2021-12-17 23:08:14,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 984 transitions, 20052 flow [2021-12-17 23:08:15,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 984 transitions, 19998 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-12-17 23:08:15,085 INFO L242 Difference]: Finished difference. Result has 224 places, 567 transitions, 11362 flow [2021-12-17 23:08:15,085 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7783, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11362, PETRI_PLACES=224, PETRI_TRANSITIONS=567} [2021-12-17 23:08:15,086 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 138 predicate places. [2021-12-17 23:08:15,086 INFO L470 AbstractCegarLoop]: Abstraction has has 224 places, 567 transitions, 11362 flow [2021-12-17 23:08:15,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 67.875) internal successors, (1086), 16 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:15,087 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:15,087 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] [2021-12-17 23:08:15,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 23:08:15,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 23:08:15,303 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:15,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:15,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1264114124, now seen corresponding path program 9 times [2021-12-17 23:08:15,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:15,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186949676] [2021-12-17 23:08:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:15,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:15,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:15,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186949676] [2021-12-17 23:08:15,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186949676] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:15,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:15,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 23:08:15,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026529298] [2021-12-17 23:08:15,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:15,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 23:08:15,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:15,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 23:08:15,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 23:08:15,400 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2021-12-17 23:08:15,400 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 567 transitions, 11362 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:15,400 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:15,400 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2021-12-17 23:08:15,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:19,695 INFO L129 PetriNetUnfolder]: 9117/21755 cut-off events. [2021-12-17 23:08:19,696 INFO L130 PetriNetUnfolder]: For 404301/410756 co-relation queries the response was YES. [2021-12-17 23:08:19,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151697 conditions, 21755 events. 9117/21755 cut-off events. For 404301/410756 co-relation queries the response was YES. Maximal size of possible extension queue 1697. Compared 244483 event pairs, 588 based on Foata normal form. 1046/22375 useless extension candidates. Maximal degree in co-relation 151626. Up to 4546 conditions per place. [2021-12-17 23:08:19,987 INFO L132 encePairwiseOnDemand]: 88/97 looper letters, 350 selfloop transitions, 312 changer transitions 5/842 dead transitions. [2021-12-17 23:08:19,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 842 transitions, 18339 flow [2021-12-17 23:08:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 23:08:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 23:08:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 580 transitions. [2021-12-17 23:08:19,989 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8541973490427098 [2021-12-17 23:08:19,989 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 580 transitions. [2021-12-17 23:08:19,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 580 transitions. [2021-12-17 23:08:19,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:19,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 580 transitions. [2021-12-17 23:08:19,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:19,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:19,991 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:19,991 INFO L186 Difference]: Start difference. First operand has 224 places, 567 transitions, 11362 flow. Second operand 7 states and 580 transitions. [2021-12-17 23:08:19,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 842 transitions, 18339 flow [2021-12-17 23:08:21,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 842 transitions, 18076 flow, removed 69 selfloop flow, removed 5 redundant places. [2021-12-17 23:08:21,146 INFO L242 Difference]: Finished difference. Result has 227 places, 683 transitions, 14893 flow [2021-12-17 23:08:21,146 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=11149, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14893, PETRI_PLACES=227, PETRI_TRANSITIONS=683} [2021-12-17 23:08:21,147 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 141 predicate places. [2021-12-17 23:08:21,147 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 683 transitions, 14893 flow [2021-12-17 23:08:21,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:21,147 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:21,147 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] [2021-12-17 23:08:21,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 23:08:21,148 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash 414098696, now seen corresponding path program 10 times [2021-12-17 23:08:21,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:21,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89202120] [2021-12-17 23:08:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:21,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:21,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:21,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89202120] [2021-12-17 23:08:21,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89202120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:21,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:21,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:08:21,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197097455] [2021-12-17 23:08:21,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:21,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:08:21,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:21,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:08:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:08:21,241 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-17 23:08:21,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 683 transitions, 14893 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:21,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:21,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-17 23:08:21,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:26,678 INFO L129 PetriNetUnfolder]: 10838/25209 cut-off events. [2021-12-17 23:08:26,679 INFO L130 PetriNetUnfolder]: For 524599/525885 co-relation queries the response was YES. [2021-12-17 23:08:26,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185475 conditions, 25209 events. 10838/25209 cut-off events. For 524599/525885 co-relation queries the response was YES. Maximal size of possible extension queue 1985. Compared 284449 event pairs, 2008 based on Foata normal form. 224/24903 useless extension candidates. Maximal degree in co-relation 185401. Up to 16445 conditions per place. [2021-12-17 23:08:27,050 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 599 selfloop transitions, 73 changer transitions 8/789 dead transitions. [2021-12-17 23:08:27,060 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 789 transitions, 18596 flow [2021-12-17 23:08:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:08:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:08:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 483 transitions. [2021-12-17 23:08:27,061 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8298969072164949 [2021-12-17 23:08:27,061 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 483 transitions. [2021-12-17 23:08:27,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 483 transitions. [2021-12-17 23:08:27,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:27,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 483 transitions. [2021-12-17 23:08:27,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.5) internal successors, (483), 6 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:27,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:27,066 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:27,066 INFO L186 Difference]: Start difference. First operand has 227 places, 683 transitions, 14893 flow. Second operand 6 states and 483 transitions. [2021-12-17 23:08:27,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 789 transitions, 18596 flow [2021-12-17 23:08:28,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 789 transitions, 18301 flow, removed 51 selfloop flow, removed 4 redundant places. [2021-12-17 23:08:29,001 INFO L242 Difference]: Finished difference. Result has 230 places, 697 transitions, 15269 flow [2021-12-17 23:08:29,002 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=14645, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=15269, PETRI_PLACES=230, PETRI_TRANSITIONS=697} [2021-12-17 23:08:29,002 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 144 predicate places. [2021-12-17 23:08:29,002 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 697 transitions, 15269 flow [2021-12-17 23:08:29,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:29,003 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:29,003 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] [2021-12-17 23:08:29,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 23:08:29,003 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash -543696476, now seen corresponding path program 11 times [2021-12-17 23:08:29,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:29,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103302373] [2021-12-17 23:08:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:29,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:29,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:29,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103302373] [2021-12-17 23:08:29,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103302373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 23:08:29,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 23:08:29,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 23:08:29,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958716658] [2021-12-17 23:08:29,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 23:08:29,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 23:08:29,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 23:08:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 23:08:29,085 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2021-12-17 23:08:29,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 697 transitions, 15269 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:29,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:29,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2021-12-17 23:08:29,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:34,283 INFO L129 PetriNetUnfolder]: 10774/24919 cut-off events. [2021-12-17 23:08:34,283 INFO L130 PetriNetUnfolder]: For 517020/518480 co-relation queries the response was YES. [2021-12-17 23:08:34,515 INFO L84 FinitePrefix]: Finished finitePrefix Result has 182208 conditions, 24919 events. 10774/24919 cut-off events. For 517020/518480 co-relation queries the response was YES. Maximal size of possible extension queue 1964. Compared 279741 event pairs, 2490 based on Foata normal form. 254/24575 useless extension candidates. Maximal degree in co-relation 182135. Up to 16537 conditions per place. [2021-12-17 23:08:34,682 INFO L132 encePairwiseOnDemand]: 89/97 looper letters, 522 selfloop transitions, 60 changer transitions 3/693 dead transitions. [2021-12-17 23:08:34,683 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 693 transitions, 16243 flow [2021-12-17 23:08:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 23:08:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-17 23:08:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 461 transitions. [2021-12-17 23:08:34,684 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7920962199312714 [2021-12-17 23:08:34,684 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 461 transitions. [2021-12-17 23:08:34,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 461 transitions. [2021-12-17 23:08:34,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:34,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 461 transitions. [2021-12-17 23:08:34,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.83333333333333) internal successors, (461), 6 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:34,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:34,686 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:34,686 INFO L186 Difference]: Start difference. First operand has 230 places, 697 transitions, 15269 flow. Second operand 6 states and 461 transitions. [2021-12-17 23:08:34,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 693 transitions, 16243 flow [2021-12-17 23:08:36,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 693 transitions, 15865 flow, removed 45 selfloop flow, removed 10 redundant places. [2021-12-17 23:08:36,347 INFO L242 Difference]: Finished difference. Result has 223 places, 688 transitions, 14774 flow [2021-12-17 23:08:36,348 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=14659, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=629, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14774, PETRI_PLACES=223, PETRI_TRANSITIONS=688} [2021-12-17 23:08:36,348 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 137 predicate places. [2021-12-17 23:08:36,348 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 688 transitions, 14774 flow [2021-12-17 23:08:36,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:36,349 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:36,349 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:08:36,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 23:08:36,349 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1290791200, now seen corresponding path program 1 times [2021-12-17 23:08:36,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:36,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728559148] [2021-12-17 23:08:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:36,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:36,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:36,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728559148] [2021-12-17 23:08:36,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728559148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:08:36,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320328115] [2021-12-17 23:08:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:36,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:08:36,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:08:36,484 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:08:36,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 23:08:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:36,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-17 23:08:36,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:08:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:37,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:08:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:41,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320328115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:08:41,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:08:41,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 19 [2021-12-17 23:08:41,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819376271] [2021-12-17 23:08:41,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:08:41,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 23:08:41,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:41,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 23:08:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=274, Unknown=2, NotChecked=0, Total=342 [2021-12-17 23:08:41,581 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-12-17 23:08:41,582 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 688 transitions, 14774 flow. Second operand has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:41,582 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:41,582 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-12-17 23:08:41,582 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:48,380 INFO L129 PetriNetUnfolder]: 10220/25444 cut-off events. [2021-12-17 23:08:48,380 INFO L130 PetriNetUnfolder]: For 523978/526728 co-relation queries the response was YES. [2021-12-17 23:08:48,650 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185968 conditions, 25444 events. 10220/25444 cut-off events. For 523978/526728 co-relation queries the response was YES. Maximal size of possible extension queue 1983. Compared 295999 event pairs, 444 based on Foata normal form. 859/25704 useless extension candidates. Maximal degree in co-relation 185899. Up to 8221 conditions per place. [2021-12-17 23:08:48,834 INFO L132 encePairwiseOnDemand]: 84/97 looper letters, 737 selfloop transitions, 284 changer transitions 7/1164 dead transitions. [2021-12-17 23:08:48,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 1164 transitions, 27639 flow [2021-12-17 23:08:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 23:08:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-17 23:08:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1000 transitions. [2021-12-17 23:08:48,836 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7363770250368189 [2021-12-17 23:08:48,836 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1000 transitions. [2021-12-17 23:08:48,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1000 transitions. [2021-12-17 23:08:48,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:48,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1000 transitions. [2021-12-17 23:08:48,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 71.42857142857143) internal successors, (1000), 14 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:48,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 97.0) internal successors, (1455), 15 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:48,840 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 97.0) internal successors, (1455), 15 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:48,840 INFO L186 Difference]: Start difference. First operand has 223 places, 688 transitions, 14774 flow. Second operand 14 states and 1000 transitions. [2021-12-17 23:08:48,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 1164 transitions, 27639 flow [2021-12-17 23:08:50,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1164 transitions, 27426 flow, removed 5 selfloop flow, removed 8 redundant places. [2021-12-17 23:08:50,554 INFO L242 Difference]: Finished difference. Result has 230 places, 849 transitions, 18627 flow [2021-12-17 23:08:50,555 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=14600, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18627, PETRI_PLACES=230, PETRI_TRANSITIONS=849} [2021-12-17 23:08:50,555 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 144 predicate places. [2021-12-17 23:08:50,555 INFO L470 AbstractCegarLoop]: Abstraction has has 230 places, 849 transitions, 18627 flow [2021-12-17 23:08:50,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 67.0) internal successors, (1273), 19 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:50,556 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:08:50,556 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:08:50,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 23:08:50,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:08:50,758 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:08:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:08:50,758 INFO L85 PathProgramCache]: Analyzing trace with hash -713067894, now seen corresponding path program 2 times [2021-12-17 23:08:50,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:08:50,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999997558] [2021-12-17 23:08:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:08:50,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:08:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:08:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:50,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:08:50,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999997558] [2021-12-17 23:08:50,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999997558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:08:50,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680497674] [2021-12-17 23:08:50,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 23:08:50,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:08:50,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:08:50,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:08:50,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 23:08:51,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 23:08:51,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:08:51,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 23:08:51,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:08:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:51,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:08:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:08:52,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680497674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:08:52,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:08:52,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2021-12-17 23:08:52,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251541237] [2021-12-17 23:08:52,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:08:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 23:08:52,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:08:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 23:08:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-17 23:08:52,008 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2021-12-17 23:08:52,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 849 transitions, 18627 flow. Second operand has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:52,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:08:52,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2021-12-17 23:08:52,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 23:08:58,975 INFO L129 PetriNetUnfolder]: 12105/29402 cut-off events. [2021-12-17 23:08:58,975 INFO L130 PetriNetUnfolder]: For 652426/653912 co-relation queries the response was YES. [2021-12-17 23:08:59,279 INFO L84 FinitePrefix]: Finished finitePrefix Result has 225548 conditions, 29402 events. 12105/29402 cut-off events. For 652426/653912 co-relation queries the response was YES. Maximal size of possible extension queue 2363. Compared 345974 event pairs, 1755 based on Foata normal form. 408/28980 useless extension candidates. Maximal degree in co-relation 225476. Up to 17258 conditions per place. [2021-12-17 23:08:59,650 INFO L132 encePairwiseOnDemand]: 85/97 looper letters, 792 selfloop transitions, 241 changer transitions 4/1120 dead transitions. [2021-12-17 23:08:59,655 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 1120 transitions, 26467 flow [2021-12-17 23:08:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 23:08:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 23:08:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 829 transitions. [2021-12-17 23:08:59,658 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7121993127147767 [2021-12-17 23:08:59,659 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 829 transitions. [2021-12-17 23:08:59,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 829 transitions. [2021-12-17 23:08:59,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 23:08:59,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 829 transitions. [2021-12-17 23:08:59,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.08333333333333) internal successors, (829), 12 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:59,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:59,671 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 97.0) internal successors, (1261), 13 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:08:59,671 INFO L186 Difference]: Start difference. First operand has 230 places, 849 transitions, 18627 flow. Second operand 12 states and 829 transitions. [2021-12-17 23:08:59,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 1120 transitions, 26467 flow [2021-12-17 23:09:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1120 transitions, 25976 flow, removed 202 selfloop flow, removed 5 redundant places. [2021-12-17 23:09:02,123 INFO L242 Difference]: Finished difference. Result has 238 places, 951 transitions, 21297 flow [2021-12-17 23:09:02,124 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=18182, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21297, PETRI_PLACES=238, PETRI_TRANSITIONS=951} [2021-12-17 23:09:02,124 INFO L334 CegarLoopForPetriNet]: 86 programPoint places, 152 predicate places. [2021-12-17 23:09:02,124 INFO L470 AbstractCegarLoop]: Abstraction has has 238 places, 951 transitions, 21297 flow [2021-12-17 23:09:02,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.70588235294117) internal successors, (1117), 17 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:02,125 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 23:09:02,125 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 23:09:02,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 23:09:02,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:02,332 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-17 23:09:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 23:09:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash -181831744, now seen corresponding path program 3 times [2021-12-17 23:09:02,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 23:09:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196951720] [2021-12-17 23:09:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 23:09:02,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 23:09:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 23:09:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:02,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 23:09:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196951720] [2021-12-17 23:09:02,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196951720] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 23:09:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897324484] [2021-12-17 23:09:02,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 23:09:02,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 23:09:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 23:09:02,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 23:09:02,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 23:09:02,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 23:09:02,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 23:09:02,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 23:09:02,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 23:09:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:02,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 23:09:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 23:09:07,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897324484] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 23:09:07,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 23:09:07,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2021-12-17 23:09:07,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813700526] [2021-12-17 23:09:07,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 23:09:07,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 23:09:07,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 23:09:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 23:09:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2021-12-17 23:09:07,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2021-12-17 23:09:07,960 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 951 transitions, 21297 flow. Second operand has 18 states, 18 states have (on average 66.94444444444444) internal successors, (1205), 18 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 23:09:07,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 23:09:07,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2021-12-17 23:09:07,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand